BASIC DESIGN EQUATIONS FOR MULTIPHASE REACTORS
|
|
- Cleopatra Dora Greer
- 5 years ago
- Views:
Transcription
1 BASIC DESIGN EQUATIONS FOR MULTIPHASE REACTORS
2 Starting Reference 1. P. A. Ramachandran and R. V. Chaudhari, Three-Phase Catalytic Reactors, Gordon and Breach Publishers, New York, (1983). 2. Nigam, K.D.P. and Schumpe, A., Three-phase sparged reactors, Topics in chemical engineering, 8, , , (1996) 3. Trambouze, P., H. Van Landeghem, J.-P. Wauquier, Chemical Reactors: Design, Engineering, Operation, Technip, (2004) 2
3 Objectives 1. Review microkinetic and macrokinetic processes that occur in soluble and solid-catalyzed systems. 2. Review ideal flow patterns for homogeneous systems as a precursor for application to multiphase systems. 3. Derive basic reactor performance equations using ideal flow patterns for the various phases. 4. Introduce non-ideal fluid mixing models. 5. Illustrate concepts through use of case studies. 3
4 Types of Multiphase Reactions Reaction Type Degree of Difficulty Gas-liquid without catalyst Gas-liquid with soluble catalyst Gas-liquid with solid catalyst Gas-liquid-liquid with soluble or solid catalyst Gas-liquid-liquid with soluble or solid catalyst (two liquid phases) Straightforward Complex 4
5 Hierarchy of Multiphase Reactor Models Model Type Empirical Ideal Flow Patterns Phenomenological Volume-Averaged Conservation Laws Implementation Straightforward Insight Very little Pointwise Conservation Laws Very Difficult or Impossible Significant 5
6 Macrokinetic Processes in Slurry Reactors Hydrodynamics of the multi-phase dispersion - Fluid holdups & holdup distribution - Fluid and particle specific interfacial areas - Bubble size & catalyst size distributions Fluid macromixing - PDF s of the various phases Fluid micromixing - Bubble coalescence & breakage - Catalyst particle agglomeration & attrition Reactor Model Heat transfer phenomena - Liquid evaporation & condensation - Fluid-to-wall, fluid-to-internal coils, etc. Energy dissipation - Power input from variouis sources (e.g., stirrers, fluid-fluid interactions, ) 6
7 Macrokinetic Processes in Fixed-Bed Reactors Hydrodynamics of the multi-phase flows - Flow regimes & pressure drop - Fluid holdups & holdup distribution - Fluid-fluid & fluid-particle specific interfacial areas - Fluid distribution Fluid macromixing - PDF s of the various phases Heat transfer phenomena - Liquid evaporation & condensation - Fluid-to-wall, fluid-to-internal coils, etc. Reactor Model Energy dissipation - Pressure drop (e.g., stirrers, fluid-fluid interactions, ) 7
8 Elements of the Reactor Model Micro or Local Analysis Macro or Global Analysis Gas - liquid mass transfer Liquid - solid mass transfer Interparticle and interphase mass transfer Intraparticle and intraphase diffusion Intraparticle and intraphase heat transfer Catalyst particle wetting Flow patterns for the gas, liquid, and solids Hydrodynamics of the gas, liquid, and solids Macro distributions of the gas, liquid and solid Heat exchange Other types of transport phenomena 8
9 Reactor Design Variables Feed Q in T in C in Reactor Q out T out C out Product Reactor Process Reaction Flow = f Performance Variables Rates Patterns Conversion Flow rates Kinetics Macro Selectivity Inlet C & T Transport Micro Activity Heat exchange 9
10 Ideal Flow Patterns for Single-Phase Systems Q (m 3 /s) Q (m 3 /s) a. Plug-Flow Q (m 3 /s) Q (m 3 /s) b. Backmixed Flow 10
11 Impulse Tracer Response x(t) M T t y(t) Q (m 3 /s) t Reactor System t Q (m 3 /s) E(t) dt y(t) dt M / Q T Fraction of the outflow with a residence time between t and t + dt E(t) is the P.D.F. of the residence time distribution Tracer mass balance requirement: M T Q y(t) dt o 11
12 Fluid-Phase Mixing: Single Phase, Plug Flow Q (m 3 /s) 12
13 Fluid-Phase Mixing: Single Phase, Backmixed Q (m 3 /s) Mi = Mass of tracer injected (kmol) 13
14 Idealized Mixing Models for Multiphase Reactors Model Gas-Phase Liquid Phase Solid-Phase Reactor Type 1 Plug-flow Plug-flow Fixed Trickle-Bed Flooded-Bed 2 Backmixed Backmixed Backmixed Mechanically agitated 3 Plug-Flow Backmixed Backmixed Bubble column Ebullated - bed Gas-Lift & Loop 14
15 Ideal Flow Patterns in Multiphase Reactors Example: Mechanically Agitated Reactors or V R = v G + V L + V C 1 = G + L + C G Vr Q G G L Vr ( 1 G L ) Q L 15
16 First Absolute Moment of the Tracer Response for Multiphase Systems For a single mobile phase in contact with p stagnant phases: V = p j = 2 Q 1 K 1j V j For p mobile phases in contact with p - 1 mobile phases: 1 = V 1 + Q 1 + p j = 2 p j = 2 K 1j V j K 1j Q j K 1j = C j C 1 equil. is the partition coefficient of the tracer between phase 1 and j 16
17 Relating the PDF to Reactor Performance For any system where the covariance of sojourn times is zero (i.e., when the tracer leaves and re-enters the flowing stream at the same spatial position), the PDF of sojourn times in the reaction environment can be obtained from the exit-age PDF for a non-adsorbing tracer that remains confined to the flowing phase external to other phases present in the system. For a first-order process: H p (k c ) = pdf for the stagnant phase - H (k 1 c ) t A ext 0 - ( kww / Q 1) t e E ext 0 p - X = e E (t) dt = (t) dt 17
18 Illustrations of Ideal-Mixing Models for Multiphase Reactors Stirred tank Bubble Column z z Trickle - Bed Flooded - Bed G L Plug-flow of gas Backmixed liquid & catalyst Batch catalyst Catalyst is fully wetted G L Plug-flow of gas Plug-flow of liquid Fixed-bed of catalyst Catalyst is fully wetted 18
19 Intrinsic Reaction Rates Reaction Scheme: A (g) + vb (l) C (l) 19
20 Gas Limiting and Plug-Flow of Liquid Key Assumptions 1. Gaseous reactant is limiting 2. First-order reaction wrt dissolved gas 3. Constant gas-phase concentration G L z 4. Plug-flow of liquid 5. Isothermal operation 6. Liquid is nonvolatile 7. Catalyst concentration is constant 8. Finite gas-liquid, liquid-solid, and intraparticle gradients 20
21 Concentration or Axial Height Gas Limiting and Plug flow of liquid Constant gas phase concentration valid for pure gas at high flow rate Q l A Relative distance from catalyst particle (Net input by convection) l z Q A l l zdz + (Input by Gas- (Loss by Liquidsolid Transport) = 0 Liquid Transport) - (1) k Dividing by Ar.dz and taking limit dz l a B * A A A dz- k a A A A dz= 0 l r s p l s r (2) (3) (4) 21
22 Gas Limiting and Plug flow of liquid 22
23 Gas Limiting and Plug flow of liquid Solving the Model Equations 23
24 R Concept of Reactor Efficiency Rate of rxn in the Entire Reactor with Transport Effects Maximum Possible Rate 24
25 Conversion of Reactant B (in terms of Reactor Efficiency) 25
26 Gas Limiting and Backmixed Liquid Stirred Tank Key Assumptions Bubble Column z G L 1. Gaseous reactant is limiting 2. First-order reaction wrt dissolved gas 3. Constant gas-phase concentration 4. Liquid and catalyst are backmixed 5. Isothermal operation 6. Liquid is nonvolatile 7. Catalyst concentration is constant 8. Finite gas-liquid, liquid-solid, and intraparticle gradients 26
27 Concentration or Axial Height Gas Limiting and Backmixed Liquid Relative distance from catalyst particle -Concentration of dissolved gas in the liquid bulk is constant [ f(z)] [=A l,0 ] -Concentration of liquid reactant in the liquid bulk is constant [ f(z)] [=B l,0 ] A in liquid bulk: Analysis is similar to the previous case 27
28 Gas Limiting and Backmixed Liquid A at the catalyst surface: For Reactant B: (Net input by flow) = (Rate of rxn of B at the catalyst surface) (Note: No transport to gas since B is non-volatile) 28
29 Gas Limiting and Backmixed Liquid Solving the Model Equations 29
30 A Flow Patterns Concepts for Multiphase Systems A - Single phase flow of gas or liquid with exchange between the mobile phase and stagnant phase. Fixed beds, Trickle-beds, packed bubble columns B - Single phase flow of gas or liquid with exchange between a partially backmixed stagnant phase. Semi-batch slurries, fluidized-beds, ebullated beds B 30
31 Flow Patterns Concepts for Multiphase Systems C D C, D - Cocurrent or countercurrent two-phase flow with exchange between the phases and stagnant phase. Trickle-beds, packed or empty bubble columns E E - Exchange between two flowing phases, one of which has strong internal recirculation. Empty bubble columns and fluidized beds 31
32 Axial Dispersion Model (Single Phase) C z = 0 Let τ C t D η = 0 2 C 2 z u C dz R C u0c0 uc D ax z z L 1 Pe C ax 0 Pe ax 2 C 2 η C ul D 1 Pe ax C dη ax τ C η L u τr Basis: Plug flow with superimposed diffusional transport in the direction of flow C z = L 0 C =
Gas Liquid and Gas- Liquid Solid Reactions. A. Gas Liquid Systems
Gas iquid and Gas- iquid Solid Reactions A. Gas iquid Systems Proper Approach to Gas-iquid Reactions References Mass Transfer theories Gas-liquid reaction regimes Multiphase reactors and selection criterion
More informationNirma University Institute of Technology Chemical Engineering Department, Handouts -RRP- CRE-II. Handouts
Handouts Handout 1: Practical reactor performance deviates from that of ideal reactor s : Packed bed reactor Channeling CSTR & Batch Dead Zones, Bypass PFR deviation from plug flow dispersion Deviation
More information1. Introductory Material
CHEE 321: Chemical Reaction Engineering 1. Introductory Material 1b. The General Mole Balance Equation (GMBE) and Ideal Reactors (Fogler Chapter 1) Recap: Module 1a System with Rxn: use mole balances Input
More informationA First Course on Kinetics and Reaction Engineering Unit 33. Axial Dispersion Model
Unit 33. Axial Dispersion Model Overview In the plug flow reactor model, concentration only varies in the axial direction, and the sole causes of that variation are convection and reaction. Unit 33 describes
More informationChemical Reaction Engineering
Lecture 32! Chemical Reaction Engineering (CRE) is the field that studies the rates and mechanisms of chemical reactions and the design of the reactors in which they take place.!! 1! Lecture 32 Thursday
More informationCHEMICAL REACTION ENGINEERING LAB
CHEMICAL REACTION ENGINEERING LAB EQUIPMENTS 1.CHEMICAL REACTORS SERVICE UNIT The chemical reactors service unit consists of a moulded ABS plinth which is used as a mounting for the chemical reactor to
More informationLecture (9) Reactor Sizing. Figure (1). Information needed to predict what a reactor can do.
Lecture (9) Reactor Sizing 1.Introduction Chemical kinetics is the study of chemical reaction rates and reaction mechanisms. The study of chemical reaction engineering (CRE) combines the study of chemical
More informationMULTIPHASE FLOW MODELLING
MULTIPHASE FLOW MODELLING 1 Introduction 2 Outline Multiphase Flow Modeling Discrete phase model Eulerian model Mixture model Volume-of-fluid model Reacting Flow Modeling Eddy dissipation model Non-premixed,
More informationChemical Reaction Engineering - Part 16 - more reactors Richard K. Herz,
Chemical Reaction Engineering - Part 16 - more reactors Richard K. Herz, rherz@ucsd.edu, www.reactorlab.net More reactors So far we have learned about the three basic types of reactors: Batch, PFR, CSTR.
More informationPHEN 612 SPRING 2008 WEEK 12 LAURENT SIMON
PHEN 612 SPRING 28 WEEK 12 LAURENT SIMON Mixing in Reactors Agitation, Mixing of Fluids and Power requirements Agitation and mixing are two of the most common operations in the processing industries Agitation:
More informationReview: Nonideal Flow in a CSTR
L3- Review: Nonideal Flow in a CSTR Ideal CSTR: uniform reactant concentration throughout the vessel Real stirred tank Relatively high reactant concentration at the feed entrance Relatively low concentration
More informationAGITATION AND AERATION
AGITATION AND AERATION Although in many aerobic cultures, gas sparging provides the method for both mixing and aeration - it is important that these two aspects of fermenter design be considered separately.
More informationCHEMICAL REACTORS - PROBLEMS OF NON IDEAL REACTORS 61-78
011-01 ourse HEMIL RETORS - PROBLEMS OF NON IDEL RETORS 61-78 61.- ccording to several experiments carried out in a continuous stirred tank reactor we suspect that the behavior of the reactor is not ideal.
More informationEngineering Theory of Leaching
Engineering Theory of Leaching An approach to non-ideal reactors and scale- up of pressure leaching systems Presented by Lynton Gormely, P.Eng., Ph.D. The Problem given lab scale batch results, predict
More informationPrinciples of Convective Heat Transfer
Massoud Kaviany Principles of Convective Heat Transfer Second Edition With 378 Figures Springer Contents Series Preface Preface to the Second Edition Preface to the First Edition Acknowledgments vii ix
More informationChemical Reaction Engineering
Chemical Reaction Engineering Dr. Yahia Alhamed Chemical and Materials Engineering Department College of Engineering King Abdulaziz University General Mole Balance Batch Reactor Mole Balance Constantly
More informationLecture 7. Sorption-Separation Equipment
Lecture 7. Sorption-Separation Equipment Adsorption - Stirred-tank, slurry operation - Cyclic fixed-bed batch operation - Thermal (temperature)-swing adsorption - Fluidizing bed for adsorption and moving
More informationAnalyzing Mass and Heat Transfer Equipment
Analyzing Mass and Heat Transfer Equipment (MHE) Analyzing Mass and Heat Transfer Equipment Scaling up to solving problems using process equipment requires both continuum and macroscopic knowledge of transport,
More informationEngineering and. Tapio Salmi Abo Akademi Abo-Turku, Finland. Jyri-Pekka Mikkola. Umea University, Umea, Sweden. Johan Warna.
Chemical Reaction Engineering and Reactor Technology Tapio Salmi Abo Akademi Abo-Turku, Finland Jyri-Pekka Mikkola Umea University, Umea, Sweden Johan Warna Abo Akademi Abo-Turku, Finland CRC Press is
More informationCOMPARTMENTAL MODELLING OF AN INDUSTRIAL BUBBLE COLUMN
COMPARTMENTAL MODELLING OF AN INDUSTRIAL BUBBLE COLUMN Christophe Wylock 1, Aurélie Larcy 1, Thierry Cartage 2, Benoît Haut 1 1 Transfers, Interfaces and Processes (TIPs) Chemical Engineering Unit, Université
More informationNon-Ideal Reactors. Definitions * Segregated flow - fluid elements do not mix, have different residence times - Need Residence Time Distribution
Non-Ideal Reactors Deviations from ideal reactor behavior - Tank Reactors: inadequate mixing, stagnant regions, bypassing or short-circuiting Tubular Reactors: mixing in longitudinal direction, incomplete
More informationSubbarao Duvvuri and Hilmi Mukhtar, Department of Chemical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Tronoh, 31750, Malaysia.
Units of Chemical Engineering Operations Subbarao Duvvuri and Hilmi Mukhtar, Department of Chemical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Tronoh, 31750, Malaysia. Abstract Research
More informationThermodynamics and Rate Processes. D.Kunzru Dept. of Chemical Engineering I.I.T.Kanpur
Thermodynamics and Rate Processes D.Kunzru Dept. of Chemical Engineering I.I.T.Kanpur Importance of Chemical Reaction Engineering chemical reactor is usually the heart of any process traditional applications:
More informationChemical Reactions and Chemical Reactors
Chemical Reactions and Chemical Reactors George W. Roberts North Carolina State University Department of Chemical and Biomolecular Engineering WILEY John Wiley & Sons, Inc. x Contents 1. Reactions and
More informationEngineering. Green Chemical. S. Suresh and S. Sundaramoorthy. and Chemical Processes. An Introduction to Catalysis, Kinetics, CRC Press
I i Green Chemical Engineering An Introduction to Catalysis, Kinetics, and Chemical Processes S. Suresh and S. Sundaramoorthy CRC Press Taylor & Francis Group Boca Raton London New York CRC Press is an
More informationChapter 8 STATISTICAL ASSESSMENT OF NUMERICAL DIFFUSION
84 hapter 8 STATISTIAL ASSESSMENT OF NUMERIAL DIFFUSION The assessment of the performance of high-order numerical methods regarding the numerical diffusion introduced in the solution of the scalar transport
More informationA First Course on Kinetics and Reaction Engineering Unit 12. Performing Kinetics Experiments
Unit 12. Performing Kinetics Experiments Overview Generating a valid rate expression for a reaction requires both a reactor and and an accurate mathematical model for that reactor. Unit 11 introduced the
More informationPRESENTATION SLIDES: Hydrodynamic Scale-Up of Circulating Fluidized Beds
Refereed Proceedings The 12th International Conference on Fluidization - New Horizons in Fluidization Engineering Engineering Conferences International Year 2007 PRESENTATION SLIDES: Hydrodynamic Scale-Up
More informationEXPERIMENTAL INVESTIGATION AND CFD MODELING OF MICROMIXING OF A SINGLE-FEED SEMI-BATCH PRECIPITATION PROCESS IN A LIQUID-LIQUID STIRRED REACTOR
14 th European onference on Mixing Warszawa, 10-13 September 2012 EXPERIMENTAL INVESTIGATION AND FD MODELING OF MIROMIXING OF A SINGLE-FEED SEMI-BATH PREIPITATION PROESS IN A LIQUID-LIQUID STIRRED REATOR
More informationNPTEL. Chemical Reaction Engineering II - Video course. Chemical Engineering. COURSE OUTLINE
NPTEL Syllabus Chemical Reaction Engineering II - Video course COURSE OUTLINE This is a typical second course in the subject of chemical reaction engineering with an emphasis on heterogeneous reaction
More information5. Collection and Analysis of. Rate Data
5. Collection and nalysis of o Objectives Rate Data - Determine the reaction order and specific reaction rate from experimental data obtained from either batch or flow reactors - Describe how to analyze
More informationENGG 199 Reacting Flows Spring Lecture 4 Gas-Liquid Mixing Reactor Selection Agitator Design
ENGG 199 Reacting Flows Spring 2006 Lecture 4 Gas-Liquid Mixing Reactor Selection gitator Design Copyright 2000,.W. Etchells, R.K.Grenville & R.D. LaRoche ll rights reserved. Background Roughly 25 % of
More informationA population balance approach for continuous fluidized bed dryers
A population balance approach for continuous fluidized bed dryers M. Peglow, U. Cunäus, C. Kettner, T. Metzger, E. Tsotsas, Thermal Process Engineering, University Magdeburg, 396 Magdeburg, ermany Abstract
More informationAIRLIFT BIOREACTORS. contents
AIRLIFT BIOREACTORS contents Introduction Fluid Dynamics Mass Transfer Airlift Reactor Selection and Design 1 INTRODUCTION airlift reactor (ALR) covers a wide range of gas liquid or gas liquid solid pneumatic
More informationINTRODUCTION TO MULTIPHASE FLOW. Mekanika Fluida II -Haryo Tomo-
1 INTRODUCTION TO MULTIPHASE FLOW Mekanika Fluida II -Haryo Tomo- 2 Definitions Multiphase flow is simultaneous flow of Matters with different phases( i.e. gas, liquid or solid). Matters with different
More informationTypes of Chemical Reactors. Nasir Hussain Production and Operations Engineer PARCO Oil Refinery
Types of Chemical Reactors Nasir Hussain Production and Operations Engineer PARCO Oil Refinery Introduction Reactor is the heart of Chemical Process. A vessel designed to contain chemical reactions is
More informationModule 1: Mole Balances, Conversion & Reactor Sizing (Chapters 1 and 2, Fogler)
CHE 309: Chemical Reaction Engineering Lecture-2 Module 1: Mole Balances, Conversion & Reactor Sizing (Chapters 1 and 2, Fogler) Module 1: Mole Balances, Conversion & Reactor Sizing Topics to be covered
More informationBAE 820 Physical Principles of Environmental Systems
BAE 820 Physical Principles of Environmental Systems Type of reactors Dr. Zifei Liu Ideal reactors A reactor is an apparatus in which chemical, biological, and physical processes (reactions) proceed intentionally,
More informationIDEAL REACTORS FOR HOMOGENOUS REACTION AND THEIR PERFORMANCE EQUATIONS
IDEAL REACTORS FOR HOMOGENOUS REACTION AND THEIR PERFORMANCE EQUATIONS At the end of this week s lecture, students should be able to: Differentiate between the three ideal reactors Develop and apply the
More informationin engineering reactors for catalytic reactions
J. Chem. Sci. Vol. 126, No. 2, March 2014, pp. 341 351. c Indian Academy of Sciences. Engineering reactors for catalytic reactions VIVEK V RANADE Chemical Engineering and Process Development Division,
More informationResidence time distribution and dispersion of gas phase in a wet gas scrubbing system
Korean J. Chem. Eng., 24(5), 892-896 (2007) SHORT COMMUNICATION Residence time distribution and dispersion of gas phase in a wet gas scrubbing system Uk Yeong Kim, Sung Mo Son, Suk Hwan Kang, Yong Kang
More informationChemical Reaction Engineering Prof. Jayant Modak Department of Chemical Engineering Indian Institute of Science, Bangalore
Chemical Reaction Engineering Prof. Jayant Modak Department of Chemical Engineering Indian Institute of Science, Bangalore Lecture No. #40 Problem solving: Reactor Design Friends, this is our last session
More information1. Starting of a project and entering of basic initial data.
PROGRAM VISIMIX TURBULENT SV. Example 1. Contents. 1. Starting of a project and entering of basic initial data. 1.1. Opening a Project. 1.2. Entering dimensions of the tank. 1.3. Entering baffles. 1.4.
More informationMeasurement Technique in Multiphase Flows Dr. Rajesh Kumar Upadhyay Department of Chemical Engineering Indian Institute of Technology, Guwahati
Measurement Technique in Multiphase Flows Dr. Rajesh Kumar Upadhyay Department of Chemical Engineering Indian Institute of Technology, Guwahati Lecture 01 Introduction to Multiphase flow Measurement Techniques
More informationMATHEMATICAL MODELING OF A THREE- PHASE TRICKLE BED REACTOR
Brazilian Journal of Chemical Engineering ISSN 004-663 Printed in Brazil www.abeq.org.br/bjche Vol. 9, No. 03, pp. 567-576, July - September, 0 MATHEMATICA MODEING OF A THREE- PHASE TRICKE BED REACTOR
More informationChemical Reaction Engineering
CHPTE 7 Chemical eaction Engineering (Gate 00). The conversion for a second order, irreversible reaction (constant volume) () k B, in batch mode is given by k C t o ( kcot) (C) k C t o + (D) kcot (B) k
More informationBAE 820 Physical Principles of Environmental Systems
BAE 820 Physical Principles of Environmental Systems Catalysis of environmental reactions Dr. Zifei Liu Catalysis and catalysts Catalysis is the increase in the rate of a chemical reaction due to the participation
More informationRADIOTRACER RESIDENCE TIME DISTRIBUTION METHOD IN DIAGNOSING INDUSTRIAL PROCESSING UNITS: CASE STUDIES
RADIOTRACER RESIDENCE TIME DISTRIBUTION METHOD IN DIAGNOSING INDUSTRIAL PROCESSING UNITS: CASE STUDIES J. Thereska*, E. Plasari** * Institute of Applied Nuclear Physics, Tirana, Albania ** Ecole Nationale
More informationERT 208 REACTION ENGINEERING
ERT 208 REACTION ENGINEERING MOLE BALANCE MISMISURAYA MEOR AHMAD School of bioprocess engineering Unimap Course Outcome No.1: Ability to solve the rate of reaction and their kinetics. objectives DESCRIBE
More informationPOSITION R & D Officer M.Tech. No. of questions (Each question carries 1 mark) 1 Verbal Ability Quantitative Aptitude Test 34
POSITION R & D Officer M.Tech Candidates having M.Tech / M.E. Chemical Engg. with 60% marks (aggregate of all semesters/years) and 50% for SC/ST/PWD are being called for Computer Based Test basis the information
More informationINTRODUCTION TO CATALYTIC COMBUSTION
INTRODUCTION TO CATALYTIC COMBUSTION R.E. Hayes Professor of Chemical Engineering Department of Chemical and Materials Engineering University of Alberta, Canada and S.T. Kolaczkowski Professor of Chemical
More informationChemical Kinetics and Reaction Engineering
Chemical Kinetics and Reaction Engineering MIDTERM EXAMINATION II Friday, April 9, 2010 The exam is 100 points total and 20% of the course grade. Please read through the questions carefully before giving
More informationExperimental methods in catalytic kinetics
Catalysis Today 52 (1999) 133±145 Experimental methods in catalytic kinetics C. Perego *, S. Peratello EniTecnologie S.p.A., Via F. Maritano 26, 20097 S. Donato Milanese, Milan, Italy Abstract Selecting
More informationPhysicochemical Processes
Lecture 3 Physicochemical Processes Physicochemical Processes Air stripping Carbon adsorption Steam stripping Chemical oxidation Supercritical fluids Membrane processes 1 1. Air Stripping A mass transfer
More informationChemical Reactor flnolysis
Introduction to Chemical Reactor flnolysis SECOND EDITION R.E. Hayes J.P. Mmbaga ^ ^ T..,«,,.«M.iirti,im.' TECHNISCHE INFORMATIONSBIBLIOTHEK UNWERSITATSBIBLIOTHEK HANNOVER i ii ii 1 J /0\ CRC Press ycf*
More informationHeterogeneous Catalysis and Catalytic Processes Prof. K. K. Pant Department of Chemical Engineering Indian Institute of Technology, Delhi
Heterogeneous Catalysis and Catalytic Processes Prof. K. K. Pant Department of Chemical Engineering Indian Institute of Technology, Delhi Lecture - 34 Good afternoon, so in the last lecture I was talking
More informationAUTOMOTIVE EXHAUST AFTERTREATMENT
AUTOMOTIVE EXHAUST AFTERTREATMENT CATALYST FUNDAMENTLS Catalyst in its simplest term is a material that increase the rate (molecules converted by unit time) of a chemical reaction while itself not undergoing
More informationOverall volumetric mass transfer coefficient in solid foam packing
Eindhoven University of Technology MASTER Overall volumetric mass transfer coefficient in solid foam packing Veltman, A Award date: 2006 ink to publication Disclaimer This document contains a student thesis
More informationPredicting Continuous Leach Performance from Batch Data
Predicting Continuous Leach Performance from Batch Data An approach to non-ideal reactors and scale- up of leaching systems Presented by Lynton Gormely, P.Eng., Ph.D. The Problem given lab scale batch
More informationTable of Contents. Preface... xiii
Preface... xiii PART I. ELEMENTS IN FLUID MECHANICS... 1 Chapter 1. Local Equations of Fluid Mechanics... 3 1.1. Forces, stress tensor, and pressure... 4 1.2. Navier Stokes equations in Cartesian coordinates...
More informationBAE 820 Physical Principles of Environmental Systems
BAE 820 Physical Principles of Environmental Systems Inter phase mass transfer Dr. Zifei Liu Mass transfer between two phases For a two phase system not at equilibrium (concentrations in the two phases
More informationLECTURE 1D. REACTIONS AND REACTORS
09/11/0 LECTURE 1D. REACTIONS AND REACTORS Before we start developing a systematic approach to the treatment of various reaction systems it is beneficial to learn some pertinent terminology and to get
More informationApplied chemical process
Applied chemical process s Chemical reactor The most important reaction-related factors for the design of a reactor are: 1) The activation principle selected, together with the states of aggregation of
More informationTo increase the concentration of product formed in a PFR, what should we do?
To produce more moles of product per time in a flow reactor system, what can we do? a) Use less catalyst b) Make the reactor bigger c) Make the flow rate through the reactor smaller To increase the concentration
More informationTheories for Mass Transfer Coefficients
Mass Transfer Theories for Mass Transfer Coefficients Lecture 9, 5..7, r. K. Wegner 9. Basic Theories for Mass Transfer Coefficients Aim: To find a theory behind the empirical mass-transfer correlations
More informationModels for Nonideal Reactors
Fogler_Web_Ch18.fm Page 1 Monday, October 9, 017 1:58 PM Models for Nonideal Reactors 18 Success is a journey, not a destination. Ben Sweetland Use the RTD to evaluate parameters. Overview. Not all tank
More informationPRINCIPLES AND MODERN APPLICATIONS OF MASS TRANSFER OPERATIONS
PRINCIPLES AND MODERN APPLICATIONS OF MASS TRANSFER OPERATIONS Jaime Benitez iwiley- INTERSCIENCE A JOHN WILEY & SONS, INC., PUBLICATION Preface Nomenclature xiii xv 1. FUNDAMENTALS OF MASS TRANSFER 1
More informationSteady-State Molecular Diffusion
Steady-State Molecular Diffusion This part is an application to the general differential equation of mass transfer. The objective is to solve the differential equation of mass transfer under steady state
More informationH 0 r = -18,000 K cal/k mole Assume specific heats of all solutions are equal to that of water. [10]
Code No: RR320802 Set No. 1 III B.Tech II Semester Supplementary Examinations, November/December 2005 CHEMICAL REACTION ENGINEERING-I (Chemical Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE
More informationChemical absorption in Couette Taylor reactor with micro bubbles generation by rotating porous plate
2016; 4(4): 38-42 P-ISSN2349 8528 E-ISSN 2321 4902 IJCS 2016; 4(4): 38-42 2016 JEZS Received: 05-05-2016 Accepted: 06-06-2016 Chemical absorption in Couette Taylor reactor with micro bubbles generation
More informationMechanistic model for dispersion coefficients in bubble column
South African Journal of Chemical Engineering, vol. 20, 2015, no. 1, pp 30-43 30 Mechanistic model for dispersion coefficients in bubble column P.J. Skosana a, D.S. van Vuuren a, M.D. Heydenrych b a Materials
More informationChemical Reaction Engineering II Prof. Ganesh Vishwanathan. Department of Chemical Engineering Indian Institute of Technology, Bombay
Chemical Reaction Engineering II Prof. Ganesh Vishwanathan. Department of Chemical Engineering Indian Institute of Technology, Bombay Lecture -17 Packed-bed reactor design Friends, let us look at how to
More informationBasic Concepts in Reactor Design
Basic Concepts in Reactor Design Lecture # 01 KBK (ChE) Ch. 8 1 / 32 Introduction Objectives Learning Objectives 1 Different types of reactors 2 Fundamental concepts used in reactor design 3 Design equations
More informationChemical Reaction Engineering Lecture 5
Chemical Reaction Engineering g Lecture 5 The Scope The im of the Course: To learn how to describe a system where a (bio)chemical reaction takes place (further called reactor) Reactors Pharmacokinetics
More informationStudy on residence time distribution of CSTR using CFD
Indian Journal of Chemical Technology Vol. 3, March 16, pp. 114-1 Study on residence time distribution of CSTR using CFD Akhilesh Khapre*, Divya Rajavathsavai & Basudeb Munshi Department of Chemical Engineering,
More informationTABLE OF CONTENT. Chapter 4 Multiple Reaction Systems 61 Parallel Reactions 61 Quantitative Treatment of Product Distribution 63 Series Reactions 65
TABLE OF CONTENT Chapter 1 Introduction 1 Chemical Reaction 2 Classification of Chemical Reaction 2 Chemical Equation 4 Rate of Chemical Reaction 5 Kinetic Models For Non Elementary Reaction 6 Molecularity
More informationCFD SIMULATION OF SOLID-LIQUID STIRRED TANKS
CFD SIMULATION OF SOLID-LIQUID STIRRED TANKS Divyamaan Wadnerkar 1, Ranjeet P. Utikar 1, Moses O. Tade 1, Vishnu K. Pareek 1 Department of Chemical Engineering, Curtin University Perth, WA 6102 r.utikar@curtin.edu.au
More informationSupplementary Information. The role of copper particle size in low pressure methanol synthesis via CO 2 hydrogenation over Cu/ZnO catalysts
Electronic Supplementary Material (ESI) for Catalysis Science & Technology. This journal is The Royal Society of Chemistry 2014 Supplementary Information The role of copper particle size in low pressure
More informationENZYME SCIENCE AND ENGINEERING PROF. SUBHASH CHAND DEPARTMENT OF BIOCHEMICAL ENGINEERING AND BIOTECHNOLOGY IIT DELHI
ENZYME SCIENCE AND ENGINEERING PROF. SUBHASH CHAND DEPARTMENT OF BIOCHEMICAL ENGINEERING AND BIOTECHNOLOGY IIT DELHI LECTURE 23 STEADY STATE ANALYSIS OF MASS TRANSFER & BIOCHEMICAL REACTION IN IME REACTORS
More informationChapter 7 Mixing and Granulation
Chapter 7 Mixing and Granulation 7.1 Mixing and Segregation (Chapter 9) Mixing vs. segregation (1) Types of Mixture * Perfect mixing Random mixing Segregating mixing Figure 9.1 (2) Segregation 1) Causes
More informationIntegrated Knowledge Based System for Process Synthesis
17 th European Symposium on Computer Aided Process Engineering ESCAPE17 V. Plesu and P.S. Agachi (Editors) 2007 Elsevier B.V. All rights reserved. 1 Integrated Knowledge Based System for Process Synthesis
More informationCOPYRIGHTED MATERIAL OVERVIEW OF CHEMICAL REACTION ENGINEERING*
1 OVERVIEW OF CHEMICAL REACTION ENGINEERING* Chemical reaction engineering (CRE) is the branch of engineering that encompasses the selection, design, and operation of chemical reactors. Because of the
More informationTransient modelling and catalyst deactivation in reaction engineering
Transient modelling and catalyst deactivation in reaction engineering Tapio Salmi, Dmitry Murzin, Johan Wärnå, Esa Toukoniitty, Fredrik Sandelin Åbo Akademi utline Modelling of transient experiments Why
More informationDevelopment of Dynamic Models. Chapter 2. Illustrative Example: A Blending Process
Development of Dynamic Models Illustrative Example: A Blending Process An unsteady-state mass balance for the blending system: rate of accumulation rate of rate of = of mass in the tank mass in mass out
More informationDynamic Modeling of Slurry Bubble Column Reactors
6086 Ind. Eng. Chem. Res. 2005, 44, 6086-6094 Dynamic Modeling of Slurry Bubble Column Reactors Novica Rados, Muthanna H. Al-Dahhan,* and Milorad P. Duduković Chemical Reaction Engineering Laboratory,
More informationChemical Reaction Engineering. Dr. Yahia Alhamed
Chemical Reaction Engineering Dr. Yahia Alhamed 1 Kinetics and Reaction Rate What is reaction rate? It is the rate at which a species looses its chemical identity per unit volume. The rate of a reaction
More informationInstructions for use
A TUBULAR MICRO-REACTOR FOR TitleOF THE KINETICS OF LIQUID PHASE MEASURE HETEROGENEOUS REACTIONS UNDER PRESS Author(s) NONDEK, L. Citation JOURNAL OF THE RESEARCH INSTITUTE F CATALYSIS HOKKAIDO UNIVERSITY,
More informationCoal Water Slurry technology: problems and modeling solutions
Coal Water Slurry technology: problems and modeling solutions A. Fasano, E. De Angelis, A. Mancini, M. Primicerio, F. Rosso (Dept. Math. Univ. Firenze), E. Carniani, Donati, D. Ercolani, A. Terenzi (Snamprogetti,
More informationModel Studies on Slag-Metal Entrainment in Gas Stirred Ladles
Model Studies on Slag-Metal Entrainment in Gas Stirred Ladles Anand Senguttuvan Supervisor Gordon A Irons 1 Approach to Simulate Slag Metal Entrainment using Computational Fluid Dynamics Introduction &
More informationCRYSTALLIZATION AND PRECIPITATION ENGINEERING
CRYSTALLIZATION AND PRECIPITATION ENGINEERING Alan Jones, Rudi Zauner and Stelios Rigopoulos Department of Chemical Engineering University College London, UK www.chemeng.ucl.ac.uk Acknowledgements to:
More informationReal and lab reactors
Real and lab reactors New HDS (hydrodesulfurizer) Unit, ARCO Carson, CA Refinery Fluid Cat Cracker (Chevron) Stacked Fluid Cat Cracker (UOP) Shell Cat-Cracker All-riser Cracking FCC Unit 10/30 female joint
More informationMixing in Chemical Reactors
1 / 131 Mixing in Chemical Reactors Copyright c 2018 by Nob Hill Publishing, LLC The three main reactor types developed thus far batch, continuous-stirred-tank, and plug-flow reactors are useful for modeling
More informationCFD modelling of multiphase flows
1 Lecture CFD-3 CFD modelling of multiphase flows Simon Lo CD-adapco Trident House, Basil Hill Road Didcot, OX11 7HJ, UK simon.lo@cd-adapco.com 2 VOF Free surface flows LMP Droplet flows Liquid film DEM
More informationCHE 611 Advanced Chemical Reaction Engineering
CHE 611 Advanced Chemical Reaction Engineering Dr. Muhammad Rashid Usman Institute of Chemical Engineering and Technology University of the Punjab, Lahore 54590 mrusman.icet@pu.edu.pk 1 Course contents
More informationCHEMICAL ENGINEERING
CHEMICAL ENGINEERING Subject Code: CH Course Structure Sections/Units Section A Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Section B Section C Section D Section E Section F Section G Section H Section I
More informationMass-Transfer-Limited Wet Oxidation of Phenol
Mass-Transfer-Limited Wet Oxidation of Phenol V. TUKAC*, J. VOKÁL, and J. HANIKA Department of Organic Technology, Institute of Chemical Technology, Prague, CZ-166 28 Prague e-mail: vratislav.tukac@vscht.cz
More informationDetermining of the Residence Time Distribution in CPC reactor type
Available online at www.sciencedirect.com Energy Procedia 18 (212 ) 368 376 Determining of the Residence Time Distribution in CPC reactor type Ouassila Benhabiles a*, Nadia Chekir a,walid Taane a a Solar
More informationCalculation of Power, Shear and Gas-liquid mass transfer in reactors for fermentation.
VISIMIX TURBULENT. GAS-LIQUID MIXING. FERMENTATION. Calculation of Power, Shear and Gas-liquid mass transfer in reactors for fermentation. 1. Subject of calculations and initial data. This example demonstrates
More informationPlug flow Steady-state flow. Mixed flow
1 IDEAL REACTOR TYPES Batch Plug flow Steady-state flow Mixed flow Ideal Batch Reactor It has neither inflow nor outflow of reactants or products when the reaction is being carried out. Uniform composition
More informationSD Numerical Simulation Technique for Hydrodynamic Flow Gas-Solids Mixing
SD Numerical Simulation Technique for Hydrodynamic Flow Gas-Solids Mixing Presented by: Irla Mantilla N. irlamn@uni.edu.pe National University of Engineering, Lima - Perú Abstract We formulate a new mathematical
More information