Conductive Activation Carbon Monoliths Prepared Directly from Brown Coal Applications in Gas and Liquid Adsorption
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1 Conductive Activation Carbon Monoliths Prepared Directly from Brown Coal Applications in Gas and Liquid Adsorption Mehrdad Parsa, Emma Qi, Alan. L. Chaffee School of Chemistry 12 th ECCRIA 5-7 Sept, Cardiff
2 Activated Carbon Activated carbons: usually powder or granulated Bed reactors issues: agglomeration particle entrainment maldistribution plugging high pressure drop Carbon honeycomb monolith : a structured activated carbon 1
3 Carbon honeycomb monolith Coated monoliths Synthetic cordierite Carbon coated cordierite Integral monoliths Uniform structure throughout Features : high void fraction (reduces the pressure drop) large surface area high mass transfer rate regenerable
4 Integral Carbon Honeycomb Monoliths Finding suitable precursors: Furanic resins Acetone resin Phenolic (resole and novolac) resins Furfuryl alcohol resins Reducing production cost
5 Victorian Brown Coal as Carbon Precursor Coal moisture content: ~ 60% (wb) Loy Yang Mine and Power Stations Advantages Soft texture Low inorganic & mineral content (very low non-functional inorganic fraction) Low nitrogen and sulfur contents Significantly Cheaper, relative to resin precursors & high-rank coals.
6 Patented Honeycomb Carbon Monoliths from Brown Coal Prepared by extrusion Carbonisation Activation Australian Provisional Patent AU
7 VBC Honeycomb Carbon Monoliths 1. Vergunst, T., F. Kapteijn, and J.A. Moulijn, Preparation of carbon-coated monolithic supports. Carbon, (11): p Liu, L., et al., Preparation of activated carbon honeycomb monolith directly from coal. Carbon, (8): p
8 Tuning the Monolith Properties Pore size Microporosity Mesoporosity Electrical conductive High surface area Easy to fabricate Light weight and high-strength Regenerable Electrical conductivity Surface area Surface functionality 13
9 Facilitates Electrical Swing Adsorption (ESA) Pore size Microporosity Mesoporosity Electrical conductive High surface area Easy to fabricate Light weight and high-strength Regenerable Electrical conductivity Surface area Electrical swing adsorption (ESA) resembles thermal swing adsorption (TSA) faster heating/cooling cycles higher productivity concentration &quick recovery of adsorbates Surface functionality 13
10 Tuning the Monolith Properties Tuning Conductivity Carbonised Carbonised, treated Activated 10
11 Tuning the Monolith Properties Tuning Conductivity Carbonised Carbonised, treated Activated Tuning Strength 11
12 Tuning the Monolith Properties Tuning Conductivity Carbonised Carbonised, treated Activated Tuning Strength Tuning Porosity 12
13 Decomposition of H 2 O 2 Oxidation of organics with Ozone (O 3 ) Applications CO 2 Capture Catalyst Organics removal e.g. Phenol Methane purification and storage Dioxin removal Volatile organic carbon Gas-phase adsorption Carbon Monolith Liquidphase adsorption Recovery of I 2 Adsorption of inorganics e.g. P, Ar, Cr and Hg Blood cleansing Li secondary battery Supercapacitor Electrode materials Catalyst support Selective reduction of NOx and SOx Automobile exhaust treatment
14 Amount Adsorbed (mmol/g) Amount Adsorbed (mmol/g) Active Carbon Monoliths from VBC for CO 2 Capture CO 2 adsorption isotherms Pressure (torr) VBC Monolith 273 K 304 K 306 K 323 K 344 K N 2 adsorption isotherms Pressure (torr) 273 K 304 K 323 K 344 K VBC Monolith Australian Patent Application AU
15 Amount Adsorbed (mmol/g) Amount Adsorbed (mmol/g) Active Carbon Monoliths from VBC for CO 2 Capture CO 2 adsorption isotherms Pressure (torr) VBC Monolith 273 K 304 K 306 K 323 K 344 K 2.5 N 2 adsorption isotherms CO 2 Partial pressure swing adsorption (PPSA), 20 o C Pressure (torr) 273 K 304 K 323 K 344 K VBC Monolith
16 CO 2 uptake (mmol/g) CO 2 Adsorption (IGA system) o C CO 2 Isotherm Pressure (mbar) Samples Brown coal derived activated carbon monolith Poly(benzoxazine-coresol)-based activated carbon monoliths Phenolic resin derived activated carbon monoliths Polypyrrole-derived activated carbons Nanoporous benzimidazole-linked nanofibers Adsorption capacity at 25 o C (mmol/g), 0.15 bar 1 bar 5 bar Surface area (m 2 /g) Ref [1] [2] [3] [4] [1] G.-P. Hao, W.-C. Li, D. Qian, G.-H. Wang, W.-P. Zhang, T. Zhang, A.-Q. Wang, F. Schüth, H.-J. Bongard, A.-H. Lu, Structurally Designed Synthesis of Mechanically Stable Poly(benzoxazine-co-resol)-Based Porous Carbon Monoliths and Their Application as High-Performance CO 2 Capture Sorbents, Journal of the American Chemical Society, 133 (2011) [2] Y. Jin, S.C. Hawkins, C.P. Huynh, S. Su, Carbon nanotube modified carbon composite monoliths as superior adsorbents for carbon dioxide capture, Energy & Environmental Science, 6 (2013) [3] M. Cox, R. Mokaya, Ultra-high surface area mesoporous carbons for colossal pre combustion CO 2 capture and storage as materials for hydrogen purification, Sustainable Energy & Fuels, 1 (2017) [4] M.G. Rabbani, A.K. Sekizkardes, O.M. El-Kadri, B.R. Kaafarani, H.M. El-Kaderi, Pyrene-directed growth of nanoporous benzimidazole-linked nanofibers and their application to selective CO 2 capture and separation, Journal of Materials Chemistry, 22 (2012)
17 Active Carbon Monoliths and ESA CO2 ads / des for pelletised CMK-3 carbon CO2 ads weight (%) CMK-3-NH2 CMK-3-NH2 pellet (powder) CMK-3-NH2 pellet (pellet) Temperature Temperature (celcius) Time (minutes) 0 Monolithic carbons can capture CO 2 and then be regenerated by Electrical Swing Adsorption (ESA) This previous work involved expensive precursor materials and/or processing methods VBC derived adsorbents are now prospective for CO 2 capture and many other applications. Heat is not wasted in regeneration S Delaney, PhD Thesis, Monash University, 2009
18 Ce/qe Phosphorous adsorption y = x R² = Ce Samples Brown coal derived activated carbon monolith Activated carbon (made from soaking sugarcane bagasse) Commercial Activated carbons Adsorption capacity (mg/g) 3.48 Ref 1.19 [1] 1.56 [2] 3 18 [1]. Liang, M.N., et al., Adsorption Removal of Phosphorus from Aqueous Solution by the Activated Carbon Prepared from Sugarcane Bagasse. Advanced Materials Research, : p [2]. Boki, K., et al., Phosphate Removal by Adsorption to Activated Carbon. Nippon Eiseigaku Zasshi (Japanese Journal of Hygiene), (3): p
19 Phenol adsorption C e /q e CM4-Langmuir isotherm-phenol C e Code HM type Activation Adsorption capacity Q m (mg/g) CM1 1 Condition A 20 CM2 2 Condition A 48 CM3 1 Condition B 128 CM4 2 Condition B 159 MAST AC Commercial 114 HM AC Gomes (Appl. Surf. Sci., ) Yam (Desalin. Water Treat., ) Teoh (Desalin. Water Treat., ) Yoshida (Adsorption 2016 Preprint) Source Present study Literature 19
20 Methylene blue dye removal g/l catalyst, 480 mmol/l H 2 O 2, 50 mg/l MB at ph = 6 and 15 o C Powder 0.8 C/C time (min) Rate constant = 0.14 min -1 Decoloration efficiencies. 95% after 20 min 20
21 Methylene blue dye removal Rate constant = 0.14 min -1 Catalyst ph Catalyst (g/l) Fe 3 O 4 /carbon octahedra MB mg/l H 2 O 2 mmol/l k min Fe 3 O 4 /CeO CuFe 2 O 4 /Cu@C reduced 3. CuFe 2 O 4 2 FNC This study 21 Ref Fe 3 O Fe 3 O 4 /SiO 2 /C Fe 3 O 4 /TiO 2 /C
22 Methylene blue dye removal Monolith incorporates catalyst 22
23 Conclusions Victorian brown coal derived activated carbon honeycomb monoliths can be tuned/optimised for various application. Surface area and pore size distribution can be tuned Compressive strength and electrical conductivity of monoliths can be tuned Regeneration can be achieved by electrical swing adsorption (ESA) Activated carbon monoliths exhibit good performance for CO 2, H 2 and CH 4 adsorption relative to commercial and literature reported materials. Activated carbon monoliths showed exceptional phenol adsorption, good phosphorus adsorption, effective dye adsorption Activated carbon monoliths show exception organic removal by catalysed (Fentontype) oxidation Looking to demonstrate other applications such as catalysis, electrode materials, etc
24 Thank you for listening! Acknowledgements Environmental Clean Technologies (ECT)\ Brown Coal Innovation Australia MATESA (EU project) IKTS Fraunhofer, Dresden, Germany
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