( Super2 critical Fluid, SCF) SCF SCF, ( Supercritical, Fluid Extraction, SFE), , SFE CO 2 SFE

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1 13 ( ) : CO MPa : 25MPa m 3 / h 4 5h : % % : ; ; : TQ 028 : A : (2002) ( Super2 critical Fluid SCF) SCF : ; ; ; [5 ] p T ( Supercritical Fluid Extraction SFE) 7 SCF ] SFE SFE 1. 2 CO 2 SFE 1 [1 4 ] 1 1L 1L 0. 3L CO % ( Hippophae rhamnoides L. ) CO 2 [6 : (1964 )

2 mm 4mm CO 2 ; CO 2 CO CO m 3 / h 1 - CO 2 ; 2 - ; 3 - ; 4 - ; 5 - ; 6 - ; 7 - ; ; 10-1 Fig. 1 Schematic diagram of experimental apparatus 100g 15 25MPa 25MPa : CO 2 P2R 5 25MPa [ 6 ] 10 30MPa 25MPa [6 ] Fig. 3 Effects of pressure on the extraction efficiency 2 Fig. 2 Effects of temperature on the extraction efficiency ] [4 30MPa

3 15 4 Fig. 4 Effects of particle size on the extraction efficiency g ( [5 ] 45 %) 4h ; 150g ( 75 %) 4h Fig. 6 Effects of operating time on the extraction efficiency 1 75 % 80 % Tab. 1 Fatty acids composition of the Hippophae rhamnoides L. seed oil % % 5 Fig. 5 Effects of filling quantity on the extraction efficiency : 6 25MPa SCF CO m 3 / h m 3 / h 4 [8 ] 5h CO CO 2 ; min 38

4 (4) 3 (1) ; 2 : (2) [1 ]. [J ] (4) : [2 ]. [J ] (4) : [3 ]. [J ] (2) : [4 ] Xie M Tan K C Goh K H. Optimum prioritization (3) 23 and resource allocation based on fault tree analysis [J ]. 23 International Journal of Quality & Reliability Manage2 ment (2) : [5 ] Mechanical Engineering Publications. Reliability of Me2 chanical System 2nd edtion. U K [6 ] GB [ S] : [ 1 ] Sovova H Kucera J Jez J. Rate of the vegetable oil ex2 traction with supercritical carbon dioxide. Ex2 traction of grape oil [J ]. Chem Engng Sci : [ 2 ] Perrut M Clavier J Y Poletto M et al. Mathematical modeling of sunflower seed extraction by supercritical CO 2 [ J ]. Industrial & Engineering Chemistry Re2 search (2) : [3 ]. CO 2 [8 ] Puiggene J et al. Free liquid2to2supercritical fluid mass [J ] (6) : [4 ]. CO 2 [J ] (5) : [5 ]. [ J ] ( 1 ) : [6 ]. [ P]. : CN [7 ]. [J ] : transfer in packed beds [J ]. Chem Eng Sci (2) :

5 ABSTRACT 1 Max well2stefan Equation and Its Application in Multicomponent Interphase Mass Transfer Wang Wei2de 1 2 (1. Depart ment of Chemical Engineering Huaqiao U niversity Quanzhou Fujian Province China ; 2. Chemical Engineering Research Instit ute Tianjin U niversity Tianjin China) Abstract : The mass t ransfer process of multicomponent system is completely different f rom t hat of a simple binary system. Due to the diffusion interactions between different components on the mass transfer process the efficiencies of species in a multicomponent system are not the same changing between -. In some cases some species appear osmotic diffusion reverse diffusion or diffusion barrier. The traditional Fick s 1aw can not explain these phenomena and it is necessary to explain them by Maxwell2Stefan equations which can provide t he most general and convenient approach for describing multicomponent mass t ransfer. A review is given to t he derivation of Maxwell2Stefan equations t heir solution and t heir application to interp hase mass t ransfer in mu1ticomponent systems. Keywords : multicomponent system ; mass t ransfer process ; Maxwell2Stefan equation ; diff usion coefficient Experimental Research of Hippophae Rhamnoides L. Seed Oil with Supercritical Fluid Extraction YIN Jian2zhong SUN Xian2wen L I Zhi2yi DING Xin2wei (Dalian U niversity of Technology Dalian Liaoning Province China) Abstract : A set of experimental device which was used for supercritical fluid extraction of seed oil was developed. Extraction of oil from crushed Hippophae Rhamnoides L. seeds with supercritical CO 2 was performed over the pressure range of l5 30MPa and temperature range of on a laboratory apparatus. The effects of operating parameters such as pressure temperat ure graininess weight f raction and ext raction time on t he oil yield have been investigated and t he optimum processing parameters were obtained. The result showed t hat t he higher extraction rate could be obtained at a pressure of 25MPa and a temperature of 40. The ext raction time was 4 5h when flow is 0. 2m 3 / h. Composition analysis showed the content of unsaturated fatty acids % and saturated fatty acids %. Keywords : supercritical fluid ext raction ; Hippop hae Rhamnoides L. seed oil ; experimental research Heat Transfer Calculation and Analysis f or Thermodynamic Supercritical Fluids L IU Jun WANG Tao SHEN Zhong2yao (Depart ment of Chemical Engineering Tsinghua U niversity Beijing l00084 China) Abstract : Supercritical fluid process is one of newly2developed chemical technologies. Heat t ransfer is very