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The coupling effect of the thermodynamic swelling process in pervaporation
Ren, JZ; Jiang, CZ
KeywordCoupling Effect Activity Coefficient Chitosan Membrane H2so4 Crosslinking Chitosan Membrane Water-ethanol Mixture
Source PublicationJOURNAL OF MEMBRANE SCIENCE
1998-03-18
Volume140Issue:2Pages:221-233
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
WOS SubjectEngineering, Chemical ; Polymer Science
WOS Research AreaEngineering ; Polymer Science
WOS KeywordSEPARATION ; MEMBRANE ; MIXTURE ; PERMSELECTIVITY ; PERMEABILITY ; POLYMER
AbstractIn order to analyze the coupling effect in thermodynamic swelling process, the relationship between the activity and volume fraction of each component within membrane was defined as alpha(i)(m) = gamma(i)(m) phi(i)(m). The concept of reference state in thermodynamic swelling process which only considered the interaction between individual component and membrane matrix was also set up. The difference of activity coefficient of each component within the membrane from reference state reflected the contribution of coupling effect to thermodynamic swelling process. For chitosan and H2SO4 crosslinking chitosan membrane the influence of coupling effect on selectivity of H2O in thermodynamic swelling process could be described from distribution coefficients and competition distribution coefficients of H2O and EtOH successfully. The interaction between H2O and the membrane matrix dominated the activity coefficient of H2O within the membrane, and the coupling effect between H2O and EtOH within the membrane only had a little influence on the activity coefficient of H2O. However, the activity coefficient of EtOH was dominated strongly by the coupling effect between H2O and EtOH within the membrane. This was attributed to the large amount of H2O present in the membrane. The distribution coefficient of EtOH, k(2)(m) and competition distribution coefficient of membrane k(12)(m) directly determined the selectivity of H2O in thermodynamic swelling process and the coupling effect between H2O and EtOH within the membrane had a negative influence on the selectivity of H2O within the membrane. (C) 1998 Elsevier Science B.V.
Language英语
WOS IDWOS:000072451700007
Citation statistics
Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/138141
Collection中国科学院大连化学物理研究所
AffiliationChinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Ren, JZ,Jiang, CZ. The coupling effect of the thermodynamic swelling process in pervaporation[J]. JOURNAL OF MEMBRANE SCIENCE,1998,140(2):221-233.
APA Ren, JZ,&Jiang, CZ.(1998).The coupling effect of the thermodynamic swelling process in pervaporation.JOURNAL OF MEMBRANE SCIENCE,140(2),221-233.
MLA Ren, JZ,et al."The coupling effect of the thermodynamic swelling process in pervaporation".JOURNAL OF MEMBRANE SCIENCE 140.2(1998):221-233.
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