费托合成油品体系相关二元物系汽液平衡预测方法的评价  

Evaluation of vapor-liquid equilibrium prediction methods for related binary systems of Fischer-Tropsch synthesis oil system

作　　者：董立华[1,2] 郝栩[1] 曹立仁[1] 李永旺[1] 

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原030001 [2]中国科学院研究生院,北京100039

出　　处：《化工学报》2009年第6期1367-1372,共6页CIESC Journal

基　　金：国家自然科学基金重大项目(20590361)~~

摘　　要：Two alpha functions(BM,SRW) and three different mixing rules(MHV2,WS,HG) for the PR and RKS-EOS were investigated in the vapor-liquid equilibrium calculation of related binary systems for Fischer-Tropsch synthesis oil system.Furthermore,two different equations of states(EOS) of SR-POLAR and PC-SAFT,together with two activity coefficient equations of UNIF-DMD and UNIF-HOC were investigated.The results showed that various prediction methods had similar deviations for weakly polar systems.However,these method had different prediction abilities for other systems.UNIF-DMD,RKS-HG and RKS-MHV2 models gave more accurate prediction for non-associating strongly polar system,RKS-MHV2 and UNIF-HOC models showed the smallest deviation for associating strongly polar system containing water,UNIF-HOC and SR-POLAR models showed the smallest deviation for associating strongly polar system containing acids,and UNIF-HOC,SR-POLAR models showed the smallest deviation for other associating strongly polar systems,while RKS-MHV2 and RKS-HG took the second place.PC-SAFT model would bring big deviation for unsymmetrical system when binary parameters were lacking,but would give small deviation for all systems when binary parameters were available.Two alpha functions （BM, SRW） and three different mixing rules （MHV2, WS, HG） for the PR and RKS-EOS were investigated in the vapor-liquid equilibrium calculation of related binary systems for Fischer-Tropsch synthesis oil system. Furthermore, two different equations of states （EOS） of SR-POLAR and PC-SAFT, together with two activity coefficient equations of UNIF-DMD and UNIF-HOC were investigated. The results showed that various prediction methods had similar deviations for weakly polar systems. However, these method had different prediction abilities for other systems. UNIF-DMD, RKS- HG and RKS-MHV2 models gave more accurate prediction for non-associating strongly polar system, RKS-MHV2 and UNIF-HOC models showed the smallest deviation for associating strongly polar system containing water, UNIF-HOC and SR-POLAR models showed the smallest deviation for associating strongly polar system containing acids, and UNIF-HOC, SR-POLAR models showed the smallest deviation for other associating strongly polar systems, while RKS-MHV2 and RKS-HG took the second place. PC-SAFT model would bring big deviation for unsymmetrical system when binary parameters were lacking, but would give small deviation for all systems when binary parameters were available.

关 键 词：费托合成 汽液平衡 状态方程 α函数 混合规则 活度系数方程 

分 类 号：TQ013.1[化学工程]