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.
出处
《化工学报》
EI
CAS
CSCD
北大核心
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)~~
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
Fischer-Tropsch synthesis
vapor-liquid equilibrium
equation of state
alpha function
mixing rules
activity coefficient equation
