建立了一个间歇反应器内酯化反应与渗透汽化集成过程的数学模型,用于描述反应和脱水同时进行的过程.该模型考虑了反应体系中所有组分的渗透量影响以及混合物的非理想热力学行为.选择乙酸和正丁醇生成醋酸丁酯的酯化反应与PVA膜渗透汽化集成过程为研究体系,将模型结果与文献中已报道的实验数据进行对比,验证了该模型的有效性.结果表明,采用渗透汽化脱除酯化反应的水分将提高酯的产率.对温度、反应物初始比、膜面积与反应体积比以及催化剂浓度几种操作条件对集成过程性能影响进行了参数的分析.根据结果讨论得到该膜过程与反应集成过程的优化操作条件.
A mathematical model for esterification in a batch reactor coupled with pervaporation to describe a simultaneous reaction and water removal from the reactor was developed. The permeation of all components in the reaction mixture and their non-ideal thermodynamic behavior were taken into account. The esterification of acetic acid with n-butanol for the production of n-butyl acetate integrated with a poly(vinyl alcohol) pervaporation membrane was selected as the model system for this study. The validity of the model was tested by comparing the calculated results with experimental data reported in the literature. The results show that the esterification is facilitated by water removal using pervaporation, which accelerates the rate of ester formation. A parametric study was carried out to evaluate the effects of operating conditions on the performance of the pervaporation-coupled esterification reactor and this included temperature, initial composition of the reactants, membrane area relative to the reactor's size, and catalyst concentration. Based on these results, suitable operating conditions for the membrane-integrated reaction process are discussed.
参考文献
| [1] | Lipnizki F;Field R W;Ten P K .[J].Journal of Membrane Science,1999,153:183. |
| [2] | Feng X S;Huang R Y M .[J].Industrial and Engineering Chemistry Research,1997,36:1048. |
| [3] | Liu, K;Feng, X;Tong, ZF;Li, L .Removal of trace water from organic mixtures by pervaporation separation during butyl acetate production via esterification[J].Separation Science and Technology,2005(10):2021-2033. |
| [4] | Liao A P;Tong Z F .[J].Chem React Eng Technol,1995,11:406. |
| [5] | Yan J M;Chen G W .[J].Membrane Science and Technology,2002,22(05):6. |
| [6] | Liu K;Tong ZF;Liu L;Feng XS .Separation of organic compounds from water by pervaporation in the production of n-butyl acetate via esterification by reactive distillation[J].Journal of Membrane Science,2005(1/2):193-201. |
| [7] | David M O;Gref R;Nguyen T Q;Neel J .[J].Chemical engineering Research and Design,1991,69(A):335. |
| [8] | Feng XS.;Huang RYM. .STUDIES OF A MEMBRANE REACTOR - ESTERIFICATION FACILITATED BY PERVAPORATION[J].Chemical Engineering Science,1996(20):4673-4679. |
| [9] | Xu Z L;Qu R;Shi Y J;Yu J L .[J].Membrane Science and Technology,1996,16(02):58. |
| [10] | Krupiczka R;Koszorz Z .[J].Sep PurifTechnol,1999,16:55. |
| [11] | Li X H;Wang L .[J].Journal of Membrane Science,2001,186:19. |
| [12] | Liu QL.;Chen HF. .Modeling of esterification of acetic acid with n-butanol in the presence of Zr(SO4)(2)center dot 4H(2)O coupled pervaporation[J].Journal of Membrane Science,2002(2):171-178. |
| [13] | Zhu YS.;Chen HF. .Pervaporation separation and pervaporation-esterification coupling using crosslinked PVA composite catalytic membranes on porous ceramic plate[J].Journal of Membrane Science,1998(1):123-134. |
| [14] | Liu Q L;Zhang Z B;Chen H F .[J].Journal of Membrane Science,2001,182:173. |
| [15] | Grob S;Hasse H .Reaction kinetics of the homogeneously catalyzed esterification of 1-butanol with acetic acid in a wide range of initial compositions[J].Industrial & Engineering Chemistry Research,2006(6):1869-1874. |
| [16] | Sanz M T;Gmehling J .[J].Chemical Engineering Journal,2006,123:9. |
| [17] | Feng X S;Huang R Y M .[J].Journal of Membrane Science,1996,118:127. |
| [18] | Qi R H;Henson M A .[J].Computers and Chemical Engineering,2000,24:2719. |
| [19] | Fredenslund A;Jones R L;Prausnitz J M .[J].AICHE Journal,1975,21:1086. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%