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膜反应器中乙苯脱氢反应的理论分析 被引量:2

ANALYSIS OF DEHYDROGENATION OF ETHYLBENZENE IN MEMBRANE REACTOR
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摘要 本文从化工角度对化学反应与膜分离的动态过程进行了关联,对连续流式膜反应器建立了一维数学模型,并以乙苯脱氢反应为例,对膜反应器的诸多影响因素进行了综合分析.对该反应而言,低水/油比进料和高Da值操作,都有利于膜反应器效果的提高;膜的选择分离性能越好,转化率也随之增加.对膜反应器的结构进行了重点分析,发现催化剂床层高度与膜长及膜放置位置之间存在着一个最佳匹配关系,从理论上说明了前期工作的实验结果. one-dimensional mathematical model was developed and solved for the catalytic dehydrogenation of ethylbenzene to styrene in a continuous plug flow membrane reactor (PBMR) on the basis of some theoretical assumptions. The theoretical simulation showed that higher Da number (ratio of maximum reaction rate to feed rate), higher permselectivity of the membrane, and lower ratio of water to ethylbenzene in feed composition without consideration of carbon deposit will be favorable to conversion increment. In order to further evaluate the influence of membrane reactor configurations on the dehydrogenation of ethylbenzene in porous alumina membrane reactor, two types of membrane reactor have been constructed: structure Ⅰ constructing reaction and separation in the same space; structure Ⅱ including two parts, i. e., reaction prior to separation, reaction and separation. For s.tructure Ⅱ, the theoretical simulation showed that the reactant loss, which was typical in structure Ⅰ, was effectively reduced, and the performance of the membrane reactor was superior to that of the fix bed reactor within a wide range of permeation rates (pvr= 0~6. 8). The results of theoretical simulation also showed that there was an optimum location of the membrane, and an optimum permeation area of the membrane for structure Ⅱ.
出处 《Chinese Journal of Catalysis》 SCIE CAS CSCD 北大核心 1995年第6期487-493,共7页 催化学报(英文)
基金 国家自然科学基金
关键词 膜反应器 乙苯 脱氢 微孔氧化铝膜 embrane reactor, mathematical model, ethylbenzene,dehydrogenation, alumina membrane
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参考文献3

  • 1Yang Weishen,Catal Today,1995年,25卷,315页
  • 2邬继成,硕士学位论文,1992年
  • 3Sun Y M,Ind Eng Chem Res,1990年,29卷,232页

同被引文献8

  • 1Wu C S,Gerdes T E,Pszczolkowski J L,et al.Dehydrogenation of ethylbenzene to styrene using commercial ceramic membranes as reactors.Sep.Sci.Technol.,1990,25(13/14/15):1489-1510
  • 2She Y,Han J,Ma Y H.Palladium membrane reactor for the dehydrogenation of ethylbenzene to styrene//4th International Conference of Catalysis in Membrane Reactors.Zaragoza,Spain,2000:61-62
  • 3Li Yongsheng(李永生).Studies on synthesis and permeability of ZSM-5 zeolite membrane[D].Dalian:Dalian University of Technology,2000.
  • 4Gallaher G R,Gerdes J T E,Liu R K T.Experimental evaluation of dehydrogenations using catalytic membrane processes.Sep.Sci.Technol.,1993,28(1/2/3):309
  • 5Yan Y,Davis M E,Gavalas G R.Preparation of ZSM-5 membrane by in-situ crystallization on porous α-Al2O3.Ind.Eng.Chem.Res.,1995,34:1652-1661
  • 6夏长荣,王亭,张卉,杨萍华,孟广耀,彭定坤.乙苯脱氢多孔膜反应器的研究[J].石油化工,1998,27(2):95-99. 被引量:5
  • 7许中强,陈庆龄,卢冠忠.膜反应器在乙苯脱氢反应中的应用[J].石油化工,1999,28(6):358-360. 被引量:8
  • 8张雄福,王金渠.沸石分子筛膜的合成与应用研究进展[J].石油化工,1999,28(4):266-270. 被引量:17

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