[1]肖国民,张进.丙醛与氨气固相环合催化反应机理的研究[J].东南大学学报(自然科学版),2001,31(5):80-84.[doi:10.3969/j.issn.1001-0505.2001.05.018]
 Xiao Guomin,Zhang Jin.Study on the Reaction Mechanistic of Vapor Phase[J].Journal of Southeast University (Natural Science Edition),2001,31(5):80-84.[doi:10.3969/j.issn.1001-0505.2001.05.018]
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丙醛与氨气固相环合催化反应机理的研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
31
期数:
2001年第5期
页码:
80-84
栏目:
化学化工
出版日期:
2001-09-20

文章信息/Info

Title:
Study on the Reaction Mechanistic of Vapor Phase
作者:
肖国民 张进
东南大学化学化工系, 南京 210096
Author(s):
Xiao Guomin Zhang Jin
Department of Chemistry and Chemical Engineering, Southeast University, Nanjing 210096, China)
关键词:
丙醛 催化 氨气 环合
Keywords:
propionaldehyde catalyst ammonia cyclocondensation
分类号:
O621.251
DOI:
10.3969/j.issn.1001-0505.2001.05.018
摘要:
在固定床反应器中,研究了丙醛与氨环合的反应动力学特性.研究结果表明,当催化剂粒度小于0.8 mm时,内扩散影响可以排除,当气体流速W/FA0<3.6时,外扩散影响可以排除.提出了简化的丙醛气相环合动力学模型,实验值和计算值基本相符,反应级数为一级.反应速率表达式为(-γA)w=83.45exp(-14.55/RT)CA.提出了3种机理模型假设,根据实验数据拟合的结果,认为模型2的假设可以合理地解释实验现象.研究了固定床催化反应模型,假定为拟一维模型,研究了丙醛转化率与床层高度之间的关系,可供工业固定床反应器设计参考.
Abstract:
The reaction kinetics of cyclocondensation of propionaldehyde and ammonia of 2-ethyl-3,5-dimethylpyridine are studied on a fixed-bed reactor. The study shows that the effect of inner diffuse can be neglected when the catalyst particle is smaller than 0.8 mm and the effect of exterior diffuse can be neglected when  W/FA0 is smaller than 3.6. A rate equation of vapor phase cyclocondensation of propionaldehyde is obtained as follows: (-γA)w=83.45exp(-14.55/RT)CA. The three mechanistic models are proposed. On the basis of curve fitting, the second model is considered to be the proper one to explain the experiment results. The relation between the conversation of propionaldehyde and the height of fixed bed is investigated on the assumption of one-dimension quasi-stability model, which can be used for design of commercial fixed-bed reactor.

参考文献/References:

[1] 肖国民,孔祥翔.气相法合成2-乙基3,5-二甲基吡啶的研究.化工时刊,1999(10):27~31
[2] 肖国民,吴平东.丙醛气相环合反应动力学.化学反应工程与工艺,1997(2):194~197
[3] Froment Gibert F,Bischoff Kenneth B.Chemical reactor analysis and design.New York:Chichester Brisbane Tornoto,1979.128~170
[4] 斯图尔特.沃伦著.有机合成.丁新腾译.上海:上海科学技术文献出版社,1986.85~99
[5] Fable J,Weitkamp H,Korte U F.Study of the kinetics and mechanism of combined dehydrogenation of Alkylpridine.Tetrahedron Letters,1965,31:2677~2681
[6] Adams C R,Fable J.Alkylpridine durch katalytische gasphasan reaktion.Brennstoff Chemie,1966,47:184~190
[7] Liepinya I M,Sile M K,Avots A.Sutdies of vapor phase synthesis of pyridine bases on nonsteady state catalyst.React Kinet Catal Lett,1984,26:123~126
[8] 肖国民.2,3,5-三甲基吡啶的合成:[学位论文].浙江:浙江大学化工系,1996

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备注/Memo

备注/Memo:
作者简介:肖国民,男,1967年生,博士,副教授.
更新日期/Last Update: 2001-09-20