摘要
活性组分非均匀分布催化剂颗粒,与均匀分布者相比,常可给出较高的活性、选择性和抗毒稳定性.截止到1986年有关这一领域的理论和实验研究文献,Doughety和Verykios已作了极好的综合评述,但除Juang和Weng外,未能论及我国其它学者的工作.本文主要对有关非均匀活性分布催化剂颗粒内部行为的文献进行综述,内容包括等温、非等温条件下单一和复杂反应网络的理论模型、实验研究,以及重点放在解析法方面的活性分布最优化.从文献的来源讲,也述评了我国学术界的工作以及直到1989年在这一领域的最新成果.文章试图对文献中见到的点速率常数和活性分布表达式加以整理,并给出一种适用于任意单一或复杂反应网络的通用理论模型方程.对Thiele模数的形式也作了一般化.
Catalyst particles with nonuniform activity distribution may exhibit higher activity, selectivity and improved poison and deactivation stability as com-pared with those which uniform distribution. Theoretical and experimental work in this area prior to 1986 has been reviewed by Dougherty and Verykios, but expect Juang and Weng, the papers of Chinese scientists have not been included.
In this paper, the literatures on the intra-particle behavior of nonuni-formly distributed catalysts are reviewed, covering the theoretical models of single and complex reaction networks under isothermal and nonisothermal conditions, experimental studies and analytical approach of activity profile optimization. Papers of Chinese authors and more recent achievements up to 1989 are also reviewed. The review tries to systematize the expressions of local rate constant and activity distribution used in the literature, and give a general theoretical model which can be applied to any single or complex reaction network the Thiele modulus is also expressed in a generalized form.
出处
《化工学报》
EI
CAS
CSCD
北大核心
1990年第5期590-608,共19页
CIESC Journal
