Monte Carlo Simulation of First-Order Diffusion-Limited Reaction within Three-Dimensional Porous Pellets

被引：0

作者：

郭向云

and F.J.Keil

机构：

[1] StateKeyLaboratoryofCoalConversion,InstituteofCoalChemistry,ChineseAcademyofSciences,Taiyuan,China,HamburgUniversityofTechnology,ChemicalReactionEngineering,EissendorferStr,D-,Hamburg,Germany

来源：

Chinese Journal of Chemical Engineering | 2003年 / 04期

关键词：

Monte Carlo method; reaction-diffusion; fractal structure; low-slope asymptote; concentration distribution;

D O I：

暂无

中图分类号：

TQ021 [基础理论];

学科分类号：

081701 ; 081704 ;

摘要：

<正> The Monte Carlo method was employed to simulate diffusion and reaction processes within three-dimensional porous catalyst pellets. The porous pellets used were represented by a Menger sponge and a uniform-pore structure respectively. Results obtained from the fractal pellet showed an intermediate low-slope asymptote in the logarithmic plot of reaction rate and reaction probability. However, the low-slope one did not appear when the reaction occurred within the uniform pellet. Moreover, it was certified that the fractal structure not only generated a new asymptote, but also reduced diffusion resistance of reactants and products.

引用

页码：106 / 110

页数：5