A Monte Carlo model for the sintering of Ni/Al2O3 catalysts

被引：5
作者：
Teixeira, ACSC [1 ]
Giudici, R [1 ]
机构：
[1] Univ Sao Paulo, Polytech Sch, Dept Chem Engn, BR-05508900 Sao Paulo, SP, Brazil
来源：
CHEMICAL ENGINEERING SCIENCE | 2001年 / 56卷 / 03期
基金：
巴西圣保罗研究基金会;
关键词：
nickel catalysts; catalyst deactivation; sintering; steam-reforming; simulation; Monte Carlo;
D O I：
10.1016/S0009-2509(00)00290-6
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
A mathematical model was developed to describe the sintering of nickel crystallites in Ni/Al-2 O-3 catalysts used for steam reforming. Atom migration and particle migration were considered along with many contributions from phenomenological models previously described in the literature. The model combines both mechanisms according to a Monte Carlo approach. Size-dependent surface and interface properties and the influence of surrounding atmosphere and temperature were accomplished. Model predictions qualitatively describe experimentally observed behavior. (C) 2001 Elsevier Science Ltd. All rights reserved.
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页码：789 / 798
页数：10
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