化学
铑
催化作用
甲烷
二氧化碳
扩散
一氧化碳
弹丸
碳纤维
合成气
填充床
化学工程
催化重整
二氧化碳重整
分析化学(期刊)
热力学
有机化学
色谱法
材料科学
复合材料
物理
工程类
复合数
作者
James T. Richardson,S.A. Paripatyadar
出处
期刊:Applied Catalysis
[Elsevier]
日期:1990-05-01
卷期号:61 (1): 293-309
被引量:466
标识
DOI:10.1016/s0166-9834(00)82152-1
摘要
Rhodium supported on γ-Al2O3 was an effective catalyst for reforming methane with carbon dioxide at low ratios of CO2/CH4. Unlike other metals tested, no carbon deposited on the catalyst in the temperature range 600–800°C. Kinetic experiments on a 0.5 wt.-% Rh/Al2O3 catalyst gave rate equations for the reforming and shift reactions. A model was constructed for conversion in a pellet by incorporating both the reverse reaction and the effect of external and internal diffusion. This model, when tested with the data from a pellet string reactor, gave very good agreement with conversions and product distributions. External diffusion was negligible but internal effectiveness factors were about 0.3 or more. The model was expanded to a large-scale packed bed with appropriate heat transfer parameters. Adjustable factors were determined by matching measured temperature profiles from pilot unit experiments. The catalyst later performed successfully in a solar receiver/reactor and shows potential for conventional processing.
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