Kinetics of catalytic oxidation of oxygenated fuels on Pt/ZSM-5 catalyst

催化作用 ZSM-5型 化学 动力学 化学工程 有机化学 沸石 物理 量子力学 工程类
作者
Yanyi Yao,Weijuan Yang,Xing Zhang,Xiaoyu Zhu,Jun Cheng,Junhu Zhou
出处
期刊:Combustion Theory and Modelling [Taylor & Francis]
卷期号:26 (4): 728-745 被引量:1
标识
DOI:10.1080/13647830.2022.2063194
摘要

To build a set of complete kinetic parameters of oxygenated fuels kinetic model on Pt catalyst, methanol was used as an example to carry out the catalytic oxidation kinetics experiment of oxygenated fuels on Pt/ZSM-5 catalyst. The Power law model and Langmuir–Hinshelwood (L–H) model were established to characterise the catalytic oxidation reaction of methanol. Then the oxidation kinetics of methanol, ethanol, dimethyl ether (DME) and n-butanol on Pt/ZSM-5 was studied under the same experimental conditions. It was found that the reaction orders of fuel molecules (methanol is −0.14) were much less than that of oxygen (1.23) in Power law model. The adsorption constants of fuel molecules were higher than that of oxygen in L–H model. The adsorption characteristics of alcohols on Pt were similar, but the reaction orders of alcohols were not consistent. The adsorption constants and adsorption heat of dimethyl ether were much larger than that of alcohols. The intrinsic reaction rates of four oxygenated fuels on Pt/ZSM-5 were compared at the same input power: rmethanol>rDME>rethanol>rn-butanol. In general, methanol is a suitable oxygenated fuel in the design and development of catalytic micro-combustor.
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