郑建，包叶朋，周锐，张毅然，林赫.铂基催化剂快速部分催化氧化甲烷的研究[J].内燃机工程,2021,42(1):28-33.
铂基催化剂快速部分催化氧化甲烷的研究
Study on Rapid and Partial Oxidation of Methane by Platinum Promoted Catalyst
DOI：10.13949/j.cnki.nrjgc.2021.01.005
关键词:甲烷  快速重整  部分氧化  氢气  铂
Key Words:methane  quick reforming  partial oxidation  H2  Pt
基金项目:
作者单位
郑建，包叶朋，周锐，张毅然，林赫 上海交通大学 动力机械与工程教育部重点试验室，上海 200240 
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摘要:以Al2O3为载体，采用浸渍法制备Pt/Al2O3催化剂，通过测量重整反应过程中催化剂的温度分布情况，研究了改变甲烷快速部分氧化重整反应中反应条件（反应气体预混合温度、N2体积比例、CH4/O2比）对反应物的转化率及产物选择性的影响。研究发现，催化剂床层温度的上升可以促进CH4的转化，使H2和CO的选择性升高且H2与CO的物质的量的比（简称H2/CO比，依此类推）升高。N2体积比例及CH4/O2比的升高，会降低催化剂床层温度，进一步造成CH4的转化率和H2/CO比降低，但与仅降低混合气预热温度不同的是，提高N2体积比例及CH4/O2比会造成H2和CO的选择性升高，这可能是催化剂表面的活性氧导致的。通过对甲烷在Pt催化剂上的反应机理进行了初步讨论，认为甲烷的快速部分催化氧化反应为多种反应路径共存，不同的反应条件下各种反应路径所占比例会发生变化。
Abstract:A Pt/Al2O3 catalyst was prepared from the impregnation of α-Al2O3 foam, and an experimental system for methane reforming was established. By adjusting the reaction parameters, the effects of different reaction parameters (including CH4/O2 ratio, feed gas temperature, N2 volume percent) on the conversion rate of reactants and the selectivity of product were researched. The results show that the increase of catalyst bed temperature can promote the conversion of CH4, the selectivity of H2 and CO, and the ratio of H2/CO. The increase of the N2 volume percent and CH4/O2 ratio will cause a decrease in the temperature of the catalyst bed, which further leads to a reduction in the conversion rate of CH4 and H2/CO ratio, but it would also increase the selectivity of H2 and CO, which may be due to the active oxygen on the surface of the catalyst. By measuring the temperature distribution of the catalyst and analyzing the reaction mechanism of methane by the platinum promoted catalyst, it is found that the rapid and partial catalytic oxidation of methane had multiple reaction paths, and the proportion of very reaction path will change under different reaction conditions.
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