La2O3/γ-Al2O3催化剂用于二甲醚二氧化碳重整制氢

阿迪拉·阿不都外力; 马忠; 蒋淇忠; 张武高; 马紫峰

La₂O₃/γ-Al₂O₃催化剂用于二甲醚二氧化碳重整制氢

1.
上海交通大学化学化工学院, 上海 200240;
2.
上海交通大学机械与动力学院, 上海 200240

基金项目: 国家自然科学基金（21276254）。

详细信息

通讯作者:
蒋淇忠，E-mail：qzjiang@sjtu.edu.cn。

中图分类号: TQ032
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- 文章访问数: 1119
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- 被引次数: 0
出版历程
- 收稿日期: 2013-06-13
- 修回日期: 2013-09-22
- 刊出日期: 2014-01-30

CO₂ reforming of dimethyl ether to produce hydrogen over La₂O₃/γ-Al₂O₃ catalyst

1.
Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
2.
School of Mechanical and Power Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

摘要

摘要: 采用等体积浸渍法制备了不同负载量的La₂O₃/γ-Al₂O₃催化剂，并考察了负载量和反应温度对催化剂用于二甲醚二氧化碳重整制氢反应的性能影响。结果表明，反应温度为550℃、La₂O₃负载量为15%时，催化剂表现出最好的性能：二甲醚的转化率为100%，二氧化碳的转化率达到85.4%，产物氢气的选择性高达93.3%，一氧化碳的选择性为76.04%，副产物甲烷的选择性仅为6.3%。550 ℃时其平均积炭速率为1.387 5 mg/（g·h）。研究还利用XRD、BET、TEM、TG等方法对催化剂进行了表征。
- 二甲醚 /
- 二氧化碳重整 /
- 氧化镧 /
- 氧化铝 /
- 氢气
Abstract: In this paper, La₂O₃/γ-Al₂O₃ catalysts with different La loading were prepared by incipient wetness impregnation method.This paper investigated the influence of La loading and reaction temperature on catalytic performance for the carbon dioxide reforming of DME. The catalysts were characterized by X-ray diffraction (XRD), BET surface area, transmission electron microscopy (TEM), thermogravimetry and differential thermal analysis(TG-DTA). The results showed that the La₂O₃/γ-Al₂O₃ with 15% La loading gave the best catalytic performance at 550 ℃.The selectivity of H₂ and CO were 93.3% and 76.04%, and the conversion of CO₂ and DME were about 85.4% and 100%, respectively, while the selectivity of byproduct CH₄ is only 6.3%. This 15% La₂O₃/γ-Al₂O₃catalysts had more symmetrical distribution of particle size,larger specific surface area and more proper pore structure, and it kept stable performance during 4 h test. As a result, the catalyst average coking rate was only about 1.387 5 mg/(g·h).
- dimethyl ether /
- carbon dioxide reforming /
- lanthanum oxide /
- alumina /
- hydrogen

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