New Co−La/SiO2 Catalyst for the Simultaneous Production of C2H4 and Syngas from CH4 with Na2WO4/Mn/SiO2
详细信息 查看全文
- 作者：Songtao Ren ; Song Qin ; Jianqiang Zhu ; Xiaoxi Peng ; Changwei Hu
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2010
- 出版时间：March 3, 2010
- 年：2010
- 卷：49
- 期：5
- 页码：2078-2083
- 全文大小：132K
- 年卷期：v.49,no.5(March 3, 2010)
- ISSN：1520-5045
文摘
A new dual catalyst bed system with Na2WO4/Mn/SiO2 in the first layer and Co−La/SiO2 in the second layer has been applied in the conversion of methane to ethylene and syngas simultaneously. The effects of flow velocity and the ratio of methane to oxygen on the catalytic performance were investigated. The results showed that, when F = 150 mL/min, CH4/O2 = 2.5, the amount of Na2WO4/Mn/SiO2 was 0.27 g in the first bed, and that of Co−La/SiO2 was 0.1 g in the second bed, the expected mixture of C2H4/H2/CO = 1/1/1 with a total yield of 20.6% for C2H4 + CO was achieved, which could be directly used as a feedstock to produce propanal by hydroformylation of ethylene. The new process provides an efficient method for the utilization of CO2, H2O, and thermicity. The Co−La/SiO2 catalyst on the second layer was found to possess a catalytic performance for both partial oxidation of methane and oxidative coupling of methane reactions.