CeO2 as the oxygen carrier for partial oxidation of methane to synthesis gas in molten salts:: Thermodynamic analysis and experimental investigation

被引:55
作者
Wei, Yonggang [1 ]
Wang, Hua [1 ]
He, Fang [1 ]
Ao, Xianquan [1 ]
Zhang, Chiyuan [1 ]
机构
[1] Kunming Univ Sci & Technol, Fac Mat & Met Engn, Kunming 650093, Peoples R China
来源
JOURNAL OF NATURAL GAS CHEMISTRY | 2007年 / 16卷 / 01期
基金
中国国家自然科学基金;
关键词
partial oxidation; methane; cerium oxide; synthesis gas; molten salt;
D O I
10.1016/S1003-9953(07)60018-8
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
A new technique - the direct partial oxidation of methane to synthesis gas using lattice oxygen in molten salts medium has been introduced. Using CeO2 as the oxygen carrier, thermodynamic data were calculated in the reaction process, and the results indicated that direct partial oxidation of methane to synthesis gas using lattice oxygen of cerium oxide is feasible in theory. In a stainless steel reactor, the effects of temperature and varying amounts of gamma-Al2O3 supported CeO2 on CH4 conversion, H-2 and CO selectivity, were investigated, respectively. The results show that 10% CeO2/gamma-Al2O3 has the maximal reaction activity at a temperature of 865 degrees C and above, the H-2/CO ratio in the gas that has been produced reaches 2 and the CH4 conversion, H-2 and CO selectivity reached the following percentages: i.e. 61%, 89%, and 91% at 870 V, respectively. In addition, increase of reaction temperature is favorable for the partial oxidation of methane.
引用
收藏
页码:6 / 11
页数:6
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