热等离子体和催化剂协同作用重整甲烷和二氧化碳制备合成气

在常压下,利用15kW的实验室装置,以氮气为工作气体,进行了等离子体与催化剂协同作用下甲烷和二氧化碳重整制备合成气的实验。实验着重考察进料气V(CH4)/V(CO2)为4:6、氮气流量1.7m3/h、放电功率9.6kW条件下,原料气总流量变化对反应转化率、产物选择性及能量效率的影响。结果表明:随原料气总流量的增加,反应物转化率逐渐降低,产物选择性基本不变。在等离子体与催化剂协同作用下,反应物转化率、产物选择性及能量产率都比单独的等离子体作用提高大约15%~20%。尤其是能量产率比先前的文献报道值高出150%。热等离子体与催化剂协同作用重整反应处理量大、能量产率高,有较好的应用前景。

The Reforming of CO2 and CH4 to Syngas by Plasma Jet Cooperating with Catalysts

The reforming of C02 and CH4 were performed at atmospheric pressure by nitrogen plasma jet coopera- ting with catalysts. The effect of total flux on the conversions of reactants, the selectivity of products and energy ef- ficiency were investigated when plasma power, the molar ratio of CH4 to C02 and the nitrogen flow were 9. 6kW, 4 - 6 and 1.7m^3/h, respectively. The experimental results showed that with the increase of total flux, the conversions of methane and carbon dioxide decreased gradually, and the selectivity of products hardly changed. When using plasma with catalysts, the conversions of methane and carbon dioxide, the selectivity of products, and energy effi- ciency were about 15% - 20% higher than those using plasma only. Especially, the energy efficiency kept on higher level of 150% more than those of previous investigations. A larger processing capacity and higher energy efficiency could be achieved when plasma jet cooperating with catalysts was applied. It showed a better application prospect.