热等离子体与催化剂协同重整CH4-CO2

考察了热等离子体与催化剂协同作用于重整反应过程。实验采用三种不同的模式进行:等离子体单独作用、等离子体与催化剂协同作用、等离子体与催化剂协同作用且部分原料气引入等离子体放电区。结果表明,在模式三下,当原料气的总流量为5 m³/h、CH₄/CO₂物质的量比为4/6、等离子体的输入功率为14.4 kW时,CH₄-CO₂重整过程可获得最佳结果,CH₄转化率为77.00%、CO₂转化率为62.40%、H₂选择性为96.70%、CO选择性为88.60%、反应比能为193 kJ/mol、过程的能量转化率为66.4%,该结果已十分接近CH₄-H₂O(g)重整的技术指标。最佳结果主要得益于模式三下的三种不同的反应路径,放电反应、热化学反应与催化反应。

CH4-CO2 reforming by combination of plasma and catalysts

To reduce the energy consumption of CO₂ reforming of CH₄, the synergies of thermal plasma and catalysts in the reforming process was studied in three elaborate modes: plasma only, combination of plasma and catalysts (CPC), and CPC with part of feed gases introduced into plasma discharge region. The optimal specific energy of 193 kJ/mol and energy conversion efficiency of 66.4% were achieved under the conditions of CH₄/CO₂ of 4/6, input power at 14.4 kW, feed gases of 5 m³/h in mode 3, when the conversions of CH₄ and CO₂ were 77.00% and 62.40%, and the selectivities of H₂ and CO were 88.60% and 96.70%, respectively. These results were closed to that of CH₄-H₂O(g) reforming process. The excellent performance of the present process benefits from three different reaction courses: discharge reaction, thermochemical reaction and catalytic reaction.