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Influence of Operating Parameters on Plasma-Assisted Dry Reforming of Methane in a Rotating Gliding Arc Reactor
Plasma Chemistry and Plasma Processing ( IF 2.6 ) Pub Date : 2020-03-18 , DOI: 10.1007/s11090-020-10074-2
Jennifer Martin-del-Campo , Sylvain Coulombe , Jan Kopyscinski

The environmental impact of greenhouse gases such as carbon dioxide and methane can be reduced if they are used as feedstock to synthesize chemical building blocks such as syngas (CO, H 2 ) via dry reforming. Methane dry reforming is investigated using an Ar/CO 2 /CH 4 rotating gliding arc (RGA) reactor powered by a dual-stage pulsed DC power supply. Tangential gas injection combined with a static magnetic field enabled the rotation and upward displacement of the arc along the conical cathode and the grounded anode, yielding to a larger plasma volume. Different parameters such as peak arc current (0.74 and 1.50 A), total gas flow rate (3.7, 4.7 and 6.7 SLPM), CO 2 /CH 4 ratio (1.0, 1.5, 2.0) and gas inlet preheating (room temperature, 200 °C) were studied to determine the most efficient parameter combination. Gas conversion was measured online using a calibrated mass spectrometer and offline using a gas chromatograph. Noticeable increases in CO 2 and CH 4 conversions, as well as H 2 and CO yields, were obtained when doubling the peak arc current. For the larger peak current, higher H 2 yields were obtained at a CO 2 /CH 4 = 1.0, and the best energy efficiencies were obtained at the lowest specific energy input values. No significant effect of the gas inlet temperature on the conversions or yields was found. Trace amounts of acetylene and ethylene, as well as some carbon deposits were observed as by-products of syngas generation. The low amount of by-products obtained implies a good selectivity for CO and H 2 , i.e., a cleaner syngas when produced with RGA discharge.

中文翻译:

操作参数对旋转滑移电弧反应器中甲烷等离子辅助干法重整的影响

如果将二氧化碳和甲烷等温室气体用作原料,通过干重整合成合成气(CO、H 2 )等化学构件,则可以减少它们对环境的影响。使用由双级脉冲直流电源供电的 Ar/CO 2 /CH 4 旋转滑翔弧 (RGA) 反应器研究甲烷干重整。切向气体注入与静磁场相结合,使电弧能够沿着锥形阴极和接地阳极旋转和向上位移,从而产生更大的等离子体体积。不同的参数,如峰值电弧电流(0.74 和 1.50 A)、总气体流量(3.7、4.7 和 6.7 SLPM)、CO 2 /CH 4 比率(1.0、1.5、2.0)和进气预热(室温,200°) C) 被研究以确定最有效的参数组合。使用校准质谱仪在线测量气体转化率,使用气相色谱仪离线测量气体转化率。当峰值电弧电流加倍时,CO 2 和CH 4 转化率以及H 2 和CO 产率显着增加。对于更大的峰值电流,在 CO 2 /CH 4 = 1.0 时获得更高的 H 2 产率,并且在最低特定能量输入值时获得最佳能量效率。未发现气体入口温度对转化率或产率有显着影响。作为合成气生成的副产品,观察到痕量的乙炔和乙烯以及一些碳沉积物。获得的少量副产物意味着对 CO 和 H 2 的良好选择性,即当用 RGA 放电生产时,合成气更清洁。当峰值电弧电流加倍时,CO 2 和CH 4 转化率以及H 2 和CO 产率显着增加。对于更大的峰值电流,在 CO 2 /CH 4 = 1.0 时获得更高的 H 2 产率,并且在最低特定能量输入值时获得最佳能量效率。未发现气体入口温度对转化率或产率有显着影响。作为合成气生成的副产品,观察到痕量的乙炔和乙烯以及一些碳沉积物。获得的少量副产物意味着对 CO 和 H 2 的良好选择性,即当用 RGA 放电生产时,合成气更清洁。当峰值电弧电流加倍时,CO 2 和CH 4 转化率以及H 2 和CO 产率显着增加。对于更大的峰值电流,在 CO 2 /CH 4 = 1.0 时获得更高的 H 2 产率,并且在最低特定能量输入值时获得最佳能量效率。未发现气体入口温度对转化率或产率有显着影响。作为合成气生成的副产品,观察到痕量的乙炔和乙烯以及一些碳沉积物。获得的少量副产物意味着对 CO 和 H 2 的良好选择性,即当用 RGA 放电生产时,合成气更清洁。并且在最低的特定能量输入值下获得最佳能源效率。未发现气体入口温度对转化率或产率有显着影响。作为合成气生成的副产品,观察到痕量的乙炔和乙烯以及一些碳沉积物。获得的少量副产物意味着对 CO 和 H 2 的良好选择性,即当用 RGA 放电生产时,合成气更清洁。并且在最低的特定能量输入值下获得最佳能源效率。未发现气体入口温度对转化率或产率有显着影响。作为合成气生成的副产品,观察到痕量的乙炔和乙烯以及一些碳沉积物。获得的少量副产物意味着对 CO 和 H 2 的良好选择性,即当用 RGA 放电生产时,合成气更清洁。
更新日期:2020-03-18
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