Stable kilohertz spark discharges for high-efficiency conversion of methane to hydrogen and acetylene
Stable kilohertz spark discharges for high-efficiency conversion of methane to hydrogen and acetylene
复制标题
稳定的千赫兹火花放电可将甲烷高效转化为氢气和乙炔
DOI：
10.1088/0022-3727/41/17/175203
复制
发表时间：
2008-09-07
影响因子：
3.4
通讯作者：
Zhu, Ai-Min
中科院分区：
文献类型：
--
作者：
Li, Xiao-Song;Lin, Can-Kun;Zhu, Ai-Min
首次研究了具有独特放电电流波形的稳定千赫兹火花放电在常压下甲烷高效转化为氢气和乙炔。通过使用纯甲烷作为进料气体在220分钟排放时间内产物流中的浓度变化来确认排放稳定性。利用稳定的千赫兹火花放电，产物流中的氢气浓度可以高达72.1体积%，每产生H2分子的能量成本为6.7 eV，甲烷转化率为81.5%。乙炔浓度可达到18.4体积%，能量成本为21.2 eV/C2 H2分子和70.3%的甲烷转化率。对于从51.9%至81.5%的甲烷转化率，能量成本为6.6-10.7 eV/转化的CH 4分子，4.4-6.7 eV/产生的H2分子和16.9-27.6 eV/产生的C2 H2分子。这项研究表明，高浓度的生产无COx的氢气和乙炔的甲烷在一个低的能源成本，稳定的千赫火花放电。
Stable kilohertz spark discharges with a unique waveform of discharge current were studied for high-efficiency conversion of methane to hydrogen and acetylene at atmospheric pressure for the first time. Discharge stability was confirmed by the concentration variation in the product streams with 220 min discharge time using pure methane as the feed gas. Utilizing the stable kilohertz spark discharges, the hydrogen concentration in the product stream could be as high as 72.1 vol% at an energy cost of 6.7 eV per H2 molecule produced and 81.5% of methane conversion. The acetylene concentration could reach 18.4 vol% at an energy cost of 21.2 eV per C2H2 molecule produced and 70.3% of methane conversion. For methane conversion ranging from 51.9% to 81.5%, the energy costs were 6.6–10.7 eV per CH4 molecule converted, 4.4–6.7 eV per H2 molecule produced and 16.9–27.6 eV per C2H2 molecule produced. This study showed the high-concentration production of COx-free hydrogen and acetylene from methane at a low energy cost by stable kilohertz spark discharges.