Plasma -catalytic dry reforming of methane: Screening of catalytic materials in a coaxial packed -bed DBD reactor
Plasma -catalytic dry reforming of methane: Screening of catalytic materials in a coaxial packed -bed DBD reactor
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DOI：
10.1016/j.cej.2020.125519
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发表时间：
2020-10-01
影响因子：
15.1
通讯作者：
Jensen, A. D.
中科院分区：
文献类型：
--
作者：
Andersen, J. A.;Christensen, J. M.;Jensen, A. D.
低温等离子体与催化相结合是一种很有前途的替代热催化的方法。采用介质阻挡放电反应器，在常压、常温、固定等离子体功率为45W的条件下，研究了不同催化填料对甲烷催化干法重整反应的影响。二氧化碳(~22%)和甲烷(~33%)的转化率仅在等离子体中和在等离子体中引入填料时相似。主要原因是在相同的流量下，由于填料的几何形状，气体的停留时间较短。产物气中鉴定出H2、CO、C2-C4碳氢化合物和含氧物。所有催化剂和纯等离子体催化剂对H_2和CO都有较高的选择性，H_2/CO摩尔比约为0.9。铜/氧化铝催化剂的合成气选择性最低(~66%)，而乙醇选择性最高(~3.6%)。
The combination of catalysis with non-thermal plasma is a promising alternative to thermal catalysis. A dielectric-barrier discharge reactor was used to study plasma-catalytic dry reforming of methane at ambient pressure and temperature and a fixed plasma power of 45 W. The effect of different catalytic packing materials was evaluated in terms of conversion, product selectivity, and energy efficiency. The conversion of CO2(~22%) and CH4(~33%) were found to be similar in plasma-only and when introducing packing materials in plasma. The main reason is the shorter residence time of the gas due to packing geometry, when compared at identical flow rates. H2, CO, C2-C4hydrocarbons, and oxygenates were identified in the product gas. High selectivity towards H2and CO were found for all catalysts and plasma-only, with a H2/CO molar ratio of ~0.9. The lowest syngas selectivity was obtained with Cu/Al2O3(~66%), which instead, had the highest alcohol selectivity (~3.6%).