Impact of Argon in Reforming of (CH4 + CO2) in Surface Dielectric Barrier Discharge Reactor to Produce Syngas and Liquid Fuels
Impact of Argon in Reforming of (CH4 + CO2) in Surface Dielectric Barrier Discharge Reactor to Produce Syngas and Liquid Fuels
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DOI：
10.1007/s11090-018-9886-2
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发表时间：
2018-03
影响因子：
3.6
通讯作者：
A. Rahmani;M. Nikravech
中科院分区：
文献类型：
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作者：
A. Rahmani;M. Nikravech
这项工作的目的是研究Ar在甲烷和二氧化碳等离子体重整过程中的作用，以便将沼气转化为液体燃料。人工合成的甲烷和二氧化碳的混合物代表了典型的沼气成分，在表面介质阻挡放电反应器中进行了处理，并加入了Ar，这被认为可以改善放电条件。测量结果表明，在进料流量和外加功率不变的情况下，当进料中的Ar含量从0增加到66%时，电子密度增加到60%，电子平均能量增加到50%。在此条件下，CH4和CO2的绝对转化率分别从19%提高到43%和11%提高到25%，H2/CO比提高到0.9。然而，尽管有这些改进，超过33%的Ar的加入降低了碳黑和碳烟沉积的碳平衡，降低了液体产物的选择性，最终降低了CH4+ CO2混合气转化的能量效率。同时，10种液体燃料的选择性，主要是醇、酮和轻质有机酸，以3wt%的产率获得，也取决于进料混合物中的Ar流量。
The aim of this work is to study the role of argon during plasma reforming of methane and carbon dioxide in order to convert Biogas into liquid fuels. Mixtures of synthetic CH4and CO2, representing typical biogas compositions, were processed in a surface dielectric barrier discharge reactor in the presence of argon, which is considered to improve the discharge conditions. Our measurements showed that at constant feed flow rate and constant applied power, increasing the argon percentage from 0 to 66% in the feed, leads to increase the electron density up to 60% and the electron mean energy up to 50%. In these conditions, the absolute conversions of CH4and CO2are improved respectively from 19 to 43% and from 11 to 25%, the H2/CO ratio enhances up to 0.9. However, despite these improvements, the addition of argon beyond 33% decreases the carbon balance by deposition of black carbon and soot, decreases the selectivity of liquid products and finally lowers the energy efficiency of CH4+ CO2mixture conversion. Meanwhile the selectivity of 10 liquid fuels principally alcohols, ketones and light organic acids, obtained in a yield of 3 wt%, depends also on the flow rate of argon in the feed mixture.