Renewable and high-concentration syngas production from oxidative reforming of simulated biogas with low energy cost in a plasma shade
Renewable and high-concentration syngas production from oxidative reforming of simulated biogas with low energy cost in a plasma shade
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DOI：
10.1016/j.cej.2013.08.056
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发表时间：
2013-12
影响因子：
15.1
通讯作者：
Jing‐Lin Liu;Xiao‐Song Li;Xiaobing Zhu;Kai Li;C. Shi;Aimin Zhu
中科院分区：
文献类型：
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作者：
Jing‐Lin Liu;Xiao‐Song Li;Xiaobing Zhu;Kai Li;C. Shi;Aimin Zhu
首次采用旋转火花通道产生的大反应空间等离子体罩，对模拟沼气（CH 4：CO2：O2 = 3：2：2）进行氧化重整，以低能耗生产高浓度合成气（CO+ H2）。这种独特的等离子体表现出快速和缓慢的区域，其中O2，CH 4和CO2的转化率和合成气的干基浓度（C CO+ H2干）以两种显著不同的速度与比能量输入（SEI）变化。随着SEI的增加，在SEI< 84 kJ/mol时，转化率和C CO+ H2干物质首先迅速增加，而在SEI> 84 kJ/mol时，转化率和C CO+ H2干物质的增加速度要慢得多。此外，合成气的能量成本（EC CO+ H2）与SEI的V形曲线观察。由此发现，在最佳的SEI下，CO+ H2的EC值最低（1.0eV/molecule），而干CO+ H2的C值最高（73%）。在8小时的测试中验证了在最佳SEI下等离子体反应的良好稳定性。
A novel plasma shade with large reactive space generated by rotating spark channels was used for the first time for oxidative reforming of simulated biogas (CH 4: CO 2: O 2= 3: 2: 2) to produce high-concentration syngas (CO+ H 2) with low energy cost. This unique plasma exhibited rapid-and slow-zones where the conversion of O 2, CH 4 and CO 2 and dry-basis concentration of syngas (C CO+ H 2 dry) changed at two significantly different paces with specific energy input (SEI). With increasing SEI, the conversion and C CO+ H 2 dry first increased rapidly at SEI< 84 kJ/mol, while the conversion and C CO+ H 2 dry increased at a much slower pace at SEI> 84 kJ/mol. Moreover, V-shape profile of syngas energy cost (EC CO+ H 2) versus SEI was observed. Thereby, the optimal SEI was found at which the lowest EC CO+ H 2 (1.0 eV/molecule) and a very high C CO+ H 2 dry (73%) were simultaneously achieved. The good stability of the plasma reaction at the optimal SEI was verified over an 8-hour test.