利用非平衡等离子体方法将CO_2还原成CO的研究  

Reduction of CO_2 to CO Using CO_2-H_2 Non-equilibrium Plasma Method

作　　者：周军成[1] 尹燕华[1] 郑邯勇[1] 徐月[1] 周旭[1] 龚俊松[1] 

机构地区：[1]中国船舶重工集团公司第七一八研究所,邯郸056027

出　　处：《高电压技术》2012年第5期1065-1069,共5页High Voltage Engineering

摘　　要：CO2和H2合成CO是CO2化学利用的重要过程,然而,传统的催化转化难以实现高效转化。在室温和大气压下,通过非平衡等离子体对H2和CO2的活化作用,考察了等离子体反应器结构、极间距、放电功率和氢碳比等对CO2转化率、CO选择性和CO2转化的能量效率影响。实验结果表明,在室温和大气压下,用等离子体法可将CO2高效的还原为CO,适当调节上述各参数可提高CO2的转化率。采用管管式等离子体反应器,在放电频率为10kHz、H2与CO2体积进料比为2:1、放电功率为80W、CO2气体体积流量为120mL/min的条件下,CO2转化率为88.2%,CO选择性为100%。Conversion of CO2 to CO by H2 has been recognized as one of the important processes for CO2 utilization, but it is difficult to obtain high CO yield by catalytic method. We discussed the role of plasma activation in the direct gas phase reduction of CO2 to CO. The plasma was obtained by dielectric barrier discharge to the mixture of H2 and CO2 at room temperature and atmospheric pressure. Moreover, we investigated the effects of main parameters on CO2 conversion, CO selectivity and energy efficiency of CO2 conversion , such as discharge power,the structure of plasma reactors, the ratio of H2 to CO2 as well as space between electrodes. It is observed that, at room temperature and atmospheric pressure, H2 and CO2 can be directly converted into CO only by plasma activation. The proper adjustment of above parameters can increase CO2 conversion. When the CO2 flow rate of the feed gas, the ratio of H2 to CO2, the discharge power, and the discharge frequency are fixed at 120 mL/min, 80 W and 10 kHz, respectively, the CO2 conversion efficiency and CO selectivity are 88.2% and 100%, respectively.

关 键 词：CO2 H2 等离子体 CO 反应器 能量效率 

分 类 号：X701[环境科学与工程—环境工程] TM89[电气工程—高电压与绝缘技术]