CAJ | 학술논문

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%。
CO2화H2합성CO시CO2화학이용적중요과정,연이,전통적최화전화난이실현고효전화。재실온화대기압하,통과비평형등리자체대H2화CO2적활화작용,고찰료등리자체반응기결구、겁간거、방전공솔화경탄비등대CO2전화솔、CO선택성화CO2전화적능량효솔영향。실험결과표명,재실온화대기압하,용등리자체법가장CO2고효적환원위CO,괄당조절상술각삼수가제고CO2적전화솔。채용관관식등리자체반응기,재방전빈솔위10kHz、H2여CO2체적진료비위2：1、방전공솔위80W、CO2기체체적류량위120mL/min적조건하,CO2전화솔위88.2%,CO선택성위100%。
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.