摘要
甲烷和二氧化碳重整制合成气是有效利用二氧化碳资源的重要途径,对于环境保护和综合利用资源具有重大意义。文章采用浸渍法制备一系列不同镍钼质量比的Ni-Cu-Mo/Al_2O_3催化剂,通过固定床反应器考察不同Ni/Mo质量比和反应温度对催化剂性能的影响,并采用XRD,BET,SEM,CO_2-TPD技术对催化剂进行了表征。结果表明:催化剂的最佳反应温度是800℃,Ni/Mo质量比为0.75的催化剂表现出最好的催化活性。在800℃,空速182 m L/(g·min)的反应条件下,CH_4、CO_2的转化率分别为97.7%,99.1%,CO,H2的选择性分别达到94.4%,92.1%。
CH4-CO2 reforming for syngas production is a promising way for effective use of CO2, which is challenging from both economic and environmental points. The aim is to investigate the effect of Ni-Cu-Mo/Al2O3 catalysts with different Ni/Mo mass ratio on the CO2 reforming of CH4 reaction. The evaluation of the catalytic performances of the composite catalysts was conducted in a fixed-bed reactor at atmospheric pressure. The influencing factors, including temperature, Ni/Mo mass ratio were investigated. The characteristics of the catalysts were characterized by X-ray diffraction （XRD）, Brunauer-Emmett-Teller （BET） analysis, scanning electron microscope （SEM） and temperature-programmed desorpti＇on of CO2 （CO2-TPD）. The results indicate that the catalysts with Ni/Mo mass ratio of 0.75 exhibit better activity at the optimum temperature of 800℃. At the reaction conditions of 800℃ and a space velocity of 182 mL/（ g·min） , the conversion rates of CH4 and CO2are 97.7% and 99.1% , respectively, and the selectivity of CO and H2 are 94.4% and 92.1% , respectively.
出处
《化学工程》
CAS
CSCD
北大核心
2016年第1期53-57,共5页
Chemical Engineering(China)
基金
山东省优秀中青年科学家科研奖励基金项目(BS2011NJ006)
