摘要
逆水煤气变换(RWGS)反应可以有效的将CO_(2)转化为更具有价值的CO,被认为是最具有应用前景的反应之一。将Cu/SiO2催化剂用于RWGS反应,考察了在浸渍过程中添加尿素对催化剂结构和性能的影响。采用包括H2-TPR、XRD和TEM等对催化剂进行表征,并且在400~750℃的温度范围内进行RWGS性能测试。结果表明,与Cu/SiO_(2)催化剂相比,尿素辅助法制备的Cu/SiO_(2)-N催化剂在逆水煤气变换反应中具有较高的催化活性,并且对CO具有100%的选择性,尿素的引入可以有效地减小活性金属Cu的粒径,使其具有高分散性,Cu/SiO_(2)-N催化剂金属分散度达到26.5%,催化剂的活性得到了显著提高。
Reverse water gas shift(RWGS)reaction can effectively convert CO_(2) into more valuable CO,which is considered to be one of the most promising reactions.In this study,Cu/SiO_(2) catalyst was used in RWGS reaction,and the effect of adding urea on the structure and performance of the catalyst during impregnation was investigated.The catalysts were characterized by H_(2)-TPR,XRD and TEM,and the RWGS performance was tested in the temperature range of 400~750℃.The results showed that compared with Cu/SiO_(2) catalyst,the Cu/SiO_(2)-N catalyst prepared by urea-assisted method had higher catalytic activity and 100%CO selectivity in reverse water gas shift reaction.The introduction of urea could effectively reduce the particle size of active metal Cu and make it highly dispersed.The metal dispersion of Cu/SiO_(2)-N catalyst reached 26.5%,and the activity of the catalyst was significantly improved.
作者
刘宁
曹忠
崔莎
刘辉
王路辉
LIU Ning;CAO Zhong;CUI Sha;LIU Hui;WANG Lu-hui(Zhejiang Provincial Key Laboratory of Petrochemical Pollution Control,Zhejiang Ocean University,Zhoushan 316022,China;School of Petrochemical Engineering and Environment,Zhejiang Ocean University,Zhoushan 316022,China;School of Food and Pharmaceutical,Zhejiang Ocean University,Zhoushan 316022,China;National&Local Joint Engineering Research Center of Harbor Oil&Gas Storage and Transportation Technology,Zhejiang Ocean University,Zhoushan 316022,China)
出处
《化学试剂》
CAS
北大核心
2023年第8期40-46,共7页
Chemical Reagents
基金
浙江省自然科学基金项目(LZY23B030005)
浙江省石油化工污染控制实验室开放基金项目(2021Z01)。
