摘要
为了提高钼基催化剂的煤直接液化催化性能和工业应用的可能性,研究了含钼化合物粉体催化剂性质与煤直接催化性能的关系,制备出高稳定性的三氧化钼油浆催化剂和两种高活性的钼铁复合催化剂。结果表明,含钼化合物的催化活性主要与分散性和晶粒度相关,纳米级三氧化钼活性高,微米级含钼化合物活性低;通过高速剪切和分散剂的锚固作用,纳米三氧化钼粉体能更好地分散于溶剂油中并保持长时间稳定,催化活性也得到显著提高;浸渍法和共沉淀法制备的钼铁复合催化剂中的钼元素处于高度分散状态,钼铁复合催化剂在煤直接液化中展现出协同催化作用,相比Fe催化剂油产率提高了4.5%~5%。
In order to enhance catalytic activity of Mo based catalysts for potential industrial applications in direct coal liquefaction,affecting factors of molybdenum compound powder catalysts on direct coal liquefaction were studied,and molybdenum oxide slurry catalysts with high stability and two highly active Mo-Fe composite catalysts were prepared.The results show that the catalytic activity of Mo compounds is closely related to dispersion and crystal size.The nano molybdenum trioxide showed good catalytic activity,while the micron molybdenum compounds had almost no catalytic effect on coal liquefaction.The nano molybdenum trioxide powder prepared by high-speed shear with dispersion agent was highly dispersed and stable in the solvent oil,which can also promote catalytic activity.Mo was highly dispersed in the Mo-Fe composite catalysts synthesized by impregnation and co-precipitation.The synergy catalytic effect of Mo-Fe composite catalysts increase oil yields by 4.5%-5%when compare to pure Fe catalysts.
作者
谢晶
舒歌平
高山松
王洪学
李剑宇
卢晗锋
陈银飞
XIE Jing;SHU Ge-ping;GAO Shan-song;WANG Hong-xue;LI Jian-yu;LU Han-feng;CHEN Yin-fei(College of Chemical Engineering,Zhejiang University of Technology,Hangzhou 310014,China;China Shenhua Coal to Liquid and Chemical Shanghai Research Institute,Shanghai 201108,China;National Engineering Laboratory for Direct Coal Liquefaction,Shanghai 201108,China)
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2020年第5期1182-1188,共7页
Journal of Chemical Engineering of Chinese Universities
基金
国家重点研发计划(2016YFB0600303)
国家能源集团科技创新(GJNY-19-21)。
关键词
煤直接液化
钼催化剂
粒度
分散性
油产率
direct coal liquefaction
molybdenum catalyst
particle size
dispersion
oil yield
