助剂钾对Ni/Al_2O_3催化转化焦油模型化合物的影响研究  

Effect of K on Catalytic Performance of Ni/Al_2O_3 in Tar Model Compound Cracking

作　　者：梁鹏[1,2] 李建会 韩振华[1] 张亚青[1] 武加峰[1] 张荣[2] 

机构地区：[1]山东科技大学化学与环境工程学院,山东青岛266590 [2]中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原030001

出　　处：《山东科技大学学报（自然科学版）》2013年第5期25-30,共6页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(21006059);煤转化国家重点实验室开放基金项目(J12-13-202)

摘　　要：以甲苯为焦油模型化合物,分别以KCl,K2CO3为前驱体,考察了助剂钾对Ni/Al2O3催化剂催化转化反应性能的影响。实验结果表明:添加助剂钾可以降低镍基催化剂表面酸性,有效改善催化剂的活性,但在催化剂煅烧过程中钾离子不能与载体形成晶石结构,在反应过程中容易流失。KCl和K2CO3均具有较好的抗积炭性能,但由于K2CO3属于强碱性物质,催化剂负载后容易因吸水硬度降低。In the paper, toluene as tar model compounds, KCl and K2 CO3 respectively as precursor, the effect of K on Ni/A120：~ catalyst in catalytic cracking were investigated. The results show that adding K can reduce the acidity of nickel-based catalyst on the surface,and effectively improve the catalytic activity,but K easily loses during reaction because it can＇t form spar structure with carrier during catalyst calcinations. KCl and K2CO3 have good ability to resist carbon deposition,but the hardness of catalyst loading K2CO3 easily drops because K2 CO3 is strongly alkaline.

关 键 词：甲苯 镍基催化剂 焦油 助剂 

分 类 号：TQ524[化学工程—煤化学工程]