复合镍基催化剂表面纳米团簇结构的调控及其催化应用  

Control and Catalytic Application of Surface Nanocluster on Compound Ni-Based Catalyst

作　　者：杨云贵[1] 柴晓燕[2] 陶旭梅[2,3] 梅丽[2] 印永祥[2] 戴晓雁[2] 尚书勇[1,2,4] 

机构地区：[1]宜宾学院化学与化工学院,四川宜宾644000 [2]四川大学化工学院,四川成都610065 [3]青岛科技大学化工学院,山东青岛261500 [4]宜宾丝丽雅股份有限公司,四川宜宾644002

出　　处：《化学反应工程与工艺》2010年第6期558-564,共7页Chemical Reaction Engineering and Technology

基　　金：国家自然科学基金(10475060;11075113);四川省教育厅自然科学重点基金项目(09ZA151)

摘　　要：利用新型等离子体技术,将常压放电冷等离子体炬应用于催化剂制备,研究了制备方法、载体、活性组分和助剂对复合镍基催化剂表面纳米团簇结构的调控效果;并分析了催化剂表面纳米团簇结构的形成机理和催化剂性能的构效关系。结果表明:采用冷等离子体炬直接焙烧还原可调控表面纳米团簇;以-γAl2O3为载体的Ni催化剂(PC&R)具有较高的活性和稳定性;活性组分Ni对表面纳米团簇结构的调控效果较好,添加量为12%(质量分数)时,表面纳米团簇高度分散,其尺寸约5 nm;助剂Mg添加可有效提高催化剂活性,合适的添加量为1%,且催化剂仍保持良好的表面纳米团簇结构,尺寸约5 nm;表面纳米团簇结构优化后的催化剂抗积炭能力明显提高。The atmospheric cold plasma jet was adopted to prepare compound Ni-based catalyst and the effects of preparation method,support,the content of active component and the additive on catalytic activity and surface nanocluster were investigated.The mechanism of the formation of surface nanocluster and the relationship between the structure and activity of the catalyst were analyzed.The results showed that the surface nanocluster could be contolled by reduction through atmospheric cold plasma jet.The Ni-based catalyst supported γ-Al2O3 prepared by atmospheric cold plasma jet exhibited high activity and stability,and the dispersion was high and the partice size was about 5 nm when Ni mass fraction was 12%.The additive Mg could increase effectively the catalytic activity,and the surface nanocluster structure could remain and the particle size was about 5 nm when Mg mass fraction was 1%.The resistance to carbon deposition of the catalyst incresed obviously after the structure of surface nanocluster was optimized.

关 键 词：常压冷等离子体炬 镍基催化剂 表面纳米团簇结构 镁 甲烷 二氧化碳 

分 类 号：TQ426.64[化学工程]