冷等离子体强化制备镍催化剂及应用  

Preparation and Application of Ni Catalyst via Plasma Intensification

作　　者：赵彬然[1] 闫晓亮[1] 刘昌俊[1] 

机构地区：[1]天津大学化工学院先进纳米技术中心,天津300072

出　　处：《化学反应工程与工艺》2013年第3期222-229,共8页Chemical Reaction Engineering and Technology

基　　金：国家自然科学基金重大项目课题(20990223)

摘　　要：Ni催化剂因资源丰富、价格低廉、高活性和高选择性已被广泛应用于各类催化反应(如水汽转化反应)中。但是Ni催化剂常因积碳、烧结和中毒而失活。冷等离子体技术具有简捷高效、经济节能、绿色低碳的特点,制备催化剂时会影响无机盐的分解,使晶体成核与生长过程中具有与热分解非常不同的特性。等离子体用于催化剂制备对于解决Ni催化剂的应用短板有一定的促进作用。等离子体制备的催化剂Ni颗粒尺度小,分散度高,因此具有较高的活性;等离子体制备的催化剂具有单一的表面结构,抑制了积碳的形成和H2S的吸附,具有比较优异的抗积碳和耐硫性能;等离子体还会增强Ni金属与载体的相互作用,抑制了Ni颗粒的迁移,因此具有优异的抗烧结性能。The supported Ni catalyst has been used for many reactions for its high activity and selectivity, low price and abundance in nature. But the application is limited for its coke, sintering and poisoning. Plasma, an efficient and green technology, can solved the problems effectively, for its influence on the decomposition of metal salt and on the crystal nucleation and growth. Ni particle size is smaller, Ni dispersion is higher and Ni atom is enriched on the surface when the catalyst is prepared via plasma. Therefore the catalyst shows higher activity compared to the calcined catalyst. The surface of Ni particle prepared by plasma shows single lattice plane （Ni（111））, which limits the coke formation and H2S adsorption and leads to excellent resistance to coke formation and sulfur poisoning. The interaction of metal and support of plasma-treated catalyst is strengthened, thus the migration of Ni particle is limited, and the resistance to Ni sintering is enhanced.

关 键 词：等离子体 镍基催化剂 积碳 烧结 耐硫 

分 类 号：TQ138[化学工程—无机化工]