碳纳米管负载镍基催化剂上乙炔选择性加氢  

Acetylene selective hydrogenation on carbon nanoutbes supported Ni-based catalyst

作　　者：胡长员[1] 段武茂[2] 李凤仪[3] 张荣发[1] 何向明[1] 刘庭芝[1] 

机构地区：[1]江西科技师范学院江西省材料表面工程重点实验室,江西南昌330013 [2]江西农业大学工学院,江西南昌330045 [3]南昌大学化学系,江西南昌330047

出　　处：《现代化工》2007年第8期34-37,共4页Modern Chemical Industry

基　　金：国家自然科学基金项目(20263003);江西省自然科学基金项目(0250009)

摘　　要：分别采用浸渍法、化学还原法和超声辅助的浸渍-化学还原法,制备晶态Ni/CNTs、非晶态NiB和NiB/CNTs催化剂,对非晶态NiB/CNTs催化剂热处理使其晶化。表征了催化剂,并考察催化剂的乙炔选择性加氢性能。结果表明非晶态NiB/CNTs合金的催化性能优于晶态Ni/CNTs以及晶化NiB/CNTs催化剂的性能,其在乙炔选择性加氢反应中有较好的稳定性,连续使用650 min后乙炔转化率达80%以上。乙烷选择性随反应进行逐渐下降,最终趋于7.5%;乙烯选择性随反应进行逐渐上升,最终趋于55%。Ni/CNTs catalyst, NiB and NiB/CNTs amorphous alloy catalysts were prepared by the impregnation, chemical reduction and impregnation-chemical reduction method with ultrasonic bath, respectively. Heat treatment was carried out to crystallize NiB/CNTs amorphous alloy catalyst under highly pure nitrogen. These catalysts were characterized, and evaluated in acetylene selective hydrogenation with an atmospheric micro-reactor. Experimental results showed that catalytic activities of NiB/ CNTs amorphous alloy eatalyst were superior to these of Ni/CNTs and erystallized NiB/CNTs eatalysts, Over the NiB/CNTs amorphous alloy eatalyst, acetylene eonversion was still higher than 80 percent after 650 minutes of time-on-stream experiment that it was eatalytieally stable in the acetylene selective hydrogenation. Furthermore, the selectivity of C2H6 deercased gradually in the time-on-stream experiment and fluetuated around 7.5 percent in the long run. The selectivity of C2H4, however, increased gradually in the time-on-stream experiment and fluetuated around 55 percent in the long run.

关 键 词：碳纳米管 镍基催化剂 稳定性 乙炔选择性加氢 

分 类 号：O543.36[理学—物理]