摘要
采用浸渍法在块状大孔α-氧化铝载体上负载活性组合,考察了浸渍时间、浸渍前载体的状态等因素对载体负载活性组份的影响。为了获得用于气液反应中既具有大的液固表面而催化剂内部扩散距离较小,且催化剂易于分离的新型催化体系,进一步研究了在负载了活性金属镍颗粒的块状大孔α-氧化铝上气相催化分解乙烯生长具有较大比表面积、疏松的纳米碳纤维(CNF)层,纳米碳纤维直径为10-20nm。本文制备的CNF/α-A l2O3在气液非均相催化反应中有很好的应用前景。
Active component was supported on large macro-porous α-alumina by impregnation method. The effects of impregnation time and the state of the support on the active component were investigated. In order to obtain a catalyst with large liquid-solid surface area as well as short diffusion distance inside it without needing difficult separation step,a highly porous,high surface area car- bon nanofiber washcoat was grown on this a-alumina support by ethylene catalytic decomposition over small nickel particles. The carbon nanofiber washcoat owns its diameter of 10 to 20 nanometers. Such carbon nanofiber washcoat on α-alumina could potentially find applications as catalyst support or directly as catalyst used in gas-liquid catalytic reactions.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2006年第9期1077-1080,1083,共5页
Chemical Research and Application
基金
湖南省教育厅资助科研项目(04B060)
关键词
浸渍法
Α-氧化铝
纳米碳纤维
气液催化反应
气相催化分解
impregnation
α-alumina
carbon nanofiber
gas-liquid catalytic reaction
gas phase catalytic decmposition
