燃料化学学报2012，Vol.40Issue(1)：86-92,7.
制备条件对Ni/ZrO2-SiO2催化剂煤气甲烷化的影响
Effect of preparation condition on catalytic performance of Ni/ZrO2-SiO2 for methanation of coal gas
摘要
Abstract
Ni/ZrO2-SiO2 catalysts with 6% Ni loading amount were prepared by impregnation. The ZrO2-SiO2 support was also synthesized by impregnation. Effects of pH value of the impregnating solution and calcination temperature of support and catalyst on activities of Ni/ZrO2-SiO2 catalysts were investigated. The catalysts were characterized using XRD,TPR and SEM measurements. Ni/ZrO2-SiO2(S5) catalyst exhibited excellent catalytic activity with 100% of CO conversion, 1. 8% of CO2 conversion and 16. 6 (mmol-h-1 -g-1) of CH4 formation rate. The preparation conditions were as follows: pH value of the impregnating solution, 8.0 ~9.0, calcination temperature of support and catalyst, 550 t and 450 °C. The mathanation activity of Ni/ZrO2-SiO2 was strongly influenced by the ZrO2 phase change. The catalyst with tetragonal zirconia showed higher catalytic activity. The increase of pH value of the impregnating solution was in favor of forming small tetragonal zirconia. The calcination temperature of support influenced the grain size and the dispersity of NiO, unsuitable temperature might lead to ill-fitted grain size and aggregation. Exorbitant calcination temperature could weaken interaction between NiO and the support, and lowered the dispersity of NiO.关键词
镍/ZrO2 -SiO2/一氧化碳/二氧化碳/甲烷化Key words
nickel/ ZrO2-SiO2/ carbon monoxide/ carbon dioxide/ methanation分类
化学化工引用本文复制引用
刘文燕,赵安民,张海涛,应卫勇,房鼎业..制备条件对Ni/ZrO2-SiO2催化剂煤气甲烷化的影响[J].燃料化学学报,2012,40(1):86-92,7.基金项目
国家科技支撑计划课题. （）
