论文部分内容阅读
采用浸渍 还原法制备的Ni/MgO/Al2 O3 在CH4 与CO2 重整制合成气反应中显示出良好的催化性能和一定的抗积炭能力 ;在 10 2 3K下流动反应气氛中连续运转 10 0h ,未见活性下降 ,CH4 及CO2 转化率均为 90 %左右 ,CO收率高于 90 % .实验还发现 ,CH4 转化率随着原料气中CO2 浓度的增加而升高 ,当V(CO2 ) /V(CH4) =2时 ,CH4 转化率可达 10 0 % .通过BET比表面积测定及XRD ,TEM等分析手段 ,比较了浸渍 还原和浸渍 焙烧 还原两种制备方法对催化剂活性的影响 .结果表明 ,与浸渍 焙烧 还原法相比 ,浸渍 还原法制备的Ni催化剂在载体表面的分散更好 ,活性更高
The Ni / MgO / Al 2 O 3 prepared by impregnation and reduction showed good catalytic performance and certain anti-carbon deposition ability in the reaction of CH 4 with CO 2 reforming syngas; continuous operation was carried out in flowing reaction atmosphere at 10 2 3 K for 10 0 h , No decrease in activity, CH4 and CO2 conversion rates were about 90%, CO yield was higher than 90% .Experiments also found that, CH4 conversion rate increases with the increase of CO2 concentration in the feed gas, when V (CO2) (CH4) = 2, the conversion of CH4 can reach 100% .Through the BET specific surface area measurement and XRD, TEM and other analytical means, the effects of impregnation and impregnation roasting reduction on the catalyst activity were compared. Results It shows that the Ni catalyst prepared by impregnation-reduction method has better dispersion and higher activity on the surface of the support than the impregnation-roasting method