摘要
考察了三种NiO-MgO催化剂制备方法对CH_4直接氧化制合成气反应催化性能的影响,其中,以负载型催化剂为最佳;在850℃、0.1MPa、CH_4/O_2比为1.85条件下,当NiO含量为11%、CH_4空速1.0×10~5h^(-1)时,CH_4转化率达93%,CO选择性95%,H_2选择性91%。当NiO含量为16%、CH_4空速为3.0×10~5h^(-1)时,转化率和选择性分别为88%、94%和90%。实验结果表明,反应包括了直接转化和通过生成CO_2和H_2O中间产物两种机理。
The effects of three methods of NiO-MgO preparation on the catalytic action were investigated in direct oxidation of methane to H2 and CO. The results showed that supported catalysts were the best. Under the following conditions; temperature 850℃ , pressure 0. lMPa,CH4/O2 1. 85. NiO content.11%(mass), and CH4 space velocity 1.0×105, CH4 conversion,CO and H2 selectivi-ties were respectively 93%,95% and 91%; and when NiO content was 16%(mass) and CH4 space velocity was 3. 0×105,the conversion and selectivities were respectively 88%, 94% and 90%. It was suggested that both the two mechanisms of CH4 direct conversion to CO + H2 and CH4 conversion to CO+H2 via the intermediate products (CO2 + H2O) were included in the reaction.
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
1996年第4期9-11,共3页
Natural Gas Chemical Industry
