摘要
采用固定床流动反应装置，考察了NiO（Ni：9．17wt％）／Al2O3镍负载型催化剂上甲烷、二氧化碳和氧气转化制合成气反应。结果表明，反应温度≥700℃时，基本达到热力学平衡；空速介于1．5－9．5×104h－1之间，反应活性基本不变。而反应温度≤650℃时，反应活性首先随空速的增加而增加，达一最大值后，空速继续增加，活性不增加反而下降。该催化剂在850℃，CH4／CO2／O2＝1／1／0．5，空速1400h－1条件下连续运行1000h，其活性一直保持在89％左右，具有良好的稳定性。
The catalytic activity of reaction of methane with carbon dioxide and oxygen to syngas over nickel loaded catalyst was studied by using a fixed-bed flow apparatus.The results showed that the reaction approaches thermodynamic equilibrium above 700℃ for CH4/CO2/O2 ratio of 6/5/3 at the space velocity of 1.5-9.0×104h-1 over NiO (Ni: 9.17wt%)/Al2O3 catalyst, by comparing the results of experiment and thermodynamic calculation. With the increasing space velocity, the catalytic activity first increased, then dereased when the reaction temperature was below 650℃. The instantaneous activity of conversion of methan with carbon dioxide and oxygen to syngas over NiO (Ni:9.17wt%)/Al2O3 catalyst during 1000h reaction was examined. The catalytic activity always kepe-89% during 1000h reaction for CH4/CO2/O2 ratio of 1/1/0.5 at 850℃. The result illustheted that the catalyst has high catalytic activity and stability.
出处
《石油与天然气化工》
CAS
CSCD
北大核心
1999年第1期9-10,共2页
Chemical engineering of oil & gas
关键词
甲烷
二氧化碳
氧气转化
合成气
催化剂
conversion of methane with carbon dioxide and oxygen, syngas, NiO/Al_2O_3 catalyst
