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《Coal Conversion》 2012-04
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He Long Wang Yonggang Gong Weibo Xu Deping Yang Fangfang and Zhang Haiyong(School of Chemical and Environmental Engineering,China University of Mining and Technology,100083 Beijing)  
Effects of the calcination temperatures on the activity of Ni-SiO2 for catalyzing methanation reaction was studied.The experiments were conducted in a slurry bed reactor.The prepared catalysts were characterized by TPR,XRD and BET.The results showed that the active species Ni in catalysts could completely form NiO at 350 ℃.The calcined temperature was a very important factor,affecting both catalyst's specific area and particle size of active species.The particle sizes of active components increased while the specific surface area decreased as calcination temperature increased.However,the CH4 yield from the catalysts increased and then decreased with increasing the calcination temperature from 350 ℃ to 700 ℃.It illustrated that,for the experimental conditions examined,the optimal calcination temperatures of Ni-SiO2 catalyst were among 450 ℃-550 ℃,and higher or lower than that would reduce the catalytic activity.
【Fund】: 中国矿业大学(北京)中央高校基本科研业务费专项资金项目(2010yh13)
【CateGory Index】: TQ546
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