挤条法制备负载型LaFeO_3催化剂用于CH_4氧化反应的研究  

LaFeO_3 supported catalyst prepared by extruder for methane oxidation reaction

作　　者：孙小利 周鸿刚 余长春[3] 李然家[3] 

机构地区：[1]兰州石化公司石油化工厂 [2]兰州石化公司质检部 [3]中国石油大学(北京)

出　　处：《石油与天然气化工》2012年第3期296-299,359,共4页Chemical engineering of oil & gas

基　　金：国家自然科学基金项目"甲烷氧化负载型晶格氧催化剂的研究"(20306016)

摘　　要：钙钛矿型催化剂LaFeO3用于CH4选择氧化制合成气具有良好的反应性能,但存在强度差及比表面积小的缺点。采用硝酸铝和氨水滴定制备氢氧化铝前驱体与LaFeO3活性组分机械混合,通过挤条等步骤制备了系列催化剂,并通过XRD、切换、脉冲、程序升温等反应研究了活性组分、助剂、温度等对催化剂反应性能的影响。实验测定结果表明,所制催化剂强度都高于200N/cm,且反应性能良好。Perovskite catalyst LaFeO3 for the selective oxidation of CH4 to syngas has high selectivity and methane conversion.However,the pure LaFeO3 has poor strength and very low specific surface areas.A series of perovskite catalysts were prepared by using aluminum hydroxide precursors,which was prepared by titrating aluminum nitrate solution with ammonia,then mixed with LaFeO3 and extruded by an extruder.The effects of active component content,additive,temperature on the catalyst performance were studied by means of XRD,switch reaction,pulse reaction and temperature programmed surface reaction.The results showed that mechanical strength of all the catalysts was above 200 N/cm,and these catalysts have good reactive performance.

关 键 词：LAFEO3 CH4 钙钛矿型氧化物 强度 

分 类 号：O621.2[理学—有机化学]