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焙烧温度对NiO/δ-Al2O3催化剂性能的影响
引用本文:周振华,张爱莲,龚茂初,陈耀强.焙烧温度对NiO/δ-Al2O3催化剂性能的影响[J].化学研究与应用,2000,12(5):521-524.
作者姓名:周振华  张爱莲  龚茂初  陈耀强
作者单位:四川大学化学学院,四川,成都,610064
基金项目:中国科学院资助项目,科技部科研项目,29773028,G1999022407,,
摘    要:应用XRD,TPR,H2-TPD技术研究焙烧温度对NiO/δ-Al2O3催化剂性能的影响。结果表明,随着焙烧温度的增高,NiO与载体Al2O3之间相互作用逐渐增强,直至最后生成NiAl2O4尖晶石。同时表明,随着焙烧温度的提高,催化剂的还原温度明显增高。另外,TPR结果还表明NiAl2O4仅仅是与载体发生强相互作用的那部分NiO进一步进入Al2O3晶格的结果,而游离态的NiO不参与形成NiAl2O

关 键 词:氧化镍/δ-Al2O3  甲烷部分氧化  合成气  催化剂
修稿时间:2000-05-12

EFFECTS ON NICKEL-ALUMINA CATALYSTS OF CALCINATION TEMPERATURE
ZHOU Zhen-hua,ZHANG Ai-lian,GONG Mao-chu,CHEN Yao-qiang.EFFECTS ON NICKEL-ALUMINA CATALYSTS OF CALCINATION TEMPERATURE[J].Chemical Research and Application,2000,12(5):521-524.
Authors:ZHOU Zhen-hua  ZHANG Ai-lian  GONG Mao-chu  CHEN Yao-qiang
Abstract:A study of effects on nickel alumina catalysts of calcination temperature was carried out by using X rays diffreaction,TPR and H 2 TPD.Results show that free NiO reduces readily to form Ni crystallites,whereas NiAl 2O 4 reduces with difficulty.The TPR profiles also suggested that NiAl 2O 4 was formed by reaction with NiO that interacts strongly with support,namely,fixed NiO,instead of free NiO.The catalytic performance for partial oxidation of methane to syngas over nickel alumina catalysts calcined in different temperature is presented.The results demonstrate that partial oxidation of methane to syngas calls for the presence of metallic nickel sites.Therefore,high temperature calcination is undesirable for the utilization of nickel alumian catalysts in the partial oxidation of methane to syngas.
Keywords:nickel  alumina  methane  partial oxidation  syngas  
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