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OALib Journal期刊
ISSN: 2333-9721
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焦炉煤气二氧化碳重整制合成气中La0.6Sr0.4NixCo1-xO3钙钛矿催化剂的合成、表征和催化性能研究
DOI: 10.1016/S1872-2067(14)60303-X, PP. 915-924
Keywords: 合成气,催化活性,钙钛矿,干重整,焦炉煤气,积碳
Abstract:
？采用溶胶凝胶法制备了La0.6Sr0.4NixCo1-xO3钙钛矿催化剂,并测试了该催化剂在焦炉煤气CO2重整反应中的性能.通过X射线衍射、N2吸附脱附、程序升温还原、扫描电镜、透射电镜和热重-微分扫描量热等方法对催化剂进行了表征.结果表明,溶胶凝胶法合成的La0.6Sr0.4NixCo1-xO3催化剂形成了钙钛矿结构的固溶体.着重考察了钙钛矿催化剂焙烧温度和A位Ni的掺杂含量对其催化性能和反应后积碳的影响.结果表明:La0.6Sr0.4NixCo1-xO3钙钛矿催化剂在反应中生成了活性金属Ni,Co颗粒和La2O2CO3,这些组分对催化剂的活性和稳定性起关键性的作用,并且能够抑制积碳的形成;焦炉煤气中的富氢气体具有抑制甲烷裂解反应发生的作用,从而减少催化剂的积碳.
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