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化工进展  2015 

Ni-Mg-Al催化剂M2+/M3+比对CH4-CO2重整制合成气的影响

DOI: 10.16085/j.issn.1000-6613.2015.01.024, PP. 138-142

Keywords: 催化剂,甲烷,二氧化碳,重整

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Abstract:

考察了Ni-Mg-Al催化剂中M2+/M3+比的不同对CH4-CO2重整制合成气反应性能的影响。在质量空速12000mL/(gcat·h)、800℃条件下进行催化反应,并用X射线衍射、电子透射电镜等手段对催化剂进行了表征和分析。分析结果表明催化剂中单质与载体有很强的相互作用力并且在载体上均匀分布,同时反应过程中催化剂从单一的固溶体结构转变为固溶体-尖晶石共存结构,这有利于催化性能的提升。催化剂孔结构在反应前后也稳定存在,未发生坍塌。实验发现随着M2+/M3+比的不同,催化剂碱性强弱对其催化稳定性起着决定性作用,M2+/M3+比为3时,催化剂碱性最强,同时具有优良的抗积炭和抗烧结能力,是最佳M2+/M3+比。

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