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首页> 外文期刊>Catalysis science & technology >Simultaneous activity and stability increase of co-precipitated Ni-Al CO2 methanation catalysts by synergistic effects of Fe and Mn promoters
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Simultaneous activity and stability increase of co-precipitated Ni-Al CO2 methanation catalysts by synergistic effects of Fe and Mn promoters

机译：同时活动和稳定增长共沉淀Ni-Al二氧化碳甲烷化催化剂铁和锰的协同效应启动子

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摘要

For CO2 methanation, the development of highly active and thermostable catalysts is indispensable to cope with the demands of SNG purity in single-pass fixed-bed operation and the exothermal character of the reaction. In this work, a co-precipitated NiAlOx catalyst with an equimolar Ni/Al ratio is modified by the two promoters Mn and Fe. The combination of both dopants can be used to synthesize highly thermostable catalysts with an enhanced catalytic activity. The activity-stability performance is strongly dependent on the Ni/promoter ratios, with Ni/Mn = 9.5 and Ni/Fe = 7 performing best. Besides doping already during co-precipitation, it is shown that for doping via impregnation the activity-stability performance for a constant Ni/Fe/Mn ratio can be influenced by the preparation procedure. This offers the unique opportunity to target the activity-stability behavior of a co-precipitated NiAlOx catalyst as required.
机译：二氧化碳甲烷化,高度的发展积极和耐热性的催化剂不可或缺的应对合成天然气的需求和纯度的单次的固定床操作反应的放热特性。工作,共沉淀NiAlOx催化剂克分子数相等的镍/铝比由两个修改发起人锰和铁。掺杂物可用于合成高度耐热性的催化剂和一个增强的催化活动。强烈依赖于Ni /促进剂比例,与Ni / Mn = 9.5和镍/铁= 7表现最好的。除了兴奋剂已经在共同沉淀,结果表明,掺杂通过浸渍活性稳定性表现为一个常数镍/铁/锰比能的影响制备过程。针对活性稳定性的机会行为的共沉淀NiAlOx催化剂必需的。

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