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首页> 外文期刊>ChemCatChem >Stable Performance of Ni Catalysts in the Dry Reforming of Methane at High Temperatures for the Efficient Conversion of CO2 into Syngas
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Stable Performance of Ni Catalysts in the Dry Reforming of Methane at High Temperatures for the Efficient Conversion of CO2 into Syngas

机译：Ni催化剂在高温下甲烷干燥重整中的稳定性能，以将CO2的有效转化为合成气

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摘要

The catalytic performance of a Ni/MgAlOx catalyst was investigated in the high temperature CO2 reforming of CH4. The catalyst was developed using a Ni, Mg, Al hydrotalcite-like precursor obtained by co-precipitation. Despite the high Ni loading of 55 wt%, the synthesized Ni/MgAlOx catalyst possessed a thermally stable microstructure up to 900 degrees C with Ni nanoparticles of 9 nm. This stability is attributed to the embedding nature of the oxide matrix, and allows increasing the reaction temperature without losing active Ni surface area. To evaluate the effect of the reaction temperature on the reforming performance and the coking behavior, two different reaction temperatures (800 and 900 degrees C) were investigated. At both temperatures the prepared catalyst showed high rates of CH4 consumption. The higher temperature promotes the stability of the catalyst performance due to mitigation of the carbon formation.
机译：在CH4的高温CO2重整中研究了Ni / Mgalox催化剂的催化性能。 使用通过共沉淀获得的Ni，Mg，Al水滑石样前体进行催化剂。 尽管Ni负载量为55wt％，但合成的Ni / Mgalox催化剂具有高达900℃的热稳定的微观结构，Ni纳米颗粒为9nm。 这种稳定性归因于氧化物基质的嵌入性质，并且允许在不损失活性Ni表面积的情况下增加反应温度。 为了评估反应温度对重整性能和焦化行为的影响，研究了两个不同的反应温度（800和900℃）。 在两个温度下，制备的催化剂显示出高速率的CH 4消耗。 较高的温度促进催化剂性能的稳定性，由于碳形成的减轻。

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