CO2-REFORMING OF METHANE OVER TRANSITION-METALS
CO2-REFORMING OF METHANE OVER TRANSITION-METALS
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DOI：
10.1006/jcat.1993.1312
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发表时间：
1993-11-01
影响因子：
7.3
通讯作者：
HANSEN, JHB
中科院分区：
文献类型：
--
作者：
ROSTRUPNIELSEN, JR;HANSEN, JHB
比较了Ni、Ru、Rh、Pd、Ir和Pt系催化剂在甲烷二氧化碳重整反应中的平衡、重整活性和成炭性能。以及碳形成的选择性。用二氧化碳代替水蒸气对重整机理没有显著影响。所有催化剂的甲烷裂解平衡常数均小于石墨基催化剂，对贵金属的影响最大。Ru和Rh对无碳操作表现出较高的选择性，这可以归因于高的重整速率和低的碳生成速率。硫钝化镍催化剂也能获得类似的高选择性。
Catalysts based on Ni, Ru, Rh, Pd, Ir, and Pt are compared for CO2-reforming of methane by studying the equilibrium for methane decomposition, the activity for reforming, and carbon formation. as well as the selectivity for carbon formation. Replacing steam by carbon dioxide has no significant impact on the reforming mechanism. All catalysts show smaller equilibrium constants for methane decomposition than that based on graphite, the effect being largest for the noble metals. Ru and Rh show high selectivity for carbon-free operation, which can be ascribed to high reforming rates combined with low carbon formation rates. Similar high selectivity can be achieved with a sulfur-passivated nickel catalyst.