Carbon dioxide reforming of methane over a metal modified Ni-Al2O3 catalyst
Carbon dioxide reforming of methane over a metal modified Ni-Al2O3 catalyst
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DOI：
10.1016/j.apcata.2007.11.041
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发表时间：
2008-07-01
影响因子：
5.5
通讯作者：
Iriarte, Maria E.
中科院分区：
文献类型：
--
作者：
Luna, Adolfo E. Castro;Iriarte, Maria E.
研究了改性Ni-Al2O3对甲烷CO2重整的影响。研究了K、Sn、Mn和Ca对溶胶-凝胶法制备Ni-Al2O3催化剂行为的影响。为此，测定了其催化活性和抗结焦性。在运行30 h以上的时间里，未经改性的催化剂在甲烷干重整反应中表现出了低碳沉积和高稳定催化活性的效果。引入0.5 wt.%的上述金属，对于k改性催化剂来说，与原始催化剂相比，活性不变，但稍微降低，并且在相同的操作周期后碳沉积更低。在Ca， Mn和Sn的情况下，在研究期间观察到催化活性的急剧降低和碳沉积的显著增加。(C) 2008 Elsevier B.V.版权所有
CO2 reforming of methane over modified Ni-Al2O3 was studied. The influence of K, Sn, Mn and Ca on the behavior of a Ni-Al2O3 catalyst, prepared by a sol-gel method, was studied. For this purpose, catalytic activity and its resistance to coking were measured. The unmodified catalyst showed its effectiveness in the dry reforming reaction of methane with low carbon deposition and high and constant catalytic activity during over 30 h of operation. The introduction of 0.5 wt.% of the above mentioned metals showed, for the case of the K-modified catalyst, compared to the original catalyst, constant but slightly less activity, and a lower carbon deposition after the same operation period. In the case of Ca, Mn and Sn, a dramatic reduction of catalytic activity and a significant increase in carbon deposition were observed during the period of time under study. (C) 2008 Elsevier B.V. All rights reserved.