Nickel/alumina catalysts modified by basic oxides for the production of synthesis gas by methane partial oxidation
Nickel/alumina catalysts modified by basic oxides for the production of synthesis gas by methane partial oxidation
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DOI：
10.1016/j.cattod.2006.05.084
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发表时间：
2006-08
期刊：
影响因子：
5.3
通讯作者：
J. Requies;M. A. Cabrero;V. L. Barrio;J. Cambra;M. B. Güemez;P. Arias;V. Parola;M. Peña;J. Fierro
中科院分区：
文献类型：
--
作者：
J. Requies;M. A. Cabrero;V. L. Barrio;J. Cambra;M. B. Güemez;P. Arias;V. Parola;M. Peña;J. Fierro
采用不同量的CaO和MgO改性Ni/α- al2o3催化剂，通过甲烷催化部分氧化（CPO）和湿式CPO制氢。在湿式cpo工艺中，在反应器进料中加入少量的水，以提高h2产率和甲烷转化率。水的加入也是有益的，因为焦炭的形成在热力学上是不利的。采用XRD、XPS、TPR、TPO等技术对反应前后的催化剂进行了表征。为了将金属位点在缺氧条件下活化甲烷的能力与CPO和湿-CPO反应的性能联系起来，进行了几项甲烷分解试验和甲烷脉冲实验。
In the present work, Ni/α-Al2O3catalysts modified with different amounts of CaO and MgO were used for the production of hydrogen by catalytic partial oxidation (CPO) and wet-CPO processes of methane. In the wet-CPO process, small additions of water were introduced into the feed of the reactor to improve both the H2yield and methane conversion. The addition of water is also beneficial because coke formation becomes thermodynamically unfavorable. The catalysts were characterized before and after the reaction with XRD, XPS, TPR and TPO techniques. Several methane decomposition tests and methane pulse experiments were carried out with a view to correlating the ability of metal sites to activate methane in the absence of oxygen with the performance for CPO and wet-CPO reactions.