Hydrogen production by steam reforming of n-butane over supported Ni and Pt-Ni catalysts
Hydrogen production by steam reforming of n-butane over supported Ni and Pt-Ni catalysts
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负载型 Ni 和 Pt-Ni 催化剂上正丁烷蒸汽重整制氢
DOI：
10.1016/j.apcata.2003.09.016
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发表时间：
2004
影响因子：
5.5
通讯作者：
Z. Önsan
中科院分区：
文献类型：
--
作者：
A. Avci;D. Trimm;A. Aksoylu;Z. Önsan
在578 ~ 678 K温度范围内，研究了Ni/δ-Al_2 O_3和Pt-Ni/δ-Al_2 O_3催化剂上正丁烷水蒸气重整反应。结果表明，Pt-Ni/δ-Al_2O_3催化剂在648 K时表现出较好的选择性制氢性能，在648 K时，催化剂的CO_2和CH_4生成量较低，表现出较好的上级性能。在648 K下，在两种催化剂上都没有观察到一氧化碳，但在678 K下产生少量一氧化碳。在所用的反应条件下没有检测到焦炭形成。两种催化剂的活性均随温度的升高而升高。在678 K时，正丁烷在Pt-Ni催化剂上完全转化，而在Ni催化剂上转化率为67%。在648 K的不同条件下对Pt-Ni/δ-Al 2 O3催化剂上的反应动力学进行了研究，得出正丁烷和水蒸气的反应级数分别为1.20和-0.18。在603- 668 K范围内，反应的活化能为80.7±7.7kJ/mol。
Steam reforming of n-butane over Ni/δ-Al2O3and Pt-Ni/δ-Al2O3catalysts was studied at temperatures between 578 and 678K. The major difference between the two catalysts was found to be at 648K, at which Pt-Ni/δ-Al2O3showed superior performance in terms of selective hydrogen production that resulted in lower carbon dioxide and methane formation. Carbon monoxide was not observed over either catalyst at 648K, but was produced in small quantities at 678K. No coke formation was detected under the reaction conditions used. Both catalysts exhibited activities increasing with temperature. At 678K, complete n-butane conversion was achieved over bimetallic Pt-Ni, while 67% conversion was obtained over Ni. Studies for evaluating reaction kinetics over the Pt-Ni/δ-Al2O3catalyst conducted under differential conditions at 648K gave reaction orders of 1.20 and −0.18 with respect to n-butane and steam, respectively. Activation energy of the reaction was found to be 80.7±7.7kJ/mol in the 603–668K range.