The application of inelastic neutron scattering to investigate the steam reforming of methane over an alumina-supported nickel catalyst
The application of inelastic neutron scattering to investigate the steam reforming of methane over an alumina-supported nickel catalyst
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DOI：
10.1016/j.chemphys.2013.10.012
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发表时间：
2013-12-12
期刊：
影响因子：
2.3
通讯作者：
Lennon, David
中科院分区：
文献类型：
--
作者：
McFarlane, Andrew R.;Silverwood, Ian P.;Lennon, David
氧化铝负载的镍催化剂，以前用于甲烷重整实验中使用CO2作为氧化剂，在这里应用于蒸汽重整的方法的变化。微反应堆实验是用来辨别与非弹性中子散射（INS）实验设计的样品池兼容的操作窗口。在898 K下，CH_4和H_2O的1：1混合物反应6 h后，记录INS光谱。观察到弱INS光谱，表明在该操作方案中催化剂的氢保留最小。反应后，通过粉末X射线衍射、透射电子显微镜和拉曼散射进一步表征催化剂。与“干”重整实验中所见的方式类似，催化剂以丝状焦炭的形式保留了大量的碳。被简要地认为是由催化剂的氢掺入的作用。(C)2013年爱思唯尔B。V.保留所有权利。
An alumina-supported nickel catalyst, previously used in methane reforming experiments employing CO2 as the oxidant, is applied here in the steam reforming variant of the process. Micro-reactor experiments are used to discern an operational window compatible with sample cells designed for inelastic neutron scattering (INS) experiments. INS spectra are recorded after 6 h reaction of a 1: 1 mixture of CH4 and H2O at 898 K. Weak INS spectra are observed, indicating minimal hydrogen retention by the catalyst in this operational regime. Post-reaction, the catalyst is further characterised by powder X-ray diffraction, transmission electron microscopy and Raman scattering. In a comparable fashion to that seen for the 'dry' reforming experiments, the catalyst retains substantial quantities of carbon in the form of filamentous coke. The role for hydrogen incorporation by the catalyst is briefly considered. (C) 2013 Elsevier B. V. All rights reserved.