The application of inelastic neutron scattering to investigate the 'dry' reforming of methane over an alumina-supported nickel catalyst operating under conditions where filamentous carbon formation is prevalent
The application of inelastic neutron scattering to investigate the 'dry' reforming of methane over an alumina-supported nickel catalyst operating under conditions where filamentous carbon formation is prevalent
复制标题
DOI：
10.1039/c3ra42435a
复制
发表时间：
2013-01-01
期刊：
影响因子：
3.9
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
在重整甲烷以生产工业原料合成气中使用CO2是经济上和环境上有吸引力的反应。对该反应具有活性的氧化铝负载的镍催化剂另外形成丝状碳。通过非弹性中子散射以及元素分析、程序升温氧化、程序升温加氢、X射线衍射、透射电子显微镜和拉曼散射对催化剂进行了研究。使用（CO2）-C-13代替（CO2）-C-12的同位素取代实验表明，氧化剂有助于该样品明显的碳保留。在稳态操作下，观察到95%的碳质量平衡。提出了一个动力学计划来解释所观察到的趋势。
The use of CO2 in reforming methane to produce the industrial feedstock syngas is an economically and environmentally attractive reaction. An alumina-supported nickel catalyst active for this reaction additionally forms filamentous carbon. The catalyst is investigated by inelastic neutron scattering as well as elemental analysis, temperature-programmed oxidation, temperature-programmed hydrogenation, X-ray diffraction, transmission electron microscopy and Raman scattering. Isotopic substitution experiments, using (CO2)-C-13 for (CO2)-C-12, show the oxidant to contribute to the carbon retention evident with this sample. At steady-state operation, a carbon mass balance of 95% is observed. A kinetic scheme is proposed to account for the trends observed.