Combined Use of Synchrotron-Radiation-Based Imaging Techniques for the Characterization of Structured Catalysts
Combined Use of Synchrotron-Radiation-Based Imaging Techniques for the Characterization of Structured Catalysts
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DOI：
10.1002/adfm.201001004
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发表时间：
2010-12-08
影响因子：
19
通讯作者：
Vaccari, Angelo
中科院分区：
文献类型：
--
作者：
Basile, Francesco;Benito, Patricia;Vaccari, Angelo
活性相涂覆的金属载体作为结构化催化剂在吸热和放热过程中越来越受到关注，因为它们改善了传热。在金属载体上沉积粘附良好且稳定的催化剂层是最终材料成功应用的重要特征。在这项工作中，涂层的FeCrAlY泡沫进行一步电合成沉积的水滑石型化合物，催化剂的前体在吸热蒸汽甲烷重整。催化剂研究在不同的长度尺度上使用，第一次，几种技术的组合：SEM/EDS和X射线荧光，X射线粉末衍射和吸收断层扫描实验的微米和纳米尺度上的同步加速器设施。结果表明，涂层的形貌取决于合成条件，催化剂可以描述为Ni金属微晶分散在γ-Al_2 O_3上，均匀地涂覆在FeCrAlY泡沫上。
Active-phase-coated metallic supports as structured catalysts are gaining attention in endothermic and exothermic processes because they improve heat transfer. The deposition of a well-adhered and stable catalyst layer on the metallic support constitutes an important feature for the successful application of the final material. In this work, coating of FeCrAlY foams is performed by a one-step electrosynthesis-deposition of hydrotalcite-type compounds, precursors of catalysts active in endothermic steam methane reforming. The catalysts are studied at different length scales by using, for the first time, a combination of several techniques: SEM/EDS and X-ray fluorescence, X-ray powder diffraction and absorption-tomography experiments on the micro- and nanoscales at a synchrotron facility. The results show that the morphology of the coating depends on the synthesis conditions and that the catalyst may be described as Ni metal crystallites dispersed on. gamma Al2O3, homogeneously coating the FeCrAlY foam.