物理化学学报Issue(6)：1137-1144,8.DOI:10.3866/PKU.WHXB201503311
用于费托合成的骨架Co@HZSM-5核壳催化剂
Fischer-Tropsch Synthesis over Skeletal Co@HZSM-5 Core-Shell Catalysts
摘要
Abstract
We used skeletal Co as the core to prepare a skeletal Co@HZSM-5 core-shel catalyst by growing an HZSM-5 membrane on skeletal Co via hydrothermal synthesis. The physicochemical properties of the catalyst were determined using elemental analysis, N2 physisorption, X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and NH3 desorption. In gas-phase Fischer-Tropsch synthesis (FTS), the skeletal Co@HZSM-5 core-shel catalyst was more efficient than a physical y mixed skeletal Co-HZSM-5 catalyst in cracking long-chain hydrocarbons, giving higher selectivity for C5-C11 gasoline products. The thickness of the zeolite shel on the skeletal Co@HZSM-5 core-shel catalyst was easily tuned by adjusting the hydrothermal time. At a suitable zeolite shel thickness, the long-chain hydrocarbons were cracked completely, with high FTS activity, leading to high selectivity for the gasoline fraction. Increasing the reaction temperature resulted in higher FTS and cracking activities, but the product distribution shifted to short-chain hydrocarbons. For the optimum skeletal Co@HZSM-5 core-shel catalyst, which was subjected to hydrothermal treatment for 4 d, selectivity for the gasoline fraction reached 79%at 250 °C, which shows an excel ent synergistic effect between the FTS active sites and the acidic sites on this catalyst.关键词
骨架Co/HZSM-5/分子筛/核壳结构/费托合成Key words
Skeletal Co/HZSM-5/Zeolite/Core-shel structure/Fischer-Tropsch synthesis分类
化学化工引用本文复制引用
许可,程义,孙博,裴燕,闫世润,乔明华,张晓昕,宗保宁..用于费托合成的骨架Co@HZSM-5核壳催化剂[J].物理化学学报,2015,(6):1137-1144,8.基金项目
The project was supported by the National Key Basic Research Program of China (973)(2012CB224804), National Natural Science Foundation of China (21373055), and Science and Technology Commission of Shanghai Municipality, China (08DZ2270500).国家重点基础研究发展规划项目(973)(2012CB224804),国家自然科学基金(21373055)及上海市科委科技基金(08DZ2270500)资助 （973）
