Fischer-Tropsch Synthesis over Skeletal Co@HZSM-5 Core-Shell Catalysts
Fischer-Tropsch Synthesis over Skeletal Co@HZSM-5 Core-Shell Catalysts
复制标题
骨架Co@HZSM-5核壳催化剂的费托合成
DOI：
10.3866/pku.whxb201503311
复制
发表时间：
2015
影响因子：
10.9
通讯作者：
Zong Bao-Ning
中科院分区：
文献类型：
--
作者：
Xu Ke;Cheng Yi;Sun Bo;Pei Yan;Yan Shi-Run;Qiao Ming-Hua;Zhang Xiao-Xin;Zong Bao-Ning
以骨架钴为核，采用水热合成法在骨架钴上生长HZSM-5膜，制备了骨架钴@HZSM-5核壳催化剂。采用元素分析、氮气物理吸附、X-射线粉末衍射、扫描电子显微镜、氨解吸等手段对催化剂的物化性能进行了表征。在气相Fischer-Tropsch合成(FTS)中，骨架Co@HZSM-5核壳催化剂比物理混合骨架Co-HZSM-5催化剂对长链烃的裂解效率更高，对C5-C11汽油产品有更高的选择性。骨架结构的Co@HZSM-5核壳催化剂的沸石壳层厚度可以通过调节水热时间来调节。在合适的沸石壳层厚度下，长链烃完全裂解，具有较高的FTS活性，汽油馏分选择性高。提高反应温度会导致更高的反应温度
We used skeletal Co as the core to prepare a skeletal Co@HZSM-5 core-shell 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-shell catalyst was more efficient than a physically mixed skeletal Co-HZSM-5 catalyst in cracking long-chain hydrocarbons, giving higher selectivity for C5-C11 gasoline products. The thickness of the zeolite shell on the skeletal Co@HZSM-5 core-shell catalyst was easily tuned by adjusting the hydrothermal time. At a suitable zeolite shell 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