| 张亮亮,汪镭,陈霄,李闯,马保军,梁长海.Co2Si@C催化剂的合成及其加氢脱硫性能[J].分子催化,2020,34(2):116-124 |
| Co2Si@C催化剂的合成及其加氢脱硫性能 |
| Synthesis of Co2Si@C and Its Catalytic Performance in the Hydrodesulphurization of Dibenzothiophene |
| 投稿时间：2020-02-15 修订日期：2020-02-24 |
| DOI： |
| 中文关键词: 微波法 硅化钴 加氢脱硫 二苯并噻吩 |
| 英文关键词:microwave cobalt silicide hydrodesulphurization dibenzothiophene |
| 基金项目:晋中学院"1331工程"重点创客研究团队（jzxycktd2019032）；山西省"1331工程"重点创新研究团队（PY201817）；2019年宁夏回族自治区重点研发计划（对外科技合作专项）项目（2019BFH02015） |
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| 中文摘要: |
| 采用微波法制备了Co2Si@C催化剂并对其在加氢脱硫反应中的催化性能进行了研究.通过XRD、XPS、TEM和N2-物理吸附表征分析Co2Si@C催化剂的组成和结构.Co2Si@C催化剂具有一致的介孔结构，高钴含量（21%）、高比表面积（116.6 m2·g-1）和均匀分布的纳米粒子.由于硅原子对钴原子结构和参数的修饰、纳米粒子效应和高金属含量等因素，Co2Si@C催化剂在温和的反应条件下（340℃和3.0 MPa）具有良好的加氢脱硫活性和对直接脱硫（DDS）反应途径的高选择性，产物联苯的选择性超过了60%. |
| 英文摘要: |
| Co2Si@C catalyst has been rapidly synthesized via a microwave-assisted pyrolysis route and applied for the hydrodesulphurization of dibenzothiophene. The synthesized Co2Si@C catalyst was analyzed and characterized by X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy-energy and nitrogen adsorption-desorption. Co2Si@C catalyst possesses an ordered and uniform mesoporous structure, high cobalt content (21%), high specific surface area (117 m2·g-1) and small nanoparticles (8~12 nm). Owing to the strong modification of structure and properties by silicon, the nanoparticle size effect, and high cobalt content, the Co2Si@C catalyst exhibited good activity and high selectivity to DDS under mild reaction conditions (340℃ and 3.0 MPa), in which the selectivity to diphenyl (BP) is more than 60%. |
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