• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Surface Science >Surface modification of HMS material with silica sol leading to a remarkable enhanced catalytic performance of Cu/SiO_2
【24h】

Surface modification of HMS material with silica sol leading to a remarkable enhanced catalytic performance of Cu/SiO_2

机译：用硅溶胶对HMS材料进行表面改性，从而显着增强了Cu / SiO_2的催化性能

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Cu/SiO_2 catalysts with different bimodal pore structures adjusted by the ratio of HMS and silica sol were prepared via modified impregnation method. Structure evolutions of the catalyst were systematically characterized by N_2-physisorption, X-ray diffraction, H_2 temperature-programmed reduction, N_2O titra-tion and X-ray photoelectron spectroscopy. The results show that the composite silica supported copper catalysts showed remarkably enhanced catalytic performance in the selective hydrogenation of dimethyl oxalate to ethylene glycol compared to the individual silica supported ones obtained by the same method. The dimethyl oxalate conversion and the ethylene glycol selectivity can reach 100% and 98% at 473 K with 2.5 MPa H_2 pressure and 1.5 h~(-1) liquid hour space velocity of dimethyl oxalate over the optimized Cu/SiO_2 catalyst. The remarkably enhanced catalytic performance of Cu/SiO_2 catalysts might be attributed to the homogeneous dispersion and uniformity of the active copper species and to the larger copper surface areas attained on the HMS supports with large pore diameters and surface areas.
机译：通过改进的浸渍法制备了通过HMS和硅溶胶的比例调节的具有不同双峰孔结构的Cu / SiO_2催化剂。通过N_2-物理吸附，X射线衍射，H_2程序升温还原，N_2O滴定和X射线光电子能谱系统地表征了催化剂的结构演变。结果表明，与通过相同方法获得的单独的二氧化硅负载的催化剂相比，复合二氧化硅负载的铜催化剂在草酸二甲酯的选择性加氢为乙二醇中显示出显着增强的催化性能。在优化的Cu / SiO_2催化剂上，在2.5 MPa H_2压力和1.5 h〜（-1）液时空速下，在473 K下草酸二甲酯的转化率和乙二醇选择性可以达到100％和98％。 Cu / SiO_2催化剂的显着提高的催化性能可能归因于活性铜物质的均匀分散和均匀性，以及在HMS载体上获得的具有较大孔径和表面积的较大铜表面积。

著录项

  • 来源
    《Applied Surface Science》 |2011年第13期|p.5844-5849|共6页
  • 作者

    Anyuan Yin; Chao Wen; Wei-Lin Dai; Kangnian Fan;

  • 作者单位

    Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 220# Handan Road, Shanghai 200433, PR China;

    Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 220# Handan Road, Shanghai 200433, PR China;

    Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 220# Handan Road, Shanghai 200433, PR China;

    Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 220# Handan Road, Shanghai 200433, PR China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Surface modification; Cu/HMS catalyst; Hydrogenation of dimethyl oxalate; Ethylene glycol; Hierarchical pore structure;

    机译：表面改性;Cu / HMS催化剂;草酸二甲酯加氢;乙二醇;分层孔结构;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号