催化学报 ›› 2013, Vol. 34 ›› Issue (8): 1496-1503.DOI: 10.1016/S1872-2067(12)60607-X

• 研究论文 • 上一篇    下一篇

微米及纳米丝光沸石分子筛上二甲醚羰基化反应的积碳分析

薛会福a, 黄秀敏a, Evert Ditzelb, 展恩胜a, 马猛a, 申文杰a   

  1. a 中国科学院大连化学物理研究所催化基础国家重点实验室, 辽宁大连116023;
    b Hull Research and Technology Centre, BP Chemicals Limited, Hull HU128DS, UK
  • 收稿日期:2013-03-25 修回日期:2013-04-26 出版日期:2013-08-16 发布日期:2013-07-30
  • 通讯作者: 申文杰
  • 基金资助:

    国家重点基础研究发展计划(2013CB933100); 国家自然科学基金(20973166).

Coking on micrometer- and nanometer-sized mordenite during dimethyl ether carbonylation to methyl acetate

Huifu Xuea, Xiumin Huanga, Evert Ditzelb, Ensheng Zhana, Meng Maa, Wenjie Shena   

  1. a State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
    b Hull Research and Technology Centre, BP Chemicals Limited, Hull HU128DS, UK
  • Received:2013-03-25 Revised:2013-04-26 Online:2013-08-16 Published:2013-07-30
  • Supported by:

    This work was supported by the National Basic Research Program of China (2013CB933100) and the National Natural Science Foundation of China (20973166).

摘要: 对比研究了在传统微米尺寸和新结构纳米丝光沸石催化剂上二甲醚羰基化合成乙酸甲酯的反应行为.结果表明,通过减小分子筛的尺寸到纳米水平,可以有效提高反应物和产物到达或者脱离反应活性位的效率,从而提高了二甲醚的转化率;更重要的是,抑制了硬积碳的生成,使催化剂保持了更高的稳定性.

关键词: 氢型丝光沸石, 二甲醚, 羰基化, 晶体尺寸, 积碳

Abstract: As compared to conventional micrometer-sized mordenite particles, nanometer-sized mordenite gave a much higher activity and better stability in dimethyl ether carbonylation to methyl acetate by suppressing the deposition of hard coke. A structural analysis revealed that intra-crystalline diffusion limitation of the reactants and products to and from the active sites inside the channels was greatly decreased by reducing the zeolite size to the nanometer size.

Key words: H-mordenite, Dimethyl ether, Carbonylation, Crystal size, Coking