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首页> 外文期刊>International journal of hydrogen energy >Selective hydrogenation of ethylene carbonate to methanol and ethylene glycol over Cu/SiO2 catalysts prepared by ammonia evaporation method
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Selective hydrogenation of ethylene carbonate to methanol and ethylene glycol over Cu/SiO2 catalysts prepared by ammonia evaporation method

机译：氨蒸发法制备的Cu / SiO2催化剂上碳酸亚乙酯选择性加氢制甲醇和乙二醇

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摘要

A series of Cu/SiO2-AE catalysts with different copper loadings were prepared by ammonia evaporation method with silica sol as the silica source. The systematic catalyst characterization revealed that different proportions of Cu degrees and Cu+ species co-existed in the Cu/SiO2-AE catalysts, which derived from the reduction of CuO and copper phyllosilicate, respectively. The as-prepared catalysts were employed in the hydrogenation of ethylene carbonate (EC) to co-produce methanol (MeOH) and ethylene glycol (EG). Among the catalysts investigated, the 10%Cu/SiO2-AE catalyst with a moderate copper loading exhibited better catalytic activity and product selectivities, which was mainly ascribed to the synergetic effect of Cu degrees and Cu+ species and the suitable proportion of Cu+/(Cu++Cu degrees). It was proposed that the Cu degrees species promoted the dissociation of H-2, while Cu+ species adsorbed on the carbonyl group of EC. Under the optimized conditions, EC conversion of 100%, MeOH selectivity of 70.8% and EG selectivity of 98.0% were obtained over the 10%Cu/SiO2-AE catalyst. The catalyst reusability results showed that the agglomeration of Cu and Cu2O particles was responsible for the gradually decreasing activity of 10%Cu/SiO2-AE catalyst along with recycling runs. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
机译：采用氨水蒸发法以硅溶胶为二氧化硅源，制备了一系列铜负载量不同的Cu / SiO2-AE催化剂。系统的催化剂表征表明，Cu / SiO2-AE催化剂中共存不同比例的Cu度和Cu +物种，这分别来自CuO和页硅酸铜的还原。所制备的催化剂用于碳酸亚乙酯（EC）的加氢中，以共同生产甲醇（MeOH）和乙二醇（EG）。在所研究的催化剂中，中等铜含量的10％Cu / SiO2-AE催化剂表现出更好的催化活性和产物选择性，这主要归因于Cu度和Cu +种类的协同作用以及合适的Cu + /（Cu ++ Cu度）。有人认为，Cu物种促进H-2的解离，而Cu +物种吸附在EC的羰基上。在最佳条件下，相对于10％Cu / SiO2-AE催化剂，获得了100％的EC转化率，70.8％的MeOH选择性和98.0％的EG选择性。催化剂的可重复使用性结果表明，Cu和Cu2O颗粒的团聚是10％Cu / SiO2-AE催化剂随着循环运行逐渐降低活性的原因。 （C）2016氢能出版物有限公司。由Elsevier Ltd.出版。保留所有权利。

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  • 来源
    《International journal of hydrogen energy》 |2017年第4期|2144-2156|共13页
  • 作者

    Li Fengjiao; Wang Liguo; Han Xiao; Cao Yan; He Peng; Li Huiquan;

  • 作者单位

    Chinese Acad Sci, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Beijing 100190, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Beijing 100190, Peoples R China|Yancheng Inst Technol, Key Lab Adv Technol Environm Protect Jiangsu Prov, Jiangsu Collaborat Innovat Ctr Ecol Bldg Mat & En, Yancheng 224051, Peoples R China;

    Chinese Acad Sci, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Beijing 100190, Peoples R China;

    Chinese Acad Sci, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Beijing 100190, Peoples R China;

    Chinese Acad Sci, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Beijing 100190, Peoples R China;

    Chinese Acad Sci, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Beijing 100190, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Hydrogenation; Ethylene carbonate; Methanol; Ethylene glycol; Copper catalyst;

    机译：加氢;碳酸亚乙酯;甲醇;乙二醇;铜催化剂;

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