English  |  正體中文  |  简体中文  |  Items with full text/Total items : 70585/70585 (100%)
Visitors : 23066425      Online Users : 454
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version


    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/26426


    Title: Selective hydrogenation of alpha,beta-unsaturated aldehydes over Au/MgxAlO hydrotalcite catalysts
    Authors: You,KJ;Chang,CT;Liaw,BJ;Huang,CT;Chen,YZ
    Contributors: 化學工程與材料工程學系
    Keywords: TEMPERATURE CO OXIDATION;SUPPORTED AU CATALYSTS;GAS SHIFT REACTION;LIQUID-PHASE HYDROGENATION;GOLD CATALYSTS;OXIDE CATALYSTS;CROTONALDEHYDE HYDROGENATION;PRETREATMENT CONDITIONS;PLATINUM CATALYSTS;AU/TIO2 CATALYSTS
    Date: 2009
    Issue Date: 2010-06-29 17:27:47 (UTC+8)
    Publisher: 中央大學
    Abstract: Liquid-phase reduction of alpha,beta-unsaturated aldehydes (UALs) to the corresponding alpha,beta-unsaturated alcohols (UOLs) was investigated on gold catalysts supported on a solid base of MgxAlO hydrotalcite (x = Mg/Al molar ratio). The Au/MgxAlO catalysts were prepared using a modified deposition precipitation method without adjusting the pH of the initial HAuCl4 solution. The effects of various parameters involved in preparation of catalysts were also studied, including the Mg/Al molar ratio and the calcination temperatures of the MgxAlO support and Au/MgxAlO catalyst. The Mg/Al ratio of MgxAlO affected the pH of the final solution, and determined the actual gold loading in the catalyst. Calcination temperatures of the MgxAlO support and Au/MgxAlO catalyst determined the ratio of gold states (Au3+/Au-0) on the catalyst. A correlation between the gold states (Au3+/Au-0) and the activity and selectivity of UAL to UOL was found. Increasing the Au3+/Au-0 ratio of the catalysts increased the activity and selectivity of UAL to UOL. The different performances of the Au/MgxAlO catalysts from Group VIII metals due to the effects of temperature, pressure and steric structures of UALs were discussed. (C) 2009 Elsevier B.V. All rights reserved.
    Relation: APPLIED CATALYSIS A-GENERAL
    Appears in Collections:[化學工程與材料工程研究所] 期刊論文

    Files in This Item:

    File Description SizeFormat
    index.html0KbHTML391View/Open


    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback  - 隱私權政策聲明