English  |  正體中文  |  简体中文  |  Items with full text/Total items : 17776/20117 (88%)
Visitors : 11059289      Online Users : 616
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.cnu.edu.tw/handle/310902800/21284

    標題: 觸媒濕式過氧化反應處理含酚廢水之研究
    Study on catalytic wet peroxide oxidation of phenol by Metal-Supported Catalyst
    作者: 陳煜斌
    貢獻者: 環境工程與科學系
    關鍵字: 擔體觸媒
    Supported catalyst
    Catalytic wet peroxide oxidation ( CWPO )
    Phenolic wastewater
    Regenerated catalyst
    日期: 2008
    上傳時間: 2009-05-14 11:41:03 (UTC+8)
    摘要: 本研究利用γ型三氧化二鋁(γ-Al2O3)作為擔體,合成各種不問金屬觸媒,在添加過氧化氫之狀態下進行觸媒濕式過氧化反應(C atalytic Wet Peroxide Oxidation,CWPO),藉由分析酚轉化率與COD去除率,評估各種觸媒對於含酚廢水濕式過氧化反應之催化效能。本研究所台成之金屬觸媒包括Cu、Mn、Co、Cr 和Ni,添加量固定為5wt%。研究結果顯示以銅合成之觸媒作為觸發過氧化氫生成氫氧自由基(free radicals,OH.)之效果最佳,在反應條件為:酚濃度500mg / L、觸媒添加量1.0g/ L、過氧化氫添加量1200mg/L、起始pH = 3、反應溫度40℃時,5wt%Cu/γ- Al2O3觸媒反應三小時之酚轉化率及COD去除率分別約即80%及32 %;為了增加觸媒之催化活性與耐用性,本研究合成含浸量為15-5wt%之Ce-Cu/γ- Al2O3觸媒,在觸媒添加量1.5g/L,過氧化氫1200ppm,反應溫度40℃,起始pH=3,酚濃度500mg / L之反應情況下,對酚之去除效率在3小時內可達90%以上,化學需氧量的去除率亦可達38%。使用過後之Ce- Cu/γ- Al2O3觸媒經再生後,重複測試並與新鮮觸媒作比較,其催化效率雖然降低,但再生效能優於銅擔體觸媒,故鈰-銅擔體觸媒比銅觸媒有較優之活性與耐用性。
    Catalysts with various metals(Cu、Mn、Co、Cr and Ni) supported onγ-Al2O3 were used to implement the catalytic wet peroxide oxidation (CWPO) of phenolic wastewater. Via rates of phenol conversion and COD removal, performance of the catalysts was evaluated to screen for the optimal one. With fixed amount of metal ( 5wt % ), the Cu/γ-Al2O3 porformed best because it catalyzes H2O2 to create effective free radicals. At the conditions of 500mg/L phenol concentration, 1.0g/L catalyst loading, 1200mg / L H2O2, initial pH 3 and 40℃, the phenol conversion and COD removal after 3 hrs reaction were 80 % and32 %, respectively. On the other hand, the l5-5wt % Ce-Cu/γ-Al2O3 prepared in this study was found to be more active and durable than Cu /γ-Al2O3 catalyst tested. At the conditions of 1.5 g/L catalyst loading, 1200mg/L H2O2, initial pH 3 and 40℃, 500mg / L phenol could attain 90% phenol conversion and 38 % COD removal after 3hours CWPO reaction. Though the activity of regenerated catalysts, including Ce-Cu /γ-Al2O3 and Cu /γ-Al2O3 catalysts, was lower than that of fresh ones, it was found that regenerated Ce-Cu /γ-Al2O3 had higher performance than the regenerated Cu- /γ-Al2O3 catalyst tested.
    關聯: 嘉南學報(科技類)34:p.186-197
    Appears in Collections:[嘉南學報] 34 期 (2008)
    [環境工程與科學系(所)] 期刊論文

    Files in This Item:

    File Description SizeFormat
    v34_186_197.pdf4896KbAdobe PDF291View/Open

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

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback