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Student Number 953204012
Author Chiang-Kuo Kai(江國凱)
Author's Email Address No Public.
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Department Chemical and Materials Engineering
Year 2007
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title Au/CeO2 supported on ceramic fiber paper by boehmite for complete benzene and toluene oxidation
Date of Defense 2008-06-24
Page Count 70
Keyword
  • Au
  • benzene
  • toluene
  • Abstract The main purpose of this study is to load Au/CeO2 and Au/V2O5/CeO2 on ceramic fiber paper in order to proceed complete oxidation of benzene and toluene. In our previous study we use CeO2 precursor solution to load the catalysts on ceramic fiber paper, the activities for complete oxidation of benzene and toluene decrease a lot. In this study we use boehmite precursor solution to load catalysts on ceramic fiber paper. Two catalysts are investigated: One is Au/CeO2 prepared by deposition precipitation (DP) method, the other is vanadium oxide promoted Au/CeO2 (Au/V2O5/CeO2) prepared by impregnation of vanadium oxide on CeO2 and then deposition of Au by DP method. The catalysts are characterized by XRD, TEM, BET, ICP and XPS.
    Complete oxidation of benzene over 1wt.%Au/CeO2 powder catalysts occur at 210℃. However, when the same catalyst is loaded on ceramic fiber paper, the temperature for complete oxidation is 230℃. Compared to benzene, toluene can be completely oxidized at 230℃ by Au/CeO2 powder catalyst and the temperature for complete oxidation is 250℃ when loaded on ceramic fiber paper. Besides, vanadium oxide promotes Au/CeO2 catalyst. Benzene is completely oxidized at 170℃ over 2wt.% of vanadium oxide promoted Au/CeO2. When this catalyst is loaded on ceramic fiber paper, the temperature for complete oxidation is 210℃. Toluene is completely oxidized over 4wt.% of vanadium oxide promoted Au/CeO2 powder catalyst at 210℃. If the catalyst is loaded on ceramic fiber paper, complete oxidation of toluene occurs at 230℃. The activities of boehmite loaded catalysts are higher than those catalysts loaded by CeO2 precursor solution and the mechanical strength of ceramic fiber paper after loading catalysts is stronger. Durability test results show that the catalyst Au/V2O5/CeO2 maintains the activity and stability for benzene and toluene oxidation over 200 hours.
    Table of Content 摘要............................................................................................................I
    英文摘要...................................................................................................II
    目錄......................................................................................................... IV
    圖目錄......................................................................................................VI
    表目錄..................................................................................................... IX
    第一章序論..............................................................................................1
    第二章文獻回顧..................................................................................…3
    2.1金觸媒的催化反應…..........................................................................4
    2.1.1 一氧化碳氧化反應..........................................................................4
    2.1.2 碳氫化合物的氧化..........................................................................5
    2.1.3 水氣轉移反應..................................................................................6
    2.2 苯與甲苯完全氧化反應.....................................................................7
    2.2.1 苯的完全氧化反應..........................................................................7
    2.2.2 甲苯的完全氧化反應....................................................................10
    2.3 觸媒製備方式的影響.......................................................................13
    第三章 實驗............................................................................................17
    3.1 實驗藥品...........................................................................................17
    3.2實驗儀器.............................................................................................18
    3.3實驗方法.............................................................................................19
    3.3.1觸媒擔體V2O5/CeO2製備(初濕含浸法).......................................19
    3.3.2金觸媒製備(沉積沉澱法)...............................................................20
    3.3.3 Boehmite膠之製備.........................................................................21
    3.3.4 CeO2前驅物母液之製備................................................................21
    3.3.5合成Au/CeO2於陶瓷纖維紙上.....................................................22
    3.3.6 檢量線的量測................................................................................23
    3.3.7 反應活性測試................................................................................25
    3.4鑑定方法............................................................................................27
    第四章 結果與討論................................................................................31
    4.1觸媒的鑑定-X光繞射光譜...............................................................32
    4.2 觸媒TEM影像.................................................................................36
    4.3 觸媒表面積及元素分析...................................................................41
    4.4 觸媒表面化學分析...........................................................................43
    4.5觸媒反應結果....................................................................................51
    4.5.1 添加釩氧化物對觸媒活性的影響................................................51
    4.5.2 觸媒負載於陶瓷纖維紙上活性之影響........................................52
    4.5.3 比較不同附著觸媒於纖維紙上之方式對甲苯完全氧化反應之影響..............................................................................................................54
    4.5.4 觸媒耐久性測試............................................................................56
    4.5.5 添加釩氧化物對觸媒活性的影響................................................58
    4.5.6 觸媒負載於陶瓷纖維紙上活性之影響........................................59
    4.5.7 比較不同附著觸媒於纖維紙上之方式對苯完全氧化反應之影響..............................................................................................................61
    4.5.8 觸媒耐久性測試............................................................................63
    第五章 結論............................................................................................65
    參考文獻…..............................................................................................67
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    Advisor
  • Sze-Ming Yang(楊思明)
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    Date of Submission 2008-07-11

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