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dc.contributor.authorChan, Min-Keen_US
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dc.description.abstractIn this dissertation, the purpose of this study is to prepare copper based catalyst supported on praseodymium oxide and to apply it on steam reforming of methanol. The catalysts were tested by packed-bed reactor between 200℃ to 400℃. The parameters of catalyst preparation include the different deposition methods, ratios of promoter to support, different solutions, types of stabilizer, concentration of precursor and different second supports. Operating conditions in steam reforming of methanol included molar ratio of H2O/CH3OH, molar ratio of O2/CH3OH, weight hourly space velocity, and stability of catalysts. The results revealed that the catalyst prepared by precipitation and chemical reduction method is better than that prepared by co-precipitation method for this system. Doping of 10% small amounts of metal oxide promoters (Ce, Sm, Y, Zr) to the Cu-Pr2O3 catalyst enhanced the dispersion , activity of the catalyst and improved about 5% yield at 280°C. The catalyst added CeO2 has the best hydrogen yield of 91%. Y2O3-doped catalyst has the smallest volume fraction of carbon monoxide , 0.09V%. With the addition content of Y2O3 more than 16%, promoters would be too much and hide copper to decrease the activity of catalyst. Different catalyst stabilizers also affect the structure of catalyst significantly in the process of preparation of catalyst. CTMAB surfactant adsorbed on the catalyst surface will make the copper not reduced and inhibit the activity of copper. While the polyethylene glycol (PEG) change the structure and enhance the active catalysts effectively. Adding the alumina in the catalyst can improve the catalytic efficiency. In the stability test, the activity of Cu(25)/Pr2O3(75) catalyst remain 60% in the reaction of 20 hours, and the Cu(25)Y2O3(10)/Pr2O3(65) catalyst maintained at 80%. While the hydrogen yield of the catalyst added alumina almost had no decline in the reaction of 100 hours.en_US
dc.description.tableofcontents中文摘要 I 英文摘要 II 誌謝 IV 圖目錄 VIII 表目錄 XII 符號說明 XIV 第一章 緒論 1 一、 前言 1 二、 研究目的與動機 2 (一)研究目的 2 (二)研究方法 2 第二章 文獻回顧與基本原理 5 一、 燃料電池 5 二、 氫氣儲存方式與來源 8 三、 奈米材料性質與製備 12 四、 觸媒製備 13 五、 蒸氣重組反應文獻回顧 20 第三章 實驗設備與方法 26 一、 實驗藥品 26 二、 實驗設備 28 三、 分析儀器 28 (一) X-ray繞射儀(X-ray Diffraction Spectrometer) 29 (二) BET表面積與孔洞分析儀(BET) 31 (三)場發射掃描式電子顯微鏡 (Field Emission Scanning Electron Microscope,FE-SEM) 33 (四) X光能量散佈儀(X-ray Energy Dispersive Spectrometer,EDS) 34 (五)穿透式電子顯微鏡(Transmitted Electron Microscope,TEM) 35 (六)熱重分析儀(Thermogravimetric Analysis,TGA)氣相層析儀 35 (七)氣相層析儀(Gas Chromatography) 36 四、 實驗方法 37 五、 觸媒於甲醇蒸汽重組反應之計算方法 40 六、 H2、CO檢量線 43 第四章 觸媒活性與特性分析 46 一、 前言 46 二、 觸媒條件探討 48 (一)不同製備與煅燒方式對Cu-Pr2O3觸媒影響 48 (二)不同促進劑對觸媒影響 60 (三)Cu-Y2O3/Pr2O3觸媒不同比例組成對其特性討論 71 (四)不同溶劑對觸媒型態討論 82 (五)不同保護劑對觸媒活性討論 90 (六)不同前驅物濃度對觸媒影響 102 (七)還原劑不同使用量 110 (八)不同第二載體對觸媒影響 112 三、 結論 122 第五章 甲醇蒸汽重組反應操作條件探討 124 一、 前言 124 二、 不同水醇莫耳比 125 三、 不同氧醇莫耳比 130 四、 不同重量空間流速 133 五、 觸媒活性與穩定測試 136 六、 結論 141 第六章 總結 142 未來展望 146 參考文獻 147zh_TW
dc.subjectsteam reforming of methanolen_US
dc.subjectcopper catalystsen_US
dc.subjectpraseodymium oxideen_US
dc.subjectchemical reduction methoden_US
dc.titleProduction of Hydrogen by Steam Reforming of Methanol over Copper-Based Catalysts Supportedon Praseodymium Oxideen_US
dc.typeThesis and Dissertationzh_TW
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