博碩士論文 103324602 詳細資訊



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姓名 娜瑪妲(Narmatha Koothan)  查詢紙本館藏   畢業系所 化學工程與材料工程學系
論文名稱
(Preparation and characterization of processed sulfated zirconia catalysts)
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摘要(中) 中文摘要
使用基於N2 吸附 - 解吸等溫線的特徵技術，XRD，TGA，FTIR，BET 和孔徑分析來分析硫酸化氧化鋯。在這項研究中，硫酸化氧化鋯催化劑由純氧化鋯製備，有兩種方法。一種是煅燒前的硫化（SBC），另一種是煅燒後的硫化（SAC）。以我們實驗室的水熱法製備純氧化鋯作為起始原料。在這兩種情況下，硫化劑為硫酸（H2SO4），煅燒溫度為500℃。然而，測試了10℃/分鐘和5℃/分鐘之間的加熱速率的變化。從兩種不同方法得到的硫酸化氧化鋯的表面積為130-160m2 / g，介孔結構。通過XRD 和TGA 分析，證明通過煅燒500℃可以實現四方硫酸化氧化鋯，並通過FTIR 證實四方相的穩定性達到700℃。通過NaOH 滴定，正丁胺滴定以及氨-TPD 研究測量催化劑的酸度。發現製備的硫酸化氧化鋯具有對應於三種不同類型解吸峰的弱至高酸性位點。
摘要(英) The characteristic techniques, XRD, TGA, FTIR, BET and pore size analysis based on N2 adsorption-desorption isotherm were used to analyze the sulfated zirconia. In this study, sulfated zirconia catalyst was prepared from pure zirconia in two methods. One is Sulfurization before calcination (SBC), and the other one is sulfurization after calcination (SAC). The pure zirconia which we took as a starting material was prepared by the hydrothermal method in our laboratory. In both cases, the sulfurization agent was sulfuric acid (H2SO4), and the calcination temperature was 500oC. However, the variation of the heating rate between 10oC/min and 5oC/min were tested. The obtained sulfated zirconia from the two different methods has the surface area ranging from 130-160 m2/g with mesoporous structure. From the XRD and TGA analysis, it was proven that the tetragonal sulfated zirconia could be achieved by calcining for 500℃ and the stability of the tetragonal phase up to 700℃ was proven by FTIR. The acidity of the catalyst was measured by NaOH titration, n-butylamine titration, as well as by the ammonia-TPD study. It was found out that the prepared sulfated zirconia have weak to high acid sites corresponding to three different types of desorption peaks.
關鍵字(中) ★ sulfated zirconia 關鍵字(英)
論文目次 1 Introduction 1
1-1 Zirconia 1
1-2 Sulfated zirconia 4
1-3 Literature review 7
1-4 Objective 11
2 Synthesis of Zirconia nanocrystal and the preparation of sulfated zirconia therefrom 12
2-1 Materials 12
2-2 Experimental Section 12
2-3 Methods of characterization 19
3 Results and discussions 24
3-1 XRD 24
3-2 TGA 28
3-3 FTIR 30
3-4 Surface area measurement (BET) 33
3-5 Titration methods 35
3-6 NH3-TPD study 37
4 Conclusions 43
5 References 44
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指導教授 蔣孝澈(Anthony.S.T.Chiang) 審核日期 2017-8-22
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