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Student Number 88223023
Author Ming-Zhu Ye(葉明珠)
Author's Email Address No Public.
Statistics This thesis had been viewed 1560 times. Download 1130 times.
Department Chemistry
Year 2000
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title 應用固態核磁共振方法鑑定Mordenite沸石脫鋁反應後的酸性
Date of Defense 2001-07-16
Page Count 79
Keyword
  • Dealumination
  • NMR
  • Probe molecules
  • Abstract Despite the widespread use of zeolites in many industrial processes, there still remain many unanswered questions as tot he nature of the Lewis and Bronsted acid sites, particularly in steamed samples. A full characterization of the structure and acidity of these acid sites is essential if an understanding of the effect of composition and structure on the catalytic properties of the material is to be obtained.
    The composition such as Si/Al ratio of zeolites can be modified through different methods to improve the activity and selectivity of these materials in heterogeneous catalysis. Dealumination of zeolites is one of the methods that is most widely used. Therefore, acid leaching and subsequent chemical agent (with (NH4)2SiF6) treatments have been employed to dealuminate H-mordenite for seeking the best catalytic activity.
    The purpose of this work is to characterize the dealuminated mordenite samples with multinuclear solid-state magic angle spinning (MAS) NMR, for example, 1H, 29Si, and 27Al NMR. Furthermore, the nature, type, and distribution of Bronsted and Lewis acid sites in dealuminated mordenite samples has been investigated by using trimethylphosphine (TMP) and trimethylphosphine oxide (TMPO) as 31P NMR probes.
    Table of Content 中文摘要 ----------------------------------------------------------------------------- Ⅰ
    中文摘要 ----------------------------------------------------------------------------- Ⅱ
    目錄 ----------------------------------------------------------------------------------- Ⅲ
    表目錄 -------------------------------------------------------------------------------- Ⅴ
    圖目錄 ------------------------------------------------------------------------------- Ⅵ
    第一章 緒論-------------------------------------------------------------------- 1
    1-1 前言------------------------------------------------------------------ 1
    1-2 沸石與分子篩------------------------------------------------------------- 3
    1-2.1 Mordenite沸石的結構-------------------------------------------------- 7
    1-3 脫鋁反應------------------------------------------------------------------ 9
    1-4 固態核磁共振儀---------------------------------------------------------- 10
    1-4.1 Zeeman作用力-------------------------------------------------- 11
    1-4.2 非均向化學位移----------------------------------------------- 12
    1-4.3 偶極-偶極交互作用力---------------------------------------- 13
    1-4.4 四極矩作用力--------------------------------------------------- 14
    1-5 去耦合作用----------------------------------------------------------- 16
    1-6 魔角旋轉----------------------------------------------------------- 16
    1-7 核磁共振儀應用於沸石上------------------------------------------ 18
    1-7.1 1H MAS NMR--------------------------------------------------- 18
    1-7.2 29Si MAS NMR------------------------------------------------- 19
    1-7.3 27Al MAS NMR------------------------------------------------- 21
    1-7.4 探測分子應用於核磁共振儀上---------------------------- 23
    參考文獻----------------------------------------------------------- 24
    第二章 實驗----------------------------------------------------------- 27
    2-1研究動機與目的------------------------------------------------ 27
    2-2實驗藥品--------------------------------------------------------- 29
    2-3 實驗步驟--------------------------------------------------------------------- 30
    2-4 實驗儀器設備及參數----------------------------------------------------- 32
    參考文獻----------------------------------------------------------- 36
    第三章 結果與討論---------------------------------------------------------- 37
    3-1 XRD結果-------------------------------------------------------- 37
    3-2 1H MAS NMR光譜-------------------------------------------------------- 38
    3-2.1 1H MAS NMR結果-------------------------------------------------- 38
    3-3 29Si MAS NMR光譜------------------------------------------------------- 44
    3-3.1 29Si MAS NMR結果----------------------------------------------- 44
    3-4 27Al MAS NMR光譜------------------------------------------------------ 54
    3-4.1 1H MAS NMR結果------------------------------------------------ 54
    3-5 31P MAS NMR光譜-------------------------------------------------------- 57
    3-5.1 1H MAS NMR結果---------------------------------------------- 58
    參考文獻----------------------------------------------------------------------------- 66
    第四章 結論--------------------------------------------------------------------------- 68
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    Advisor
  • Hsien-Ming Kao(高憲明)
  • Files
  • 88223023.pdf
  • approve immediately
    Date of Submission 2001-07-16

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