臺灣博碩士論文加值系統

本實驗主要是建立光觸媒分解揮發性有機化合物的分析平台。分析平台使用原位偵測傅立葉穿透式紅外線光譜(in-situ Transmission FTIR)光觸媒反應器，以探討光觸媒分解揮發性有機化合物之反應機制。同時，亦使用氣相層析儀進行定量分析。此分析平台的潛在優點是在探討光觸媒反應時，同時提供定性的反應機構資訊以及定量分析的動力學數據，且在同一套反應系統中經由簡易的操作即可以搭配多種不同的反應條件，包括:批式或連續式、多種不同種類之氣體濃度分析器、多種不同波段之光源、多種種類之光觸媒、多種不同種類之揮發性有機化合物、以及不同之進料方式，這樣即可省去在不同反應條件下所需重新設計反應器的困擾。經由實驗結果分析所示，此分析平台確實可以應用到光觸媒分解揮發性有機化合物的檢測與研究上，並可以落實應用在多種不同反應條件上，而從原位偵測傅立葉穿透式紅外線光譜中可知甲醇在TiO2觸媒上進行光分解時會分解成甲醛、甲酸和甲基氧自由基等中間產物，最後甲酸進而再氧化分解成二氧化碳。而當在氧氣不足的情況下，甲醇分解後並不能完全氧化成二氧化碳，而是部分的一氧化碳。

The objective of this study is to establish an analysis system for photocatalyst decomposing of volatile organic compounds (VOCs).This analysis system uses in-situ Transmission FTIR photocatalytic reactor to investigate the reaction mechanism of photocatalyst decomposing of VOCs and uses gas chromatograph to determine quantitative analysis, providing the reaction mechanism and the kinetic data simultaneously.This reaction system can untilize various reaction conditions by simple operation. These conditions include batch mode reaction, continue mode reaction, gaseous detectors, light source, photocatalyst, VOCs, and VOCs injection model. This system can reduce time of redesign reactor at different condition. This experiment result show this system indeed can apply to many conditions. FTIR result shows TiO2 decompose CH3OH to intermediates, such as H2CO, CH3O•, HCOOH. Finally HCOOH decompose into CO2 and H2O.Under a O2 lean condition, CH3OH is partially oxidized to CO and CO2.

目錄
摘要 I
Abstract II
第一章 導論 1
第二章 原理與文獻回顧 3
2-1 觸媒基本觀念 3
2-2 表面科學 3
2-2-1 表面的定義 3
2-2-2 表面催化 4
2-2-3 表面吸附 5
2-3 文獻回顧 6
2-3-1 TiO2光催化的起源 6
2-3-2 二氧化鈦簡介 6
2-3-3 二氧化鈦的物理性質 7
2-3-4 二氧化鈦的光化學性質 8
2-3-5 光觸媒表面吸附現象 15
2-3-6 二氧化鈦的光催化反應 19
2-3-7 光催化反應器 22
2-3-8 相關文獻與本研究之比較 24
第三章 實驗目的與方法 26
3-1 實驗目的 26
3-2 實驗方法 27
3-2-1 實驗儀器 27
3-2-2 實驗藥品 29
3-2-3 實驗裝置 30
3-2-3-1 光催化反應系統主體單元 30
3-2-3-2 光觸媒主體反應單元 30
3-2-3-3 原位傅立葉穿透紅外線光譜光觸媒反應單元 31
3-2-3-4 光源供應單元 31
3-2-3-5 批式系統與連續式系統切換單元 32
3-2-3-6 氣態進料單元 32
3-2-3-7 液態注射進料單元 32
3-2-3-8 氣體濃度檢測單元 33
3-2-4 實驗步驟 34
3-2-4-1 光觸媒固定化製備 34
3-2-4-2 空白實驗 35
3-2-4-3 背景實驗 35
3-2-4-4 連續式紫外線/光觸媒反應程序 36
3-2-4-5 批式紫外線/光觸媒反應程序 36
3-2-4-6 原位傅立葉穿透紅外線光譜光觸媒反應程序 37
第四章 結果與討論 38
4-1 原位傅立葉穿透紅外線光譜結果分析 38
4-2 氣相層析儀(Gas Chromatograph)結果分析 46
4-2-1 連續式系統反應活性分析 46
4-2-2 批式反應測試平台活性分析 48
4-2-2-1 不同種類光觸媒 (UV-100/P-25) 49
4-2-2-2 不同反應體積 52
4-2-2-3 不同VOC種類 55
4-2-2-4 不同光源 59
第五章 結論與展望 63
附錄 65
附錄A 商用型光觸媒 65
A-1 Hombikat UV100 65
A-2 Degussa P 25 66
附錄B 檢量線 68
附錄C 氣相層析儀軟硬體參數設定 71
附錄D 常見氣體熱傳導度 73
參考文獻 74

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