臺灣博碩士論文加值系統

溫室氣體二氧化碳造成全球氣候變遷已愈演愈烈，CO2減量已成為刻不容緩的議題。因此尋求高效能封存或礦化二氧化碳的技術，將是CO2減量對策中的重要部分。其中，利用多孔性材料吸附二氧化碳以便回收再利用，是有效減量二氧化碳的方法之一。
故本研究希望：『利用多孔性氧化鋁、多孔性氧化鋁表面披覆CaO及胺根修飾加以吸附二氧化碳』。三種不同樣品的結晶相、表面形貌、比表面積分別以X光繞射分析儀、掃描式電子顯微鏡、比表面積分析儀加以量測。運用熱重-熱差分析儀（TG-DTA）從事二氧化碳吸/脫附實驗；並嘗試找出吸附二氧化碳最有效的影響因子；最後嘗試找出二氧化碳被吸附之機制。
利用X光繞射分析儀、掃描式電子顯微鏡、能量散佈能譜儀，確認樣品為多孔性氧化鋁；比表面積分析儀測得其比表面積為315 m2/g；利用TG-DTA從事二氧化碳吸/脫附實驗：多孔性氧化鋁在25°C 吸附二氧化碳效果較好。多孔性氧化鋁表面批覆氧化鈣後其比表面積約23 m2/g，在高溫750°C 時對二氧化碳有良好的吸附效果，它對二氧化碳的吸附量比純多孔性氧化鋁顯著；且多孔性氧化鋁表面批覆氧化鈣的比例越高，效果越好。而胺根改質後的多孔性氧化鋁，在低溫25°C 時吸附效果較好，且利用MEA 與EDA改質的多孔性氧化鋁效果優於3-CPAHCL改質的多孔性氧化鋁。
多次二氧化碳吸/脫附循環當中，多孔性氧化鋁在經多次循環後，吸附效果並未減弱；多孔性氧化鋁表面批覆氧化鈣的複合物，則隨著時間增加吸附效率降低，表面披覆的CaO比例越高，越能有效減緩吸附效率的衰減。而胺根改質後的多孔性氧化鋁，在多次循環後，吸附效果也跟者減弱，以3-CPAHCL改質過後的再生性較好。

It is well known that carbon dioxide (CO2) has become an important global issue due to the continuous rise in CO2 emissions to the atmosphere and it induces the global climate change. Therefore, it is necessary to reduce CO2 concentration by storage or mineralization techniques from the current level. The adsorption of carbon dioxides onto porous materials for recycling is one of the effective reduction of carbon dioxides.
In this study, we use porous alumina, CaO-coating and amine-modification porous aluminas to capture CO2. The crystal structure, morphology, and specific surface area of porous alumina, CaO-coating and amine-modification porous aluminas are characterized by XRD, SEM, and BET measurements, respectively. The thermo-gravimetric and differential temperature analyzer (TG-DTA) is performed to investigate the CO2 adsorption/desorption onto these samples. The CO2 adsorption efficiency and mechanism on the porous alumina samples are also discussed.
The porous alumina is examined as κ-Al2O3 phase by XRD, SEM, and EDS results. Its specific surface area is 315 m2/g. The κ-Al2O3 has the maximum CO2 adsorption efficiency at temperatures of 25°C, which is proved from TG-DTA data. The CaO/κ-Al2O3 sorbent has the maximum adsorption efficiency at 750°C with a surface area of 23 m2/g. The result indicates that CaO/κ-Al2O3 has a better CO2 adsorption efficiency than that of κ-Al2O3, and it increases with an increase of CaO ratio. The amine-modification of κ-Al2O3 has a good CO2 adsorption capacity at 25°C, and MEA-EDA modification is better than that of 3-CPAHCL sample.
The CO2 adsorption performance of κ-Al2O3 has not declined after multiple adsorption/desorption cycles, however, the CO2 adsorption capacity of CaO/κ-Al2O3 has reduced. The higher ratio of CaO-coating slows down the attenuation of CO2 adsorption efficiency. After several CO2 adsorption/desorption cycles, the κ-Al2O3 with amine-modification has a worse CO2 adsorption efficiency, and that of 3-CPAHCL modification has better regeneration than that of MEA-EDA modified sample.

摘要 I
Abstract III
誌謝 V
目錄 VII
表目錄 XI
圖目錄 XIII
第一章 緒論 1
第二章 研究背景 5
2-1二氧化碳減量技術 5
2-1-1 封存 5
2-1-2 捕集 8
2-1-3 回收再利用 10
2-2吸附劑之選擇 10
2-2-1 多孔性氧化鋁 11
2-2-2 氧化鈣 13
2-3氧化鈣改質之研究 15
2-4 胺根改質之研究 17
2-5吸附理論 18
2-6等溫吸附曲線 19
第三章 實驗方法 25
3-1 實驗藥品與設備 25
3-1-1實驗藥品 25
3-1-2實驗設備 26
3-2 實驗流程 26
3-3 樣品製備與改質方法 28
3-3-1 多孔性氧化鋁之製備 28
3-3-2 CaO改質方法 28
3-3-3 3-CPAHCL胺根改質方法 30
3-3-4 MEA/EDA胺根改質方法 32
3-4 分析儀器原理 34
3-4-1 X光繞射儀 34
3-4-2 掃描式電子顯微鏡 34
3-4-3 能量散佈能譜儀 35
3-4-4 比表面積及孔徑分析儀 35
3-4-5 傅立葉轉換紅外線光譜儀 37
3-4-6 熱重-熱差分析儀 38
3-5 二氧化碳吸附/脫附實驗 40
3-5-1 多孔性氧化鋁之二氧化碳吸/脫附實驗 40
3-5-2 CaO/κ-Al2O3之二氧化碳吸/脫附實驗 43
3-5-3 胺根/κ-Al2O3之二氧化碳吸/脫附實驗 44
第四章 結果與討論 45
4-1 比表面積分析結果 45
4-2　X光繞射分析-反應前礦物相鑑定 52
4-2-1 κ-Al2O3之X光粉末繞射 52
4-2-2 CaO/κ-Al2O3之X光粉末繞射 53
4-2-3 CaO(100)之X光粉末繞射 54
4-3 多孔性氧化鋁特性分析 55
4-3-1 能量散佈能譜分析 55
4-3-2 掃描式電子顯微鏡分析 55
4-4 TG-DTA熱穩定分析 58
4-4-1 κ-Al2O3熱穩定分析 58
4-4-2 CaO(83)/κ-Al2O3熱穩定分析 60
4-4-3 CaO(93)/κ-Al2O3熱穩定分析 61
4-4-4 CaO(100)熱穩定分析 63
4-4-5 3CPA/κ-Al2O3熱穩定分析 64
4-4-6 M-E/κ-Al2O3熱穩定分析 65
4-5 二氧化碳吸附實驗 66
4-5-1 κ-Al2O3二氧化碳吸附實驗 66
4-5-2 CaO-83/κ-Al2O3二氧化碳吸附實驗 71
4-5-3 CaO-93/κ-Al2O3二氧化碳吸附實驗 73
4-5-4 CaO-100二氧化碳吸附實驗 76
4-5-5 3CPA/κ-Al2O3二氧化碳吸附之結果 78
4-5-6 M-E/κ-Al2O3二氧化碳吸附之結果 80
4-6 二氧化碳多循環吸脫附實驗 82
4-6-1 κ-Al2O3二氧化碳多循環吸脫附實驗 82
4-6-2 CaO/κ-Al2O3二氧化碳吸附多循環 84
4-6-3 胺根/κ-Al2O3二氧化碳多循環吸脫附實驗 87
4-7 物理混合CaO與κ-Al2O3對二氧化碳吸附實驗 89
4-8 二氧化碳吸附後XRD分析 91
4-8-1 CaO(83)/κ-Al2O3與二氧化碳反應後XRD 91
4-8-2 CaO(93)/κ-Al2O3與二氧化碳反應後XRD 93
4-8-3 CaO(100)與二氧化碳反應後XRD 95
4-9二氧化碳吸附後SEM分析 97
4-9-1 κ-Al2O3與二氧化碳反應前後SEM分析 97
4-9-2 CaO(100)與二氧化碳反應前後SEM分析 98
4-9-3 CaO(93)/κ-Al2O3與二氧化碳反應前後SEM分析 99
4-9-4 CaO(83)/κ-Al2O3與二氧化碳反應前後SEM分析 100
4-10 二氧化碳吸附後BET分析 101
4-11 FT-IR 檢測官能基 105
4-12 與前人文獻比較 109
4-12-1 κ-Al2O3吸附效果與前人文獻比較 109
4-12-2 CaO/κ-Al2O3吸附效果與前人文獻比較 109
4-12-3 胺根/κ-Al2O3吸附效果與前人文獻比較 110
第五章 結論 113
第六章 參考文獻 115

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