博碩士論文 102324051 詳細資訊




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姓名 陳宥任(Yu-Ren Chen)  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 變壓吸附法回收發電廠廢氣與合成氣中二氧化碳之模擬
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摘要(中) 本研究以變壓吸附程序處理發電廠所排放之煙道氣以及經由水煤轉化反應器生成合成氣中的二氧化碳,目的在於將二氧化碳回收並濃縮,使之封存以減少人為造成的溫室氣體排放。
其中煙道氣組成為15%CO2和85%氮氣,而合成氣組成為41.4%二氧化碳、1.3%一氧化碳和57.3%氫氣。
本研究使用的吸附劑為吸附劑13X沸石。研究一開始先以實驗數據中各氣體成份對吸附劑的平衡吸附量進行迴歸,以取得平衡吸附曲線的參數。之後經由理論計算出線性驅動力質傳係數,並與突破曲線實驗和脫附實驗做驗證。再將所建立好的模擬程式與單塔四步驟程序實驗分別以不同氣體進料進行驗證,以證明脫附時線性驅動力質傳係數同時也驗證程式的可靠度。
最後分別以雙塔六步驟變壓吸附程序處理合成氣以及放大三塔十二步驟處理煙道氣,並藉由探討不同的操作變因如吸附塔塔長、進料流率、進料壓力、逆向減壓壓力以及各步驟時間,尋求最適化的操作條件。
摘要(英) This research studies concentrating carbon oxide from the flue gas of an power plant and from syngas after water gas shift reaction by pressure swing adsorption (PSA) process, so that the concentrated carbon oxide can be captured and storaged to reduce greenhouse gas emission.
Commercialized Zeolite 13X is used in this study. In the beginning of this study, the experimental adsorption isotherm data were regressed to obtain the parameters of Langmuir-Freundlich isotherm equation. Then the k value of linear driving force (LDF) model were calculated by theory and verified by breakthrough curve and desorption experiment. Then we verified the simulation program by comparison with the data of a single-bed four-step process experiment. The agreement is quite good.
At the end of this study, both two-bed six-step PSA process for syngas (41.4% CO2,1.3%CO,57.3%H2) and three-bed twelve step PSA process for flue gas (15%CO2,85%N2) were studied to find the optimal operating conditions. The optimal operating conditions can be obtained by assessing different operating variables such as bed length, feed pressure, vacuum pressure, and the time of each step.
關鍵字(中) ★ 變壓吸附
★ 二氧化碳
★ 發電廠
★ 合成氣
★ 多塔程序
★ 溫室效應
關鍵字(英)
論文目次 摘要 I
ABSTRACT II
目錄圖目錄 VI
圖目錄 XI
表目錄 XXI
第一章、 緒論 1
第二章、 簡介及文獻回顧 8
2-1吸附之簡介 8
2-1-1 吸附基本原理 8
2-1-2 吸附劑及其選擇性 9
2-1-3 吸附劑操作原理 10
2-2 文獻回顧 12
2-2-1 PSA程序之發展與改進 12
2-2-2 理論之回顧 15
2-3研究背景與目的 18
第三章、 理論 24
3-1 基本假設 25
3-2 統制方程式 26
3-3 吸附平衡關係式 31
3-3-1 等溫吸附平衡關係式 31
3-3-2 吸附熱關係式 32
3-4 參數推導 33
3-4-1 軸向分散係數 33
3-4-2 熱傳係數 36
3-4-3 線性驅動力質傳係數 39
3-5 邊界條件與流速 42
3-5-1 邊界條件與節點流速 42
3-5-2 閥公式 43
3-6 求解步驟 44
第四章、 平衡吸附曲線與吸脫附曲線 47
4-1 吸附平衡(ADSORPTION EQUILIBRIUM) 48
4-1-1 氣體與吸附劑性質 48
4-1-2 等溫平衡吸附曲線(Isotherm) 51
4-2 吸附動力學(ADSORPTION KINETICS) 57
4-2-1 線性驅動力質傳係數 57
4-2-2 突破曲線模擬驗證 58
4-2-3 脫附實驗模擬驗證 66
第五章、 製程描述 71
5-1 單塔四步驟變壓吸附程序 72
5-2 雙塔六步驟變壓吸附程序 74
5-3 三塔十二步驟變壓吸附程序 76
第六章、 數據分析與結果討論 79
6-1 單塔四步驟變壓吸附法捕獲煙道氣中二氧化碳之驗證 79
6-1-1 高壓吸附時間對單塔四步驟PSA製程之影響 81
6-1-2 同向減壓步驟時間對單塔四步驟PSA製程之影響 85
6-2 煙道氣進料三塔十二步驟變壓吸附程序之模擬 89
6-2-1 塔長對三塔十二步驟PSA製程之影響 92
6-2-2 進料溫度對三塔十二步驟PSA製程之影響 96
6-2-3 進料壓力對三塔十二步驟PSA製程之影響 102
6-2-4 逆向減壓壓力對三塔十二步驟PSA製程之影響 106
6-2-5 高壓吸附時間對三塔十二步驟PSA製程之影響 110
6-2-6 同向減壓時間對三塔十二步驟PSA製程之影響 114
6-2-7 最適化結果討論之煙道氣進料三塔十二步驟 119
6-3 單塔四步驟變壓吸附法捕獲合成氣中二碳化碳之驗證 121
6-3-1 高壓吸附時間對單塔四步驟PSA製程之影響 122
6-4 合成氣進料雙塔六步驟變壓吸附程序之模擬 126
6-4-1 塔長對雙塔六步驟PSA製程之影響 128
6-4-2 進料流率對雙塔六步驟PSA製程之影響 133
6-4-3 進料溫度對雙塔六步驟PSA製程之影響 140
6-4-4 進料壓力對雙塔六步驟PSA製程之影響 147
6-4-5 逆向減壓壓力對雙塔六步驟PSA製程之影響 152
6-4-6 進料時間對雙塔六步驟PSA製程之影響 157
6-4-7 同向減壓時間對雙塔六步驟PSA製程之影響 162
6-4-8 最適化結果討論之合成氣進料雙塔六步驟 167
第七章、 結論 169
7-1 結論 169
7-1-1 管壁為不銹鋼之煙道氣進料三塔十二步驟變壓吸附程序最適化結果 170
7-1-2 管壁為碳鋼之煙道氣進料三塔十二步驟變壓吸附程序 172
7-1-3 合成氣進料雙塔六步驟變壓吸附程序最適化結果 175
7-2 能耗計算 177
符號說明 180
參考文獻 185
附錄A、流速之估算方法 191
附錄B、模擬結果數據 195
B-2煙道氣進料三塔十二步驟變壓吸附程序煙道氣變因結果 195
B-1合成氣進料雙塔六步驟變壓吸附程序變因數據結果 201
附錄C、最適操作條件之塔內壓力變化圖 208
C-1雙塔六步驟變壓吸附程序之合成氣 208
C-2三塔十二步驟變壓吸附程序之煙道氣 209
附錄D、最適操作條件之塔內氣相濃度變化圖 210
D-1雙塔六步驟變壓吸附程序之合成氣 210
D-三塔十二步驟變壓吸附程序之煙道氣 211
附錄E、最適操作條件之塔內固相濃度變化圖 212
E-1雙塔六步驟變壓吸附程序之合成氣 212
E-2三塔十二步驟變壓吸附程序之煙道氣 213
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指導教授 周正堂、楊閎舜 審核日期 2015-12-4
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