利用變壓吸附程序分離甲醇裂解產氣中氫氣及一氧化碳之模擬

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姓名

詹家豪(Chia-hao Chan) 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

利用變壓吸附程序分離甲醇裂解產氣中氫氣及一氧化碳之模擬

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摘要(中)

本研究以變壓吸附程序處理甲醇裂解後所產生之模擬氣體(一氧化碳33%、氫氣66%及甲烷1%)，目的在於將一氧化碳以及氫氣回收並濃縮，使之儲存並利用，氫氣可作為能源之利用，一氧化碳可作為合成化學之原料。
變壓吸附法為一分離氣體混合物之連續性循環程序，利用氣體混合物中各成分對吸附劑之吸附能力的不同而產生的吸附選擇性來篩選氣體，並利用高壓吸附、低壓脫附以得到高濃度的產物。
本研究探討的吸附劑為北大先鋒公司所產之PU1吸附劑。研究一開始先以文獻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。再將已建立好的模擬程式分別與文獻中一氧化碳純化工廠數據以及氫氣純化實驗數據進行驗證，以驗證程式及吸附劑的可靠度。
最後分別以四塔二十四步驟變壓吸附程序處理甲醇裂解氣為進料進行模擬，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、儲氣槽大小、以及各步驟時間，尋求最適化的操作條件。

摘要(英)

This research studies the separation and concentration of carbon monoxide and hydrogen from the methanol decomposition product gas by pressure swing adsorption (PSA) process, so that the high concentration carbon monoxide and hydrogen can be producted .Hydrogen can be used as energy source and carbon monoxide can be used for raw chemical subtances.
Pressure swing adsorption is a cyclic process to separate gas mixtures based on the difference of adsorption capacity of each component on adsorbent. This technology consists of gas adsorption at high pressure and desorption at low pressure to produce high-purity product.
Zeolite PU1 adsorbent is used in this study. First, the experimental adsorption isotherm data from literatures were regressed to obtain the parameters of extend Langmuir isotherm equation. Then we verified the simulation program and adsorption parameters by comparison with the plant data of concentrating carbon monoxide and the experimental data of concentrating hydrogen from literatures. The agreement is quite good.
Finally, a four-bed twenty-four-step PSA process with methanol decomposition product gas (33% CO , 66 %H2, 1%CH4) as feed was studied to find the optimal operating conditions. The optimal operating conditions can be obtained by assessing different operating variables such as bed length, feed flow rate, feed pressure, vacuum pressure, storage tank volume, and the time of each step.

關鍵字(中)

★ PU1 吸附劑
★ 一氧化碳純化
★ 氫氣純化
★ 變壓吸附

關鍵字(英)

論文目次

摘要 ii
ABSTRACT iii
目錄 v
圖目錄 viii
表目錄 xiii
第一章、緒論 1
第二章、簡介及文獻回顧 5
2-1 變壓吸附之簡介 5
2-1-1 變壓吸附基本原理 5
2-1-2 吸附劑及其選擇性 6
2-1-3 變壓吸附基本操作步驟 7
2-2 文獻回顧 9
2-2-1 PSA程序之發展及改進 9
2-2-2 理論之回顧 12
2-3 研究背景與目的 13
第三章、理論 17
3-1 基本假設 18
3-2 統制方程式 19
3-3 吸附平衡關係式 28
3-3-1等溫吸附平衡關係式 28
3-3-2吸附熱關係式 31
3-4參數推導 32
3-4-1軸向分散係數 32
3-4-2熱傳係數 34
3-5求解的方法 36
3-5-1閥公式 36
3-5-2求解步驟 37
第四章、程式驗證 39
4-1 PU1吸附劑CO純化程序之模擬驗證 39
4-1-1 PU1吸附劑CO純化程序之製程描述 39
4-1-2 PU1吸附劑CO純化程序之模擬結果 45
4-2 雙塔六步驟氫氣純化程序之模擬驗證 48
4-1-1 雙塔六步驟氫氣純化程序之製程描述 48
4-2-2 雙塔六步驟氫氣純化程序之模擬結果 50
第五章、製程描述 54
5-1 四塔變壓吸附製程描述 54
5-2 氣體性質與吸附劑參數 59
第六章、數據分析與結果討論 60
6-1進料壓力對四塔二十四步驟PSA製程之影響 63
6-2進料流率對四塔二十四步驟PSA製程之影響 68
6-3儲氣槽體積對四塔二十四步驟PSA製程之影響 73
6-4塔長對四塔二十四步驟PSA製程之影響 78
6-5順向減壓時間對四塔二十四步驟PSA製程之影響 83
6-6逆向減壓壓力對四塔二十四步驟PSA製程之影響 90
6-7 Step 1/7/13/19時間對四塔二十四步驟PSA製程之影響 95
6-8 Step 6/12/18/24時間對四塔二十四步驟PSA製程之影響 101
6-9 最適化結果討論 106
第七章、結論 108
符號說明 110
參考文獻 114
附錄A、流速之估算方法 117
附錄B、各數據點詳細資料 121
附錄C、能耗計算 129

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指導教授

周正堂(Cheng-tung Chou)

審核日期

2015-12-7

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