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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Title:	變壓吸附法回收發電廠廢氣與合成氣中二氧化碳之模擬
Authors:	陳宥任;Chen,Yu-Ren
Contributors:	化學工程與材料工程學系
Keywords:	變壓吸附;二氧化碳;發電廠;合成氣;多塔程序;溫室效應
Date:	2015-12-04
Issue Date:	2016-01-05 17:30:22 (UTC+8)
Publisher:	國立中央大學
Abstract:	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。 ;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.
Appears in Collections:	[National Central University Department of Chemical & Materials Engineering] Electronic Thesis & Dissertation

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