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標題: | 燃煤火力發電廠燃燒後混搭薄膜碳捕捉程序 Hybrid Membrane Process for Post-combustion CO2 Capture from Coal-fired Power Plant |
作者: | Li-Xuan Ren 任立軒 |
指導教授: | 陳誠亮(Cheng-Liang Chen) |
關鍵字: | 薄膜分離程序,二氧化碳捕捉,燃煤發電廠,煙道氣,氮選擇性薄膜, Membrane separation process,CO2 capture,Coal-fired power plant,Flue gas,N2-selective membrane, |
出版年 : | 2018 |
學位: | 碩士 |
摘要: | 燃燒後碳捕捉是減少燃煤電廠二氧化碳排放的一個有效方法。已經有若干針對不同碳捕捉技術的研究,其中最常見且成熟的二氧化碳捕捉技術為胺吸收法,然而此程序極為耗能且成本高昂。透過薄膜進行氣體分離的碳捕捉程序展現了低能耗且低成本的潛力,然而先前的研究多專注在具備二氧化碳選擇性的膜上,關於氮選擇性膜的文獻則相當稀少。
在本研究中,兩種性質的薄膜皆會應用於程序當中。Polaris® 薄膜將作為一典型的二氧化碳選擇性薄膜,而氮選擇性薄膜的性質將在一範圍內討論,其中涵括選擇性200以下及滲透率10 m3(STP)m-2h-1bar-1以下的薄膜。本研究利用模擬軟體Aspen Plus® 來進行燃燒後碳捕捉薄膜程序的設計、模擬及分析,並針對典型550百萬瓦火力發電廠設計了多級薄膜程序,其目標為捕捉至少90%排放的二氧化碳。 本研究提出了同時應用兩種薄膜的混搭薄膜程序,並且針對不同的薄膜價格因子來進行最適化及經濟分析,最終展示了最佳設計變量與薄膜性質之間的關係。此結果可為薄膜性質發展方向提供建議。 Post-combustion CO2 capture is a promising way to reduce CO2 emissions at the coal-fired power plants. Several studies have been conducted regarding a wide variety of capture techniques and the conventional amine-based process is the most common method used for CO2 separation, but this process is energy-intensive and costly. Gas separation membrane process shows potential as an energy-efficient, low-cost CO2 capture option. However, most of the previous researches focused on CO2-selective membrane, and there’s limited literature regarding the application of N2-selective membrane. In this study, CO2-selective and N2-¬selective membrane are both applied to the process. Polaris® membrane was served as a typical CO2-selective membrane; on the other hand, membrane properties of N2-selective membrane with permeance up to 10 m3(STP)m-2h-1bar-1 and selectivity up to 200 were considered. Membrane process for post-combustion CO2 capture has been designed, simulated and analyzed by using Aspen Plus® simulation software, and multi-stage membrane separation process has been designed for capturing at least 90% CO2 from a typical 550MW subcritical coal-fired power plant. Hybrid membrane process applying both CO2- and N2-selective membranes has been proposed. Optimization and economic analysis have been applied based on the different cost factors, which reveal the relationship between the optimal design variables and membrane properties. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/72544 |
DOI: | 10.6342/NTU201902323 |
全文授權: | 有償授權 |
顯示於系所單位: | 化學工程學系 |
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