- 學位論文
自煙道氣生產高純度二氧化碳之製程最佳化設計
Optimal design of high-purity carbon dioxide production from flue gas
摘要
化石燃料發電仍是當前能源供應最主要的方式，面對溫室氣體的管制，會有大量燃燒後捕獲的二氧化碳，其利用方式之一是直接作為高純度的二氧化碳應用。 本論文針對燃煤電廠煙道氣設計了產製3N與5N純度二氧化碳產物之製程。二氧化碳的捕獲是利用單乙醇胺水溶液的化學吸收法，再經過壓縮、開環冷凍脫水、吸附脫水與蒸餾純化之操作，生產47.5萬公噸/年3N純度與4.58萬公噸/年5N純度的液態二氧化碳。 除了完成基本個案設計，本論文以製程之淨現值(NPV)為目標函數，探討化學吸收段、壓縮段與脫水純化段之設計條件最佳化。最佳化分析決定出之最佳操作條件是氣提塔操作在2.5 bar、壓縮段出口壓力為40 bar，開環冷凍脫水系統之減壓程度為2 bar、5N的蒸餾純化塔使用23個理論板且側提取與進料位置分別為第8板及17板。最佳設計3N與5N製程之IRR分別為76%與40%。
並列摘要
As fossil fuel power generation continuously be the major of energy supply, significant amount of carbon dioxide will be generated. One way of utilization is to produce high-purity carbon dioxide. This thesis presents the process design for producing 3N (99.9 mol%) and 5N (99.999 mol%) from the flue gas of a coal-fired power plant. The carbon capture employs the chemical absorption technology by the aqueous solution of monoethanolamine. The captured carbon dioxide is then compressed, followed by dehydration using an open-cycle refrigeration system and an adsorption system as well as a distillation for 5N product purification. Optimal design analysis determines the stripping pressure, compression pressure before dehydration, pressure reduction of open-cycle refrigeration system as well as the theoretical plate, feed location and side-draw location of the distillation column. The IRR of the optimal design process for 3N and 5N production is 76% and 40%, respectively.
參考文獻
延伸閱讀
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