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題 名 | 液化天然氣冷能應用於捕捉及液化二氧化碳之研究=Liquefaction of Carbon Dioxide by Cold Energy from LNG Receiving Terminal |
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作 者 | 張文騰; 翁堉翔; 周金言; 黃冬梨; | 書刊名 | 石油季刊 |
卷 期 | 53:4 2017.12[民106.12] |
頁 次 | 頁129-141 |
分類號 | 457.8 |
關鍵詞 | 液化天然氣; 冷能; 二氧化碳; 捕捉; 液化; Liquefied natural gas; Cold energy; Carbon dioxide; Capture; Liquefaction; |
語 文 | 中文(Chinese) |
中文摘要 | 中油公司每年超過1,200萬噸的液化天然氣,作為國內發電用之低碳燃料,若能利用其冷能捕捉及液化鄰近天然氣發電廠煙道氣中的二氧化碳,純化後的二氧化碳,不但可作為各種工業之原料,亦可獲得碳權,作為未來工廠擴建使用。本研究以化工模擬軟體Aspen Plus 建立穩態模型,模擬台電端天然氣機組之尾氣,經不同方式預純化後,再送至LNG 廠進行精製及液化。三種預純化二氧化碳案例為 (1)無處理 (2)薄膜純化和(3)鹼液純化。依據求得的整體製程之質量與能量平衡資料,使用Aspen Capital Cost Estimator 計算每個操作單元之價格以估算總設備費用,進而計算總投資成本。再加上年操作費用,即可求得二氧化碳(99.5%)之生產成本。由結果得知,其中以鹼液吸收提純二氧化碳之成本最低,生產二氧化碳之成本為3.28 NT/kg,最具經濟性。本研究之成果可作為未來大規模二氧化碳捕捉及液化之參考。 |
英文摘要 | CPC imports more than 1.2 million tons of liquefied natural gas as low-carbon fuel for power generation each year. In this study, we proposed to use the cold energy from liquefied natural gas to capture and liquefy carbon dioxide from adjacent power plant exhaust gas. The high purity liquid carbon dioxide can be used as industrial raw materials. In addition, the obtained carbon credits can be used in the future. In this study, steady-state models are established with chemical simulation software, Aspen Plus, to simulate CO_2 capture and purification process. After pre-purified process, the gas stream is transported to the LNG plant for purification and liquefaction to obtain 99.5% liquid CO_2. The three pre-purified processes are (1) base case, (2) membrane and (3) amine. Based on the results of overall mass and energy balance data, each operating unit capital cost can be calculated using Aspen Capital Cost Estimator. The production cost of liquid carbon dioxide can be estimated from the total investment cost and annual operating costs. Based on the economic model developed in this study, CO2 production cost for base case, membrane separation and amine absorption are 3.77 NT/kg, 4.78 NT/kg and 3.28 NT/kg. The results of this study can be used as the references for large-scale CO_2 capture and liquefaction in the future. |
本系統中英文摘要資訊取自各篇刊載內容。