利用變壓吸附法捕獲煙道氣與合成氣中二氧化碳之實驗

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题名:	利用變壓吸附法捕獲煙道氣與合成氣中二氧化碳之實驗
作者:	李念祖;Lee,Nien-tsu
贡献者:	化學工程與材料工程學系
关键词:	變壓吸附法;煙道氣;合成氣;捕獲二氧化碳
日期:	2015-11-04
上传时间:	2016-01-05 17:22:18 (UTC+8)
出版者:	國立中央大學
摘要:	本研究以變壓吸附法捕獲燃煤電廠排放煙道氣與經水煤氣轉化後之合成氣中的二氧化碳，進料氣體以15%二氧化碳與85%氮氣模擬除硫、除水後的燃煤電廠煙道氣組成，以及41.4%二氧化碳與58.6%氮氣模擬合成氣經過水煤氣轉化後的組成。本研究選擇多種廠牌之活性碳、5A沸石與13X沸石進行等溫吸附實驗，測量吸附劑對二氧化碳與氮氣的等溫平衡吸附曲線得到吸附量，透過比較吸附量與選擇率，最後選擇UOP 13X沸石作為吸附劑，並將其填入吸附塔內進行突破曲線與脫附曲線實驗。藉由改變不同的進料壓力與組成，觀察其對突破曲線與脫附曲線的影響，並作為後續變壓吸附程序探討的基礎。最後本研究以單塔四步驟變壓吸附程序進行二氧化碳捕獲實驗，藉由改變不同的操作變因探討二氧化碳濃度與回收率的變化，進而找出最佳操作條件，期望做為未來建立放大製程之設計基礎。 ;In this study, pressure swing adsorption process is used to capture CO2 from flue gas exhausted by coal-fired power plant and from syngas after water gas shift reaction. The compositions of dry flue gas after suffer removal and syngas are 15% CO2/85% N2 and 41.4% CO2/58.6% N2 respectively. Three commercial adsorbents were chosen to obtain adsorption isotherm of CO2 and N2 by isothermal equilibrium adsorption experiment. Comparing adsorption amount of CO2 and CO2/N2 selectivity, UOP zeolite 13X was chosen as optimal adsorbent and will be used in follow-up experiment. Breakthrough curve experiment and desorption curve experiment were carried out. Varying different inlet pressure and composition to evaluate its effect on breakthrough curve and desorption curve. These experimental results could be foundation of investigating pressure swing adsorption process. Single-bed four-step pressure swing adsorption process was applied to carry out CO2 capture experiment. Operating condition were varied to evaluate their effect on CO2 purity and recovery. Finally, optimal operating condition was found and we hoped these results can be helpful to scale-up process design in the future.
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