摘 要

隨著對能源需求的增加及高度工業化，燃燒大量化石燃料的結果，使得CO2排放量大增，造成全球暖化的現象，對氣候變遷影響頗鉅。如何有效率地自排放氣中回收CO2一直是各國致力追求的方向。
　　有別於傳統利用填充塔吸收CO2的方式，本研究探討一種新發展的技術－Higee（High Gravity）Technology。Higee技術即是在高速旋轉床（Rotating Packed Bed, RPB）中，吸收液與CO2採Counter-Current的方式，進行化學吸收。
本研究使用PZ（Piperazine）、MEA（Monoethanolamine）、AMP（2-Amino-2-Methyl-1-Propanol）、MDEA（Methyldiethanolamine）等吸收劑，在不同的氣體流量、液體流量、吸收液種類、及吸收液比例等操作條件下，探討對CO2吸收效果的影響。實驗結果顯示當氣體流量為10 L/min，液體流量為90 cc/min，旋轉床轉速為1300 rpm時，無論單一成份的吸收劑（0.7M PZ），或混合吸收液（0.5M PZ+0.5M MEA）均可使高濃度的CO2（10% CO2 Vol％）出口濃度降至1%以下。
在低濃度CO2（1000 ppm Vol％）部分，當氣體流量為18 L/min，液體流量為20 cc/min，旋轉床轉速為1300 rpm時，總濃度為0.3M的0.2MPZ+0.1M MEA，在120 min的操作下，出口CO2的濃度可維持在50 ppm以下。

參考文獻

[1]. Adisorn, A.; Paitoon, T. High-Efficiency Strctured Packing for CO2 Separation Using 2-Amino-2-Methyl-1-Propanol (AMP). Separation and Purification Technology 1997, 12, 67.

[2]. Adisorn, A.; Amornvadee, V.; Paitoon, T. Behavior of the Mass-Transfer Coefficient of Structured Packings CO2 Absorbers with Chemical Reactions. Ind. Eng. Chem. Res. 1999, 38, 2044.

[3]. Adisorn, A.; Paitoon, T. Mass Transfer Coefficients and Correlation for CO2 Absorption into 2-Amino-2-Methyl-1-Propanol (AMP) Using Structured Packing. Ind. Eng. Chem. Res. 1998, 37, 569.

[4]. Amit, C. CO2 Capture Processes-Opportunities for Improved Energy Efficiencies. Energy Convers. Mgmt. 1997, 38, S51.

[5]. Browning, J. G.; Weiland, H. R. Physical Solubility of Carbon Dioxide in Aqueous Alkanolamines via Nitrous Oxide Analogy. J. Chem. Eng. Data, 1994, 39, 817.

[6]. Danckwerts, V. P. Gas-Liquid Reactions. McGraw-Hill, 1970.

[7]. Hydrocarbon Processing Gas Process Handbook. McGraw-Hill, 1990, 69.

[8]. Li, M. H.; Xiao, J.; Li, C. W. Kinetics of Absorption of Carbon Dioxide into Aqueous Solutions of 2-Amino-2-Methyl-1-Propanol + Monoethanolamine. Chem. Eng. Sci. 2000, 55, 161.

[9]. Li, M. H.; Liao, C. H. Kinetics of Absorption of Carbon Dioxide into Aqueous Solutions of Monoethanolamine + N-Methyldiethanolamine. Chem. Eng. Sci. 2002, 57, 4569.

[10]. Liu, H. S.; Lin, C. C.; Wu, S. C.; Hsu, S. W. Characteristics of a Rotating Packed Bed. Ind. Eng. Chem. Res. 1996, 35, 3590.

[11]. Liu, H. S.; Chen, Y. S. Absorption of VOCs in a Rotating Packed Bed. Ind. Eng. Chem. Res. 2002, 41, 1583.

[12]. Munjal, S.; Dudukovic, M. P.; Ramachandran, P. A. Mass Transfer in Rotating Packed Beds: I. Development of Gas-Liquid and Liquid-Solid Mass-Transfer Coefficients. Chem. Eng. Sci. 1989a, 44, 2245.

[13]. Paitoon, T.; Meisen, A.; Lim, C. J. CO2 Absorption by NaOH, Monoethanolamine and 2-Amino-2-Methyl-1-Propanol Solutions in a Packed Column, Chem. Eng. Sci. 1992, 47, 381.

[14]. Ramshaw, C.; Mallinson, R. H. Mass Transfer Process. U.S. Patent 4, 383, 255, 1981.

[15]. Reid, C. R.; Prausnitz, M. J.; Poling, E. B. The Properties of Gases and Liquids. McGraw Hill, 4th Edition 1988.

[16]. Rochelle, T. G.; Bishnoi, S. Absorption of Carbon Dioxide in Aqueous Piperazine/Methyldiethanolamine. AIChE Journal, 2002, 48, 2788.

[17]. Rochelle, T.G.; Dang, H. CO2 Absorption Rate and Solubility in Monoethanolamine/Piperazine/Water. Separation and Purification Technology, 2003, 38, 337.

[18]. Rochelle, T. G.; Bishnoi, S. Absorption of Carbon Dioxide into Aqueous Piperazine: Reaction Kinetics, Mass Transfer and Solubility. Chem. Eng. Sci. 2000, 55, 5531.

[19]. Tan, C. S.; Lin, C. C.; Liu, W. T. Removal of Carbon Dioxide by Absorption in a Rotating Packed Bed. Ind. Eng. Chem. Res. 2003, 42, 2381.

[20]. Trevour, K.; James, R. F. Distillation Studies in a High-Gravity Contactor. Ind. Eng. Chem. Res. 1996, 35, 4646.

[21]. Tung, H. H.; Mah, R. S. H. Modeling of Liquid Mass Transfer in HIGEE Separation Process. Chem. Eng. Commun. 1985, 39, 147.

[22]. Xu, S.; Wang, Y. W.; Frederick, O. D.; Alan, M. E. Rate of Absorption of CO2 in a Mixed Solvent. Ind. Eng. Chem. Res. 1991, 30, 1213.

[23]. Xu, Z.; Zhang, C. F.; Qin, S. J.; Zheng, Z. S. A Kinetics Study on the Absorption of Carbon Dioxide into a Mixed Aqueous Solution of Methyldiethanolamine and Piperazine. Ind. Eng. Chem. Res. 2001, 40, 3785.

[24]. 潘守保，以混合醇胺溶液（MEA+AMP）吸收二氧化碳溫室效應氣體之可行性研究，交通大學環境工程所碩士論文，民國87年

[25]. 曾映棠，化學溶劑吸收再生法回收廢氣中二氧化碳之溶劑使用成本分析，交通大學環境工程所碩士論文，民國91年。

[26]. 經濟部工業局，以吸收法回收二氧化碳之技術手冊，九十一年十一月。

[27]. 林佳璋；劉文宗，二氧化碳回收技術，工研院化工所。