使用中空纖維模組去除二氧化碳氣體研究

Study on the Use of Hollow Fiber Membrane Module for CO2 Removal

吳慶鴻(Ching-Hung Wu)

指導教授 ： 張煖

淡江大學/工學院/化學工程與材料工程學系碩士班/碩士(2005年)

https://doi.org/10.6846/TKU.2005.00767

摘要

本研究使用多孔性聚乙烯疏水材質之中空纖維模組探討利用單乙醇胺水溶液吸收二氧化碳氣體之性能。本研究建立了一個考慮非平衡與平衡反應及熱質傳，並使用electrolyte-NRTL熱力模式之嚴謹模式用以決定化學吸收之加強因子，並透過最小化實驗與模式預測結果差異之方法，回歸出適用於本實驗模組之殼側質傳係數關聯式與兩實驗模組之有效界面面積。薄膜內部份濕潤之概念無法解釋本實驗模組之吸收性能，有效界面面積則可有效回歸模式與實驗結果。吸收效率主要受進氣流量及吸收液溫度之影響。質傳阻力主要在氣相。針對燃煤與燃天然氣煙道氣之處理，進氣流量之提高主要須透過模組長度之調整使達要求之去除效率。

關鍵字

二氧化碳回收 ； 單乙醇胺 ； 滲透吸收 ； 中空纖維薄膜模組

並列摘要

The performance of carbon dioxide absorption by aqueous monoethanolamine solution is investigated via both experiments and a rigorous mathematical model. Two different size microporous polyproplyene hollow fiber membrane modules are used for experiments. The rigorous mathematical model considers the complex chemical absorption mechanism, including kinetic and equilibrium reactions, and heat and mass transports. Incorporating the experimental results with the mathematical model allows the determination of the correlation for shell side mass transfer coefficient as well as the effective interfacial areas of two modules. The concept of partial wetting inside membrane cannot explain the performance of the experimental modules. The most significant operating conditions affecting the absorption efficiency are the inlet gas flow rate and absorbent temperature. The major mass transfer resistance occurs in the gas side. For the coal-fired and natural gas-fired flue gas treatment, the required module length for different inlet gas flow rate is analyzed.

並列關鍵字

carbon dioxide recovery ； monoethanolamine ； permeation absorption ； modeling ； hollow fiber membrane module

參考文獻

Astarita, G. (1967), Mass Transfer with Chemical Reaction, Amsterdam, Elsevier.

Astarita, G., D.W. Savage and A. Bisio (1983), Gas Treating with Chemical Solvents, John Wiley & Sons, Inc., New York.

Austgen, D. M. (1989), A Model of Vapor–Liquid Equilibria for acid Gas–Alkanolamine–water System, Ph. D. Dissertation, The University of Texas at Austin.

Bates, R. G. and G. D. Pinching, (1951), “Acidic Dissociation Constant and Related Thermodynamic Quantities for Monoethanolammonium Ion in Water from 0 to 50℃,” J. Res. Nat. Bur. Stand., 46 (5), 349.

Bhaumik S., S. Majumdar, K.K. Sirkar (1996), “Hollow-Fiber Membrane-Based Rapid Pressure Swing Absorption,” AIChE J., 42, (2), 409.