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首页> 外文期刊>AIChE Journal >CO2 Removal by Single and Mixed Amines in a Hollow-Fiber Membrane Module-Investigation of Contactor Performance
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CO2 Removal by Single and Mixed Amines in a Hollow-Fiber Membrane Module-Investigation of Contactor Performance

机译：中空纤维膜组件中单胺和混合胺的二氧化碳去除-接触器性能研究

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摘要

This work investigates CO2 removal by single and blended amines in a hollow-fiber membrane contactor (HFMC) under gas-filled and partially liquid-filled membrane pores conditions via a two-scale, nonisothermal, steady-state model accounting for CO2 diffusion in gas-filled pores, CO2 and amines diffusion/reaction within liquid-filled pores and CO2 and amines diffusion/reaction in liquid boundary layer. Model predictions were compared with CO2 absorption data under various experimental conditions. The model was used to analyze the effects of liquid and gas velocity, CO2 partial pressure, single (primary, secondary, tertiary, and sterically hindered alkanolamines) and mixed amines solution type, membrane wetting, and cocurrent/countercurrent flow orientation on the HFMC performance. An insignificant difference between the absorption in cocurrent and countercurrent flow was observed in this study. The membrane wetting decreases significantly the performance of hollow-fiber membrane module. The nonisothermal simulations reveal that the hollow-fiber membrane module operation can be considered as nearly isothermal. (c) 2014 American Institute of Chemical Engineers AIChE J, 61: 955-971, 2015
机译：这项工作研究了通过中空纤维膜接触器（HFMC）中单胺和混合胺在气体填充和部分液体填充的膜孔条件下去除CO2的方法，该方法通过考虑气体中CO2扩散的两尺度非等温稳态模型填充孔，CO2和胺在液体填充孔内的扩散/反应以及CO2和胺在液体边界层中的扩散/反应。将模型预测值与各种实验条件下的CO2吸收数据进行比较。该模型用于分析液体和气体速度，CO2分压，单一（伯，仲，叔和空间位阻链烷醇胺）和混合胺溶液类型，膜润湿性以及并流/逆流流动方向对HFMC性能的影响。在这项研究中观察到并流和逆流吸收之间的微不足道的差异。膜润湿会明显降低中空纤维膜组件的性能。非等温模拟表明，中空纤维膜组件的运行可被视为接近等温。 （c）2014美国化学工程师学会AIChE J，61：955-971，2015

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