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摘要
钙法是一种利用Ca（OH）2夺取MDEA/PG富液中CO2并以CaCO3的形式解吸富液、固定CO2的一种低能耗、低成本的一体化化学再生方法。针对其工艺过程，通过单因素试验分析并考察投加方式、投加量、CO2负荷、解吸温度、搅拌速率对CO2解吸率的影响。结果表明，解吸效果最佳工况为CO2负荷为0.8 mol/L、0.5 mol Ca（OH）2+0.5 mol Ca（OH）2、CO2与Ca（OH）2摩尔比为1：1、反应时间为15 min、解吸温度为20℃及搅拌速率为800 r/min。
Abstract
Calcium method,which uses Ca(OH)2 to capture CO2 from MDEA/PG rich solution and fix CO2 in the form of CaCO3,is a low energy consumption and low-cost chemical regeneration method.In view of the process of coupled desorption and mineralization,the effects of Ca(OH)2 dosage,CO2 loading amount,temperature and stirring speed on desorption rate are analyzed and explored through single factor test.It is indicated that the best desorption rate can be reached under the conditions that the loading amount of CO2 is 0.8 mol·L-1,0.5 mol Ca(OH)2+0.5 mol Ca(OH)2,the molar ratio of CO2 to Ca(OH)2 is 1:1,the reaction lasts for 15 min,the temperature is at 20℃ and the stirring speed is 800 r·min-1.
关键词
二氧化碳
/
再生工艺
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解吸率
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矿化
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胺溶液
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氢氧化钙
Key words
carbon dioxide
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regeneration process
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desorption rate
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mineralization
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amine solution
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calcium hydroxide
基于钙法的燃煤烟气中CO2混合富液解吸及再生研究[J].
现代化工, 2020, 40(10): 115-119 DOI:10.16606/j.cnki.issn0253-4320.2020.10.024
