位阻胺混合甘氨酸盐溶液吸收CO_2的研究

Absorption of carbon dioxide with aqueous blends of 2-amino-2-methyl-1-propanol and sodium glycinate.

在双搅拌反应釜中研究了位阻胺2-氨基-2-甲基-1-丙醇(AMP)与甘氨酸钠(SG)混合溶液吸收CO2的性能.实验温度293～313K,混合溶液的浓度为AMP(1.5kmol/m3)+SG(0.2,0.4,0.6,0.8kmol/m3),SG浓度每增加0.2kmol/m3,200min内的平均吸收速率分别提高11.47%,10.07%,9.18%和5.33%.与AMP单一溶液相比,混合溶液在200 min时的吸收容量增加了11.5%～41.1%.在293～313K,吸收速率随温度上升而提高.使用加热的方法进行再生实验,得到1.5 kmol/m3 AMP+0.6 kmol/m3 SG混合液的最适再生温度为378K.AMP+SG混合溶液的再生效率高于单一SG溶液及AMP+MEA/DEA混合溶液.

The absorption of carbon dioxide into aqueous blends of 2-amino-2-methyl-1-propanol（AMP） and sodium glycinate（SG） was investigated from 293k to 313k in a double stirred-cell contactor.Five systems of which 1.5 kmol/m3AMP mixed with various SG concentrations（0.2,0.4,0.6 and 0.8 kmol/m3） were studied.The average CO2 absorption rates increased（11.47%,10.07%,9.18% and 5.33%） with an increase of SG concentrations（0.2 kmol/m3 SG at a time）.Compared to 1.5 kmol/m3 AMP,the blends had an increase of absorption capacity of 11.5%～41.1% within 200 min.The absorption rates increased with an increase of temperature within the temperature range of 293k to 313k.The regenerating performance was also done by heating.The optimum regeneration temperature was 378 K for the mixture of 1.5 kmol/m3 AMP ＋ 0.6 kmol/m3 SG.The aqueous blends of AMP ＋ SG had a higher regenerating efficiency than either single SG or blends of AMP＋MEA/DEA.