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Enhancement of CO2 Adsorption/Desorption Properties of Solid Sorbents Using Tetraethylenepentamine/Diethanolamine Blends
ACS Omega ( IF 3.7 ) Pub Date : 2020-09-04 , DOI: 10.1021/acsomega.0c01515 Duc Sy Dao 1, 2 , Hidetaka Yamada 2, 3 , Katsunori Yogo 2, 3
ACS Omega ( IF 3.7 ) Pub Date : 2020-09-04 , DOI: 10.1021/acsomega.0c01515 Duc Sy Dao 1, 2 , Hidetaka Yamada 2, 3 , Katsunori Yogo 2, 3
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Mesocellular silica foam was impregnated with tetraethylenepentamine (TEPA), diethanolamine (DEA), and their mixtures and examined as sorbents for CO2 capture. The sorbents were characterized by N2 physisorption, elemental analysis, and Fourier transform infrared spectroscopy. The effects of amine blending on the CO2 uptake, working capacity, and heat of adsorption were investigated and discussed. The experimental results showed that the heat of adsorption decreased with increasing DEA-to-TEPA ratios, but the CO2 uptake improved by the blending of TEPA and DEA. Furthermore, the DEA/TEPA blend considerably improved the regeneration properties of the sorbents. Mesocellular silica foam loaded with a mixture of 40 wt % TEPA and 30 wt % DEA exhibited a CO2 adsorption uptake of 5.91 mmol/g at 50 °C and 100 kPa with a heat of adsorption of 80 kJ/mol. Additionally, these sorbents demonstrated high cyclic stability and high selectivity toward CO2/N2 separation. In situ infrared spectroscopy investigations revealed that CO2 adsorption occurred predominantly through the formation of carbamate species for both TEPA and DEA.
中文翻译：
使用四亚乙基五胺/二乙醇胺共混物增强固体吸收剂的CO 2吸附/解吸性能
用四亚乙基五胺（TEPA），二乙醇胺（DEA）及其混合物浸渍介孔二氧化硅泡沫，并作为吸收剂进行CO 2捕集。通过N 2物理吸附，元素分析和傅里叶变换红外光谱对吸附剂进行表征。研究和讨论了胺共混对CO 2吸收，工作能力和吸附热的影响。实验结果表明，吸附热随着DEA / TEPA比的增加而降低，但CO 2TEPA和DEA的混合可改善摄取。此外，DEA / TEPA共混物大大改善了吸附剂的再生性能。负载有40重量％的TEPA和30重量％的DEA的混合物的中孔二氧化硅泡沫在50℃和100kPa下显示5.91mmol / g的CO 2吸附吸收，吸附热为80kJ / mol。另外，这些吸附剂显示出高的循环稳定性和对CO 2 / N 2分离的高选择性。原位红外光谱研究表明，对于TEPA和DEA ，CO 2吸附主要通过氨基甲酸酯类的形成而发生。
更新日期：2020-09-22
中文翻译：
使用四亚乙基五胺/二乙醇胺共混物增强固体吸收剂的CO 2吸附/解吸性能
用四亚乙基五胺（TEPA），二乙醇胺（DEA）及其混合物浸渍介孔二氧化硅泡沫，并作为吸收剂进行CO 2捕集。通过N 2物理吸附，元素分析和傅里叶变换红外光谱对吸附剂进行表征。研究和讨论了胺共混对CO 2吸收，工作能力和吸附热的影响。实验结果表明，吸附热随着DEA / TEPA比的增加而降低，但CO 2TEPA和DEA的混合可改善摄取。此外，DEA / TEPA共混物大大改善了吸附剂的再生性能。负载有40重量％的TEPA和30重量％的DEA的混合物的中孔二氧化硅泡沫在50℃和100kPa下显示5.91mmol / g的CO 2吸附吸收，吸附热为80kJ / mol。另外，这些吸附剂显示出高的循环稳定性和对CO 2 / N 2分离的高选择性。原位红外光谱研究表明，对于TEPA和DEA ，CO 2吸附主要通过氨基甲酸酯类的形成而发生。
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