{"title":"In-situ IR Study on Stability of Epoxide-Functionalized Polyethyleneimine CO2 Adsorbent to NO2 and SO2 Gases","authors":"Seong Won Pyo, Clinton Manianglung, Young Soo Ko","doi":"10.1007/s11814-024-00350-8","DOIUrl":null,"url":null,"abstract":"<div><p>This study investigates the stability of amine-impregnated CO<sub>2</sub> adsorbents, specifically polyethyleneimine (PEI) and epoxybutane-modified PEI (EB-PEI), when exposed to acidic gases like SO<sub>2</sub> and NO<sub>2</sub>. Using <i>in-situ</i> FT-IR spectroscopy, the formation of degradation products such as nitro groups, NH<sub>2</sub>–SO<sub>2</sub>, NH<sub>2</sub>–NO<sub>2</sub> complexes, and amides was identified. These degradation species were observed to form more rapidly at higher temperatures, with NO<sub>2</sub> causing more significant oxidation compared to SO<sub>2</sub>. The study evaluated the impact of acid gas exposure on CO<sub>2</sub> adsorption performance, revealing that higher concentrations of acidic gases led to a substantial decrease in adsorption capacity. SO<sub>2</sub> had a more detrimental effect on the CO<sub>2</sub> adsorption capacity than NO<sub>2</sub>, and EB-PEI exhibited greater resistance to SO<sub>2</sub> due to its higher proportion of secondary amines.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 1","pages":"179 - 193"},"PeriodicalIF":2.9000,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Korean Journal of Chemical Engineering","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s11814-024-00350-8","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
This study investigates the stability of amine-impregnated CO2 adsorbents, specifically polyethyleneimine (PEI) and epoxybutane-modified PEI (EB-PEI), when exposed to acidic gases like SO2 and NO2. Using in-situ FT-IR spectroscopy, the formation of degradation products such as nitro groups, NH2–SO2, NH2–NO2 complexes, and amides was identified. These degradation species were observed to form more rapidly at higher temperatures, with NO2 causing more significant oxidation compared to SO2. The study evaluated the impact of acid gas exposure on CO2 adsorption performance, revealing that higher concentrations of acidic gases led to a substantial decrease in adsorption capacity. SO2 had a more detrimental effect on the CO2 adsorption capacity than NO2, and EB-PEI exhibited greater resistance to SO2 due to its higher proportion of secondary amines.
期刊介绍：
The Korean Journal of Chemical Engineering provides a global forum for the dissemination of research in chemical engineering. The Journal publishes significant research results obtained in the Asia-Pacific region, and simultaneously introduces recent technical progress made in other areas of the world to this region. Submitted research papers must be of potential industrial significance and specifically concerned with chemical engineering. The editors will give preference to papers having a clearly stated practical scope and applicability in the areas of chemical engineering, and to those where new theoretical concepts are supported by new experimental details. The Journal also regularly publishes featured reviews on emerging and industrially important subjects of chemical engineering as well as selected papers presented at international conferences on the subjects.
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