Introduction of cross-linking agents to enhance the performance and chemical stability of polyethyleneimine-impregnated CO2 adsorbents: Effect of different alkyl chain lengths
DC Field | Value | Language |
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dc.contributor.author | Jeon, Sunbin | - |
dc.contributor.author | Min, Jinseo | - |
dc.contributor.author | Kim, Sung Hyun | - |
dc.contributor.author | Lee, Ki Bong | - |
dc.date.accessioned | 2021-08-30T10:51:48Z | - |
dc.date.available | 2021-08-30T10:51:48Z | - |
dc.date.created | 2021-06-19 | - |
dc.date.issued | 2020-10-15 | - |
dc.identifier.issn | 1385-8947 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/52445 | - |
dc.description.abstract | Polyethyleneimine (PEI)-functionalized silica-based CO2 adsorbents are well known to irreversibly form urea during the regeneration process at high temperatures and under CO2-rich atmospheric conditions. The formation of urea is a critical drawback that substantially reduces the cyclic performance of PEI-functionalized adsorbents. In this study, epoxy cross-linkers were introduced to PEI to suppress the formation of urea. Pristine PEI and epoxy cross-linked PEI were impregnated into mesostructured cellular foam silica using a dry impregnation method. In particular, epoxy cross-linkers with different alkyl chain lengths were used, and the effect of the alkyl chain length of the cross-linkers on the chemical stability and CO2 adsorption performance of adsorbents was scrutinized. The suppression of urea formation improved as the alkyl chain length of the cross-linkers increased. The adsorbent functionalized with epoxy cross-linked PEI exhibited an approximately three times higher working capacity (0.71 mmol g(-1)) than the adsorbent functionalized with pristine PEI (0.23 mmol g(-1)) after 40 rapid cycles comprising adsorption at 100 degrees C with 15% CO2 balanced by N-2 for 10 min and regeneration at 130 degrees C with 100% CO2 for 5 min. It is believed that the alkyl chain of the cross-linkers acted as a spacer that could hinder the urea formation, enhancing the chemical stability and CO2 adsorption performance of PEI-functionalized adsorbents. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ELSEVIER SCIENCE SA | - |
dc.subject | CARBON-DIOXIDE CAPTURE | - |
dc.subject | CO2-INDUCED DEGRADATION | - |
dc.subject | ADSORPTIVE REMOVAL | - |
dc.subject | MESOPOROUS SILICA | - |
dc.subject | THERMAL-STABILITY | - |
dc.subject | SORBENTS | - |
dc.subject | FOAM | - |
dc.subject | CAPACITY | - |
dc.subject | AMINES | - |
dc.title | Introduction of cross-linking agents to enhance the performance and chemical stability of polyethyleneimine-impregnated CO2 adsorbents: Effect of different alkyl chain lengths | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Lee, Ki Bong | - |
dc.identifier.doi | 10.1016/j.cej.2020.125531 | - |
dc.identifier.scopusid | 2-s2.0-85085647891 | - |
dc.identifier.wosid | 000561588300005 | - |
dc.identifier.bibliographicCitation | CHEMICAL ENGINEERING JOURNAL, v.398 | - |
dc.relation.isPartOf | CHEMICAL ENGINEERING JOURNAL | - |
dc.citation.title | CHEMICAL ENGINEERING JOURNAL | - |
dc.citation.volume | 398 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalWebOfScienceCategory | Engineering, Environmental | - |
dc.relation.journalWebOfScienceCategory | Engineering, Chemical | - |
dc.subject.keywordPlus | CARBON-DIOXIDE CAPTURE | - |
dc.subject.keywordPlus | CO2-INDUCED DEGRADATION | - |
dc.subject.keywordPlus | ADSORPTIVE REMOVAL | - |
dc.subject.keywordPlus | MESOPOROUS SILICA | - |
dc.subject.keywordPlus | THERMAL-STABILITY | - |
dc.subject.keywordPlus | SORBENTS | - |
dc.subject.keywordPlus | FOAM | - |
dc.subject.keywordPlus | CAPACITY | - |
dc.subject.keywordPlus | AMINES | - |
dc.subject.keywordAuthor | CO2 capture | - |
dc.subject.keywordAuthor | Cross-linked PEI | - |
dc.subject.keywordAuthor | Alkyl chain length | - |
dc.subject.keywordAuthor | Chemical stability | - |
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