Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-24179
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dc.contributor.authorHack, Jannis-
dc.contributor.authorFrazzetto, Seraina-
dc.contributor.authorEvers, Leon-
dc.contributor.authorMaeda, Nobutaka-
dc.contributor.authorMeier, Daniel M.-
dc.date.accessioned2022-02-04T10:20:28Z-
dc.date.available2022-02-04T10:20:28Z-
dc.date.issued2022-
dc.identifier.issn1996-1073de_CH
dc.identifier.urihttps://digitalcollection.zhaw.ch/handle/11475/24179-
dc.description.abstractLowering the regeneration temperature for solid CO2‐capture materials is one of the critical tasks for economizing CO2‐capturing processes. Based on reported pKa values and nucleophilicity, we compared two different polyethylenimines (PEIs): branched PEI (BPEI) and linear PEI (LPEI). LPEI outperformed BPEI in terms of adsorption and desorption properties. Because LPEI is a solid below 73–75 °C, even a high loading amount of LPEI can effectively adsorb CO2 without diffusive barriers. Temperature‐programmed desorption (TPD) demonstrated that the desorption peak top dropped to 50.8 °C for LPEI, compared to 78.0 °C for BPEI. We also revisited the classical adsorption model of CO2 on secondary amines by using in situ modulation excitation IR spectroscopy, and proposed a new adsorption configuration, R1(R2)‐NCOOH. Even though LPEI is more expensive than BPEI, considering the long‐term operation of a CO2‐capturing system, the low regeneration temperature makes LPEI attractive for industrial applications.de_CH
dc.language.isoende_CH
dc.publisherMDPIde_CH
dc.relation.ispartofEnergiesde_CH
dc.rightshttp://creativecommons.org/licenses/by/4.0/de_CH
dc.subjectCO2-capturede_CH
dc.subjectRegeneration temperaturede_CH
dc.subjectPolyethyleniminede_CH
dc.subject.ddc660: Technische Chemiede_CH
dc.titleBranched versus linear structure : lowering the CO2 desorption temperature of polyethylenimine-functionalized silica adsorbentsde_CH
dc.typeBeitrag in wissenschaftlicher Zeitschriftde_CH
dcterms.typeTextde_CH
zhaw.departementSchool of Engineeringde_CH
zhaw.organisationalunitInstitute of Materials and Process Engineering (IMPE)de_CH
dc.identifier.doi10.3390/en15031075de_CH
dc.identifier.doi10.21256/zhaw-24179-
zhaw.funding.euNode_CH
zhaw.issue3de_CH
zhaw.originated.zhawYesde_CH
zhaw.pages.start1075de_CH
zhaw.publication.statuspublishedVersionde_CH
zhaw.volume15de_CH
zhaw.publication.reviewPeer review (Publikation)de_CH
zhaw.webfeedVerfahrenstechnikde_CH
zhaw.author.additionalNode_CH
zhaw.display.portraitYesde_CH
zhaw.monitoring.costperiod2022de_CH
Appears in collections:Publikationen School of Engineering

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