Please use this identifier to cite or link to this item: https://dspace.iiti.ac.in/handle/123456789/11547
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dc.contributor.authorKulkarni, Vaishnavien_US
dc.contributor.authorPanda, Debashisen_US
dc.contributor.authorSingh, Sanjay Kumaren_US
dc.date.accessioned2023-04-11T11:16:10Z-
dc.date.available2023-04-11T11:16:10Z-
dc.date.issued2022-
dc.identifier.citationKulkarni, V., Panda, D., & Singh, S. K. (2022). Direct air capture of CO2 over amine-modified hierarchical silica. Industrial and Engineering Chemistry Research, doi:10.1021/acs.iecr.2c02268en_US
dc.identifier.issn0888-5885-
dc.identifier.otherEID(2-s2.0-85147822909)-
dc.identifier.urihttps://doi.org/10.1021/acs.iecr.2c02268-
dc.identifier.urihttps://dspace.iiti.ac.in/handle/123456789/11547-
dc.description.abstractThe current study reports the utilization of tetraethylenepentamine (TEPA)-modified hierarchical silica particles having bimodal meso/macroporosity for CO2 capture under simulated direct air capture (DAC) conditions (400 ppm CO2 in He). Results infer a typical relation between TEPA loading and CO2 capture, where TEPA-impregnated HS (HS-TEPA-70) exhibits exceptionally high CO2 uptake (5.20 mmol/g), shorter adsorption half time (110 min), and excellent amine efficiency (0.32 mmol of CO2/mmol of N) with moderate CO2/N2 selectivity at 30 °C under DAC conditions. HS-TEPA-70 also showed appreciable CO2 adsorption performance (5.88 mmol/g) under humid conditions (50 ± 3% RH) with 400 ppm CO2 in He at 30 °C. TEPA-impregnated HS even displays better thermal stability up to 10 consecutive adsorption-desorption cycles with minimal amine leaching and moderate CO2 regeneration energy. Moreover, the pelletized form of HS-TEPA-70 also demonstrates better CO2 adsorption performance (3.34 mmol/g), which makes it a promising candidate for CO2 capture from ambient air by temperature swing adsorption. © 2023 American Chemical Society.en_US
dc.language.isoenen_US
dc.publisherAmerican Chemical Societyen_US
dc.sourceIndustrial and Engineering Chemistry Researchen_US
dc.subjectAdsorptionen_US
dc.subjectSilicaen_US
dc.subject'currenten_US
dc.subjectAdsorption performanceen_US
dc.subjectAdsorption-desorption cyclesen_US
dc.subjectAir capturesen_US
dc.subjectCO 2 uptakeen_US
dc.subjectConditionen_US
dc.subjectHumid conditionsen_US
dc.subjectMacro-porosityen_US
dc.subjectSilica particlesen_US
dc.subjectTetraethylenepentamineen_US
dc.subjectCarbon dioxideen_US
dc.titleDirect Air Capture of CO2 over Amine-Modified Hierarchical Silicaen_US
dc.typeJournal Articleen_US
Appears in Collections:Department of Chemistry

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