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dc.contributor.authorBhatti, Umair H.
dc.contributor.authorShah, Abdul K.
dc.contributor.authorHussain, Amjad
dc.contributor.authorKhan, Hassnain Abbas
dc.contributor.authorPark, Chan Young
dc.contributor.authorNam, Sung Chan
dc.contributor.authorBaek, Il Hyun
dc.date.accessioned2019-12-10T11:33:41Z
dc.date.available2019-12-10T11:33:41Z
dc.date.issued2019-11-09
dc.identifier.citationBhatti, U. H., Shah, A. K., Hussain, A., Khan, H. A., Park, C. Y., Nam, S. C., & Baek, I. H. (2019). Catalytic activity of facilely synthesized mesoporous HZSM-5 catalysts for optimizing the CO2 desorption rate from CO2-rich amine solutions. Chemical Engineering Journal, 123439. doi:10.1016/j.cej.2019.123439
dc.identifier.doi10.1016/j.cej.2019.123439
dc.identifier.urihttp://hdl.handle.net/10754/660502
dc.description.abstractPost-combustion CO2 capture using aqueous alkanolamine solutions has a great potential to reduce anthropogenic CO2 emissions but the large-scale deployment of this technique is hindered due to a highly energy-intensive solvent regeneration mainly because of poor CO2 desorption kinetics. To overcome this limitation, we synthesized a series of mesoporous HZSM-5 catalysts through facile alkaline desilication and surfactant-induced re-assembly of dissolved species originating from the parent HZSM-5 crystals, and evaluated their performance to optimize the CO2 desorption rate from benchmark 30 wt% monoethanolamine (MEA) solution under mild temperature condition (40–82 °C). X-ray diffraction (XRD) patterns showed that the synthesized catalysts retained their crystallinity. Desilication by treatment in the alkaline medium led to a remarkable development of mesoporosity, with an increase in the Brunauer–Emmett–Teller (BET) surface area as well. The experimental results suggested that the synthesized catalysts significantly enhanced the CO2 desorption rate at low temperatures (up to 350–580% at ≤82 °C), improved the total amount of desorbed CO2 up to 60%, and minimized the heat duty by 24–37%. Detailed characterization revealed that the synergistic effect of higher mesoporosity and increased number of Lewis acid sites (LAS) and Brønsted acid sites (BAS) was crucial to improve the CO2 desorption rate. Based on the characterization and experimental results, a plausible reaction mechanism for catalyst aided CO2 desorption was also presented. This investigation highlights the role of catalysts in optimizing the CO2 capture process and presents new understanding for the design of high-performance catalysts for this purpose.
dc.description.sponsorshipThis authors acknowledge the financial support from “Next Generation Carbon Upcycling Project” (Project No. 2017M1A2A2043151) through the National Research Foundation (NRF) funded by the Ministry of Science and ICT, Republic of Korea.
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S1385894719328529
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Chemical Engineering Journal. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Chemical Engineering Journal, [[Volume], [Issue], (2019-01-01)] DOI: 10.1016/j.cej.2019.123439 . © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleCatalytic activity of facilely synthesized mesoporous HZSM-5 catalysts for optimizing the CO2 desorption rate from CO2-rich amine solutions
dc.typeArticle
dc.contributor.departmentClean Combustion Research Center
dc.identifier.journalChemical Engineering Journal
dc.eprint.versionPost-print
dc.contributor.institutionGreenhouse Gas Laboratory, Korea Institute of Energy Research, 217 Gajeong-ro Yuseong-gu, Daejeon 34129, South Korea
dc.contributor.institutionUniversity of Science and Technology, 217 Gajeong-ro Yuseong-gu, Daejeon 34113, South Korea
dc.contributor.institutionDepartment of Chemical Engineering, Dawood University of Engineering and Technology Karachi, Pakistan
dc.contributor.institutionFuel Cell Research Center, Korea Institute of Energy Research, 217 Gajeong-ro Yuseong-gu, Daejeon 34129, South Korea
kaust.personKhan, Hassnain Abbas
refterms.dateFOA2019-12-11T07:19:50Z
dc.date.published-online2019-11-09
dc.date.published-print2019-11


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