Towards high CO2 conversions using Cu/Zn catalysts supported on aluminum fumarate metal-organic framework for methanol synthesis

dc.contributor.authorDuma, Zama G.
dc.contributor.authorMoma, John
dc.contributor.authorLangmi, Henrietta Wakuna
dc.contributor.authorLouis, Benoit
dc.contributor.authorParkhomenko, Ksenia
dc.contributor.authorMusyoka, Nicholas M.
dc.date.accessioned2023-05-08T12:52:07Z
dc.date.available2023-05-08T12:52:07Z
dc.date.issued2022-09-24
dc.descriptionSUPPLEMENTARY MATERIAL : FIGURE S1: Individual elemental maps of 7Cu/3Zn/AlFum MOF. (a) Al K 1; (b) Cu K 1; and (c) Zn K 1; FIGURE S2: Individual elemental maps of 15Cu/6.4Zn/AlFum MOF. (a) Al K 1; (b) Cu K 1; and (c) Zn K 1; FIGURE S3: Derivative TGA plot of AlFum MOF. FIGURE S4: Derivative TGA plot of 7Cu/3ZnO/AlFum MOF; FIGURE S5: Derivative TGA plot of 15Cu/6.4ZnO/AlFum MOF.en_US
dc.description.abstractGreen methanol is a viable alternative for the storage of hydrogen and may be produced from captured anthropogenic sources of carbon dioxide. The latter was hydrogenated over Cu-ZnO catalysts supported on an aluminum fumarate metal-organic framework (AlFum MOF). The catalysts, prepared via slurry phase impregnation, were assessed for thermocatalytic hydrogenation of CO2 to methanol. PXRD, FTIR, and SBET exhibited a decrease in crystallinity of the AlFum MOF support after impregnation with Cu-Zn active sites. SEM, SEM-EDS, and TEM revealed that the morphology of the support is preserved after metal loading, where H2-TPR confirmed the presence of active sites for hydrogen uptake. The catalysts exhibited good activity, with a doubling in Cu and Zn loading over the AlFum MOF, resulting in a 4-fold increase in CO2 conversions from 10.8% to 45.6% and an increase in methanol productivity from 34.4 to 56.5 gMeOH/Kgcat/h. The catalysts exhibited comparatively high CO selectivity and high yields of H2O, thereby favoring the reverse water-gas shift reaction. The selectivity of the catalysts towards methanol was found to be 12.9% and 6.9%. The performance of the catalyst supported on AlFum MOF further highlights the potential use of MOFs as supports in the heterogeneous thermocatalytic conversion of CO2 to value-added products.en_US
dc.description.departmentChemistryen_US
dc.description.librarianam2023en_US
dc.description.sponsorshipThe Royal Society- Foreign, Commonwealth & Development Office (FCDO) Africa Capacity Building Initiative (ACBI) Programme, the Council for Scientific and Industrial Research (CSIR), the South African Department of Science and Innovation (DSI) for research activities under HySA Infrastructure and the South Africa—France PROTEA Programme..en_US
dc.description.urihttps://www.mdpi.com/journal/catalystsen_US
dc.identifier.citationDuma, Z.G.; Moma, J.; Langmi, H.W.; Louis, B.; Parkhomenko, K.; Musyoka, N.M. Towards High CO2 Conversions Using Cu/Zn Catalysts Supported on Aluminum Fumarate Metal-Organic Framework for Methanol Synthesis. Catalysts 2022, 12, 1104. https://DOI.org/10.3390/catal12101104.en_US
dc.identifier.issn2073-4344 (online)
dc.identifier.other10.3390/catal12101104
dc.identifier.urihttp://hdl.handle.net/2263/90598
dc.language.isoenen_US
dc.publisherMDPIen_US
dc.rights© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.en_US
dc.subjectCO2 hydrogenationen_US
dc.subjectGreen methanolen_US
dc.subjectReverse water-gas shift reactionen_US
dc.subjectMetal-organic frameworksen_US
dc.subjectCatalysisen_US
dc.subjectAluminum fumarate metal-organic framework (AlFum MOF)en_US
dc.titleTowards high CO2 conversions using Cu/Zn catalysts supported on aluminum fumarate metal-organic framework for methanol synthesisen_US
dc.typeArticleen_US

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