Number of the records: 1
Cobalt-copper oxide catalysts for VOC abatement: effect of Co:Cu ratio on performance in ethanol oxidation
- 1.
SYSNO ASEP 0566710 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Cobalt-copper oxide catalysts for VOC abatement: effect of Co:Cu ratio on performance in ethanol oxidation Author(s) Kupková, K. (CZ)
Topka, Pavel (UCHP-M) RID, ORCID, SAI
Balabánová, Jana (UCHP-M) RID, ORCID, SAI
Koštejn, Martin (UCHP-M) RID, SAI, ORCID
Jirátová, Květa (UCHP-M) RID, ORCID, SAI
Giraudon, J.-M. (FR)
Lamonier, J.-F. (FR)
Maixner, J. (CZ)
Kovanda, F. (CZ)Article number 107 Source Title Catalysts. - : MDPI
Roč. 13, č. 1 (2023)Number of pages 18 s. Language eng - English Country CH - Switzerland Keywords cobalt-copper oxide catalysts ; synergistic effect ; ethanol total oxidation ; VOC abatement OECD category Chemical process engineering R&D Projects GA21-04477S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support UCHP-M - RVO:67985858 UT WOS 000914579500001 EID SCOPUS 85146708712 DOI 10.3390/catal13010107 Annotation The effect of the Co-Cu oxide catalysts composition on their physicochemical properties and performance in the deep oxidation of ethanol was studied. The catalysts with Co:Cu molar ratios of 4:1, 1:1, and 1:4 were obtained by calcination (4 h at 500 ◦C in air) of the coprecipitated precursors and characterized in detail using powder XRD, Raman spectroscopy, N2 physisorption, H2-TPR, and XPS. The powder XRD and Raman spectroscopy indicated the formation of Co3O4 and CuO mixtures rather than Co-Cu mixed oxides. The CuO promoted the Co3O4 reduction, the Co-Cu catalysts were reduced more easily than the single-component Co and Cu oxides and the main reduction maxima were shifted to lower temperatures with increasing cobalt content in the catalysts. The Co-Cu oxide catalyst with a Co:Cu molar ratio of 4:1 exhibited the best performance in ethanol gas-phase oxidation, showing the lowest T50 (91 ◦C) and T90(CO2) (159 ◦C) temperatures needed for 50% ethanol conversion and 90% conversion to CO2, respectively. The excellent catalytic properties of this Co-Cu oxide catalyst were ascribed to the synergistic effect of Co and Cu components. The high activity and selectivity of the Co-Cu catalyst was attributed to the presence of finely dispersed CuO particles on the surface of Co3O4. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2024 Electronic address https://www.mdpi.com/2073-4344/13/1/107
Number of the records: 1