Number of the records: 1
Surface Potassium Promotion of Co4MnAlO x in Direct NO Decomposition Generates the Same Type of Active Sites as Bulk Promotion
- 1.
SYSNO ASEP 0574284 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Surface Potassium Promotion of Co4MnAlO x in Direct NO Decomposition Generates the Same Type of Active Sites as Bulk Promotion Author(s) Bílková, T. (CZ)
Pacultová, K. (CZ)
Karásková, K. (CZ)
Fridrichová, D. (CZ)
Jirátová, Květa (UCHP-M) RID, ORCID, SAI
Koštejn, Martin (UCHP-M) RID, SAI, ORCID
Slowik, G. (PL)
Ritz, M. (CZ)
Haneda, M. (JP)
Obalová, L. (CZ)Source Title Industrial and Engineering Chemistry Research. - : American Chemical Society - ISSN 0888-5885
Roč. 62, č. 31 (2023), s. 12133-12151Number of pages 19 s. Language eng - English Country US - United States Keywords Al mixed-oxide ; alkali-metal promoters ; N2O decomposition ; reaction-mechanism OECD category Chemical process engineering Method of publishing Open access Institutional support UCHP-M - RVO:67985858 UT WOS 001034659700001 EID SCOPUS 85167775788 DOI 10.1021/acs.iecr.3c01011 Annotation K/Co4MnAlO x mixedoxidesare active in direct NO decomposition. This work investigates theeffect of the preparation method and K precursor type. Using the incipientwetness impregnation method, the modification by the required amountof K was ensured. Regardless of the K precursor type, similar NO conversionswere reached for samples modified by 4 wt % K. The optimal amountof K from the KNO3 precursor was evaluated as 2-6wt %. The physicochemical properties were carefully explored usingatomic absorption spectroscopy, X-ray photoelectron spectroscopy,X-ray diffraction, Fourier transform IR spectroscopy, N-2 physisorption, H-2 temperature-programmed reduction, CO2 and NO temperature-programmed desorption, scanning electronmicroscopy, and transmission electron microscopy, correlated withcatalytic properties in transient and steady state and compared withthe results obtained in our previous study using bulk modified samples.The present study underlines the effect of the preparation methodon the Brunauer-Emmett-Teller surface area (S (BET)) of prepared catalysts and thus the amountof active sites available for catalytic reaction. Moreover, the resultsemphasize the importance of catalyst basicity, which affects the amountof adsorbed NO2 (-) species, the key intermediatesin the direct NO catalytic reaction. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2024 Electronic address https://pubs.acs.org/doi/epdf/10.1021/acs.iecr.3c01011
Number of the records: 1