Mészáros, Rebeka Ildikó and Szabó, Vivien and Kutus, Bence and Baán, Kornélia and Kónya, Zoltán and Kukovecz, Ákos and Sipos, Pál Miklós and Szabados, Márton (2024) Continuous-flow hydrogenation of cinnamaldehyde over catalysts derived from modified CoAl4 layered double hydroxides incorporating Mn, Ni, Cu and Zn ions. APPLIED CATALYSIS A-GENERAL, 679. No.-119738. ISSN 0926-860X
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Abstract
Series of CoxM1-xAl4 layered triple hydroxides, LTHs were prepared as catalyst precursors for hydrogenation of biomass compound cinnamaldehyde under flow and batch reaction conditions. To this end, we have successfully extended the eco-friendly family of Al-rich layered double hydroxides (LDHs) by synthesizing MnAl4-LDHs, furthermore Co3Al-, Co2Al-LDHs were also exploited. Both the magnetic Co-rich and Al-rich reduced forms behaved as robust, efficient and reusable catalysts with significantly different selectivities correlated with their acid-base properties. Al-rich solids showed increased acidity and lower basicity resulting in high hydrocinnamaldehyde selectivity (~75 %), while the Co-rich catalysts attested enhanced hydrocinnamyl alcohol production (~80 % selectivity) due to their low acidity and high basicity (mapped by NH3/CO2 temperature programmed desorption tests). Incorporation of Mn, Ni, Cu and Zn ions generally decreased the total acidity of Al-rich catalysts, while their Lewis basicity largely increased: the highest was found for Mn, resulting in activity similar to that of Co-rich catalysts.
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| Additional Information: | Institute of Pharmaceutical Chemistry, University of Szeged, Eötvös utca 6, Szeged, H-6720, Hungary Materials and Solution Structure Research Group, Interdisciplinary Excellence Centre, Institute of Chemistry, University of Szeged, Aradi vértanúk tere 1, Szeged, H-6720, Hungary Department of Molecular and Analytical Chemistry, University of Szeged, Dóm tér 7-8, Szeged, H-6720, Hungary Department of Applied and Environmental Chemistry, University of Szeged, Rerrich B. tér 1, Szeged, H-6720, Hungary MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, Rerrich B. tér 1, Szeged, H-6720, Hungary Export Date: 8 May 2024 CODEN: ACAGE Correspondence Address: Szabados, M.; Materials and Solution Structure Research Group, Aradi vértanúk tere 1, Hungary; email: szabados.marton@chem.u-szeged.hu Funding details: Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFIH, GINOP-2.3.4-15-2020-00006 Funding details: BO/00246/21/7 Funding details: Magyar Tudományos Akadémia, MTA, ÚNKP-23-5-SZTE-714, ÚNKP-22-5-SZTE-589 Funding text 1: The authors are very thankful for the financial support from the National Research, Development and Innovation Office (GINOP-2.3.4-15-2020-00006). M\\u00E1rton Szabados gratefully acknowledges the support of Bolyai Janos Research Fellowship (BO/00246/21/7) of the Hungarian Academy of Science and the \\u00DANKP-23-5-SZTE-714 New National Excellence Program of the Ministry for the Innovation and Technology from the Source of the National Research, Development and Innovation Office. Funding text 2: The authors are very thankful for the financial support from the National Research, Development and Innovation Office (GINOP-2.3.4-15-2020-00006). M\\u00E1rton Szabados gratefully acknowledges the support of Bolyai Janos Research Fellowship (BO/00246/21/7) of the Hungarian Academy of Science and the \\u00DANKP-22-5-SZTE-589 New National Excellence Program of the Ministry for the Innovation and Technology from the Source of the National Research, Development and Innovation Office. |
| Uncontrolled Keywords: | Gibbsite based LDHs, Flow and batch reaction, Hydrogenation of cinnamaldehyde, Key acid-base properties, Long-term scale up tests |
| Subjects: | Q Science / természettudomány > QD Chemistry / kémia |
| SWORD Depositor: | MTMT SWORD |
| Depositing User: | MTMT SWORD |
| Date Deposited: | 20 Sep 2024 06:47 |
| Last Modified: | 20 Sep 2024 07:20 |
| URI: | https://real.mtak.hu/id/eprint/205302 |
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