Detailed Information on Publication Record
2023
Copper Phosphinate Complexes as Molecular Precursors for Ethanol Dehydrogenation Catalysts
POKORNÝ, Tomáš, Iaroslav DOROSHENKO, Petr MACHÁČ, Lucie ŠIMONÍKOVÁ, Miroslava BITTOVÁ et. al.Basic information
Original name
Copper Phosphinate Complexes as Molecular Precursors for Ethanol Dehydrogenation Catalysts
Authors
POKORNÝ, Tomáš (203 Czech Republic, belonging to the institution), Iaroslav DOROSHENKO (203 Czech Republic, belonging to the institution), Petr MACHÁČ (203 Czech Republic, belonging to the institution), Lucie ŠIMONÍKOVÁ (203 Czech Republic, belonging to the institution), Miroslava BITTOVÁ (203 Czech Republic, belonging to the institution), Zdeněk MORAVEC (203 Czech Republic, belonging to the institution), Katerina KARASKOVA (203 Czech Republic), David ŠKODA (203 Czech Republic), Jiří PINKAS (203 Czech Republic, belonging to the institution) and Aleš STÝSKALÍK (203 Czech Republic, guarantor, belonging to the institution)
Edition
Inorganic Chemistry, WASHINGTON, American Chemical Society, 2023, 0020-1669
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10402 Inorganic and nuclear chemistry
Country of publisher
United States of America
Confidentiality degree
není předmětem státního či obchodního tajemství
References:
Impact factor
Impact factor: 4.600 in 2022
RIV identification code
RIV/00216224:14310/23:00132907
Organization unit
Faculty of Science
UT WoS
001123849200001
Keywords in English
CONTINUOUS SYMMETRY MEASURES; CRYSTAL-STRUCTURES; MAGNETIC-PROPERTIES
Tags
International impact, Reviewed
Změněno: 11/4/2024 10:29, Mgr. Marie Šípková, DiS.
Abstract
V originále
Nowadays, the production of acetaldehyde heavily relies on the petroleum industry. Developing new catalysts for the ethanol dehydrogenation process that could sustainably substitute current acetaldehyde production methods is highly desired. Among the ethanol dehydrogenation catalysts, copper-based materials have been intensively studied. Unfortunately, the Cu-based catalysts suffer from sintering and coking, which lead to rapid deactivation with time-on-stream. Phosphorus doping has been demonstrated to diminish coking in methanol dehydrogenation, fluid catalytic cracking, and ethanol-to-olefin reactions. This work reports a pioneering application of the well-characterized copper phosphinate complexes as molecular precursors for copper-based ethanol dehydrogenation catalysts enriched with phosphate groups (Cu-phosphate/SiO2). Three new catalysts (CuP-1, CuP-2, and CuP-3), prepared by the deposition of complexes {Cu(SAAP)}(n) (1), [Cu-6(BSAAP)(6)] (2), and [Cu-3(NAAP)(3)] (3) on the surface of commercial SiO2, calcination at 500 degrees C, and reduction in the stream of the forming gas 5% H-2/N-2 at 400 degrees C, exhibited unusual properties. First, the catalysts showed a rapid increase in catalytic activity. After reaching the maximum conversion, the catalyst started to deactivate. The unusual behavior could be explained by the presence of the phosphate phase, which made Cu2+ reduction more difficult. The phosphorus content gradually decreased during time-on-stream, copper was reduced, and the activity increased. The deactivation of the catalyst could be related to the copper diffusion processes. The most active CuP-1 catalyst reaches a maximum of 73% ethanol conversion and over 98% acetaldehyde selectivity at 325 degrees C and WHSV = 2.37 h(-1).
Links
| EF18_046/0015974, research and development project |
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| EH22_008/0004572, research and development project |
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| GJ20-03636Y, research and development project |
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| LM2018127, research and development project |
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| LM2023042, research and development project |
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| MUNI/A/1209/2022, interní kód MU |
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| MUNI/A/1298/2022, interní kód MU |
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| MUNI/J/0007/2021, interní kód MU |
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| 90110, large research infrastructures |
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| 90242, large research infrastructures |
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