2023
Copper Phosphinate Complexes as Molecular Precursors for Ethanol Dehydrogenation Catalysts
POKORNÝ, Tomáš; Iaroslav DOROSHENKO; Petr MACHÁČ; Lucie ŠIMONÍKOVÁ; Miroslava BITTOVÁ et. al.Základní údaje
Originální název
Copper Phosphinate Complexes as Molecular Precursors for Ethanol Dehydrogenation Catalysts
Autoři
POKORNÝ, Tomáš; Iaroslav DOROSHENKO; Petr MACHÁČ; Lucie ŠIMONÍKOVÁ; Miroslava BITTOVÁ; Zdeněk MORAVEC; Katerina KARASKOVA; David ŠKODA; Jiří PINKAS a Aleš STÝSKALÍK
Vydání
Inorganic Chemistry, WASHINGTON, American Chemical Society, 2023, 0020-1669
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10402 Inorganic and nuclear chemistry
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 4.300
Kód RIV
RIV/00216224:14310/23:00132907
Organizační jednotka
Přírodovědecká fakulta
UT WoS
001123849200001
EID Scopus
2-s2.0-85179608222
Klíčová slova anglicky
CONTINUOUS SYMMETRY MEASURES; CRYSTAL-STRUCTURES; MAGNETIC-PROPERTIES
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 25. 2. 2025 11:20, Mgr. Marie Novosadová Šípková, DiS.
Anotace
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).
Návaznosti
| EF18_046/0015974, projekt VaV |
| ||
| EH22_008/0004572, projekt VaV |
| ||
| GJ20-03636Y, projekt VaV |
| ||
| MUNI/A/1209/2022, interní kód MU |
| ||
| MUNI/A/1298/2022, interní kód MU |
| ||
| MUNI/A/1575/2023, interní kód MU |
| ||
| MUNI/A/1604/2023, interní kód MU |
| ||
| MUNI/J/0007/2021, interní kód MU |
| ||
| 90110, velká výzkumná infrastruktura |
| ||
| 90127, velká výzkumná infrastruktura |
| ||
| 90242, velká výzkumná infrastruktura |
| ||
| 90256, velká výzkumná infrastruktura |
|