Copper Phosphinate Complexes as Molecular Precursors for Ethanol Dehydrogenation Catalysts

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F23%3A00132907" target="_blank" >RIV/00216224:14310/23:00132907 - isvavai.cz</a>

Alternative codes found

RIV/70883521:28610/23:63571779 RIV/61989100:27710/23:10253641

Result on the web

<a href="https://pubs.acs.org/doi/full/10.1021/acs.inorgchem.3c01678" target="_blank" >https://pubs.acs.org/doi/full/10.1021/acs.inorgchem.3c01678</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.inorgchem.3c01678" target="_blank" >10.1021/acs.inorgchem.3c01678</a>

Result language

angličtina

Original language name

Copper Phosphinate Complexes as Molecular Precursors for Ethanol Dehydrogenation Catalysts

Original language description

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).

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10402 - Inorganic and nuclear chemistry

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Inorganic Chemistry

ISSN

0020-1669

e-ISSN

—

Volume of the periodical

62

Issue of the periodical within the volume

49

Country of publishing house

US - UNITED STATES

Number of pages

16

Pages from-to

19871-19886

UT code for WoS article

001123849200001

EID of the result in the Scopus database

2-s2.0-85179608222