Properties of Pd–Ag/C Catalysts in the Reaction of Selective Hydrogenation of Acetylene Full article
| Journal |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Output data | Year: 2017, Volume: 58, Number: 5, Pages: 649-654 Pages count : 6 DOI: 10.1134/S0023158417050020 | ||||
| Tags | acetylene, carbon nanofibers, catalyst, hydrogenation, palladium, silver | ||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Russian Science Foundation | 15-13-10043 |
Abstract:
Samples of Pd/C and Pd–Ag/C, where C represents carbon nanofibers (CNFs), are synthesized
by methane decomposition on a Ni–Cu–Fe/Al2O3 catalyst. The properties of Pd/CNF are studied in the
reaction of selective hydrogenation of acetylene into ethylene. It is found that the activity of the catalyst in
hydrogenation reaction increases, while selectivity decreases considerably when the palladium content rises.
The obtained dependences are caused by the features of palladium’s interaction with the carbon support. At
a low Pd content (up to 0.04 wt %) in the catalyst, the metal is inserted into the interlayer space of graphite
and the catalytic activity is zero. It is established by EXAFS that the main share of palladium in catalysts of
0.05–0.1 wt % Pd/CNF constitutes the metal in the atomically dispersed state. The coordination environment
of palladium atoms consists of carbon atoms. An increase in the palladium content in a Pd/CNF catalyst
up to 0.3 wt % leads to the formation of highly dispersed (0.8–1 nm) Pd particles. The Pd/CNF samples
where palladium is mainly in the atomically dispersed state exhibit the highest selectivity in the acetylene
hydrogenation reaction. The addition of silver to a 0.1 wt % Pd/CNF catalyst initially probably leads to the
formation of Pd–Ag clusters and then to alloyed Pd–Ag particles. An increase in the silver content in the catalyst
above 0.3% causes the enlargement of the alloyed particles and the palladium atoms are blocked by a
silver layer, which considerably decreases the catalytic activity in the selective hydrogenation of acetylene.
Cite:
Chesnokov V.V.
, Chichkan A.S.
, Ismagilov Z.R.
Properties of Pd–Ag/C Catalysts in the Reaction of Selective Hydrogenation of Acetylene
Kinetics and Catalysis. 2017. V.58. N5. P.649-654. DOI: 10.1134/S0023158417050020 WOS Scopus РИНЦ AN OpenAlex
Properties of Pd–Ag/C Catalysts in the Reaction of Selective Hydrogenation of Acetylene
Kinetics and Catalysis. 2017. V.58. N5. P.649-654. DOI: 10.1134/S0023158417050020 WOS Scopus РИНЦ AN OpenAlex
Original:
Чесноков В.В.
, Чичкань А.С.
, Исмагилов З.Р.
Свойства Pd–Ag/С-катализаторов в реакции селективного гидрирования ацетилена
Кинетика и катализ. 2017. Т.58. №5. С.662-667. DOI: 10.7868/S0453881117050021 РИНЦ OpenAlex
Свойства Pd–Ag/С-катализаторов в реакции селективного гидрирования ацетилена
Кинетика и катализ. 2017. Т.58. №5. С.662-667. DOI: 10.7868/S0453881117050021 РИНЦ OpenAlex
Dates:
| Submitted: | Jan 31, 2017 |
| Published print: | Sep 1, 2017 |
| Published online: | Sep 30, 2017 |
Identifiers:
| Web of science: | WOS:000411992000019 |
| Scopus: | 2-s2.0-85030652632 |
| Elibrary: | 31062155 |
| Chemical Abstracts: | 2017:1586818 |
| OpenAlex: | W2760363600 |