Dry Reforming of Methane over Pt/PrCeZrO Catalyst: Kinetic and Mechanistic Features by Transient Studies and Their Modeling Full article
| Conference |
9th Natural Gas Conversion Symposium 30 May - 3 Jun 2010 , Lyon |
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| Journal |
Catalysis Today
ISSN: 0920-5861 , E-ISSN: 1873-4308 |
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| Output data | Year: 2011, Volume: 171, Number: 1, Pages: 140-149 Pages count : 10 DOI: 10.1016/j.cattod.2011.04.004 | ||||||
| Tags | Fluorite-like oxides, Kinetics, Mechanism, Methane dry reforming, Modeling, Pt, Transient studies | ||||||
| Authors |
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| Affiliations |
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Funding (4)
| 1 | Russian Foundation for Basic Research | 09-03-93112 |
| 2 | Siberian Branch of the Russian Academy of Sciences | 107 |
| 3 | French Embassy in Moscow | |
| 4 | European Commission | 228953 FP7-NMP-2008-LARGE-2 OCMOL |
Abstract:
The effect of pretreatment and Pt content on the catalytic properties as well as mechanistic features of DR were investigated for structured catalysts comprised of Pt supported on CeO2–ZrO2 oxide doped by Pr. Progressive reduction of cationic Pt species by the reaction feed lowers the activity in CH4 dry reforming while accelerating the reverse water gas shift reaction catalyzed only by Pt0, which then decreases progressively the H2/CO ratio in the effluent. This process is counteracted by the mobility of surface oxygen supplying oxygen atoms to reduced Pt centers thus ensuring their reoxidation and generating in parallel surface oxygen vacancies for the dissociation of CO2.
A mathematical model and software were developed for numerically studying the transients of the complex catalytic reactions. The processing of experimental data was fulfilled taking into account the importance of cationic forms of Pt, reactivity of carbonate complexes coordinated to these cations and oxygen surface/bulk diffusion. A quantitative evaluation of the density of catalyst's active sites and their coverage by reactive species was accomplished and the rates both of the lattice oxygen diffusion and main stages of the catalytic reaction were estimated.
Cite:
Sadykov V.A.
, Gubanova E.L.
, Sazonova N.N.
, Pokrovskaya S.A.
, Chumakova N.A.
, Mezentseva N.V.
, Bobin A.S.
, Gulyaev R.V.
, Ishchenko A.V.
, Krieger T.A.
, Mirodatos C.
Dry Reforming of Methane over Pt/PrCeZrO Catalyst: Kinetic and Mechanistic Features by Transient Studies and Their Modeling
Catalysis Today. 2011. V.171. N1. P.140-149. DOI: 10.1016/j.cattod.2011.04.004 WOS Scopus РИНЦ ANCAN OpenAlex
Dry Reforming of Methane over Pt/PrCeZrO Catalyst: Kinetic and Mechanistic Features by Transient Studies and Their Modeling
Catalysis Today. 2011. V.171. N1. P.140-149. DOI: 10.1016/j.cattod.2011.04.004 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Oct 31, 2010 |
| Accepted: | Apr 1, 2011 |
| Published online: | May 5, 2011 |
| Published print: | Aug 1, 2011 |
Identifiers:
| Web of science: | WOS:000293276700018 |
| Scopus: | 2-s2.0-79961032753 |
| Elibrary: | 24939954 |
| Chemical Abstracts: | 2011:963233 |
| Chemical Abstracts (print): | 155:245562 |
| OpenAlex: | W1998782168 |