High-Temperature Water Ggas Shift Catalyst Based on Nanodisperse, Metastable, Partially Hydrated Iron Oxide—Two-Line Ferrihydrite Full article
| Journal |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Output data | Year: 2012, Volume: 53, Number: 4, Pages: 504-510 Pages count : 7 DOI: 10.1134/S0023158412040064 | ||||
| Tags | Hydrate Iron Oxide; Distorted Octahedral Environment; Atomic Radial Distribution Function; Iron Active Site; Line Ferrihydrite | ||||
| Authors |
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| Affiliations |
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Funding (6)
| 1 | Russian Foundation for Basic Research | 12-03-01039 (01201258422) |
| 2 | Russian Foundation for Basic Research | 12-03-01154 |
| 3 | The Ministry of Education and Science of the Russian Federation | 16.518.11.7019 |
| 4 | Президиум РАН | 7.14 |
| 5 | Президиум РАН | 24.12 |
| 6 | Council for Grants of the President of the Russian Federation | НШ-3156.2010.3 |
Abstract:
Two line ferrihydrite (2L FH) is a metastable, heavily disordered, partially hydrated Fe(III) oxide. The catalyst prepared by heat treatment of 2L FH promoted with chromium ions (~9 at %) and copper ions (4–7 at %) is much more active in the water gas shift (WGS) reaction at low temperatures (<350°C) than the conventional Fe -containing catalysts. According to XAFS spectroscopy data, the copper cations in 2L FH are in the Cu2+ state and are in a tetragonally distorted octahedral environment, while under the WGS conditions at <350°C, copper is in the reduced state, specifically, in the form of ultrafine (<2 nm) Cu0 particles. It is due to these particles that the catalyst is very active below 350°C. Above 400°C, the Cu0 parti cles are deactivated under the reaction conditions and the catalytic activity is only due to iron active sites, whose number is proportional to the specific surface area of the catalyst. The specific activity of the catalyst at these temperatures is close to the activity of the conventional (hematite based) WGS catalysts. The high activity of the 2L FH based catalyst at <350°C makes it possible to reduce the starting temperature of the adiabatic high temperature WGS reactor.
Cite:
Minyukova T.P.
, Khassin A.A.
, Baronskaya N.A.
, Plyasova L.M.
, Kriventsov V.V.
, Rozhko E.S.
, Filonenko G.A.
, Yurieva T.M.
High-Temperature Water Ggas Shift Catalyst Based on Nanodisperse, Metastable, Partially Hydrated Iron Oxide—Two-Line Ferrihydrite
Kinetics and Catalysis. 2012. V.53. N4. P.504-510. DOI: 10.1134/S0023158412040064 WOS Scopus РИНЦ ANCAN OpenAlex
High-Temperature Water Ggas Shift Catalyst Based on Nanodisperse, Metastable, Partially Hydrated Iron Oxide—Two-Line Ferrihydrite
Kinetics and Catalysis. 2012. V.53. N4. P.504-510. DOI: 10.1134/S0023158412040064 WOS Scopus РИНЦ ANCAN OpenAlex
Original:
Минюкова Т.П.
, Хасин А.А.
, Баронская Н.А.
, Плясова Л.М.
, Кривенцов В.В.
, Рожко Е.С.
, Филоненко Г.А.
, Юрьева Т.М.
Катализатор на основе нанодисперсного метастабильного частично гидратированного оксида железа – двухполосного ферригидрита для процесса среднетемпературной паровой конверсии СО
Кинетика и катализ. 2012. Т.53. №4. С.527-533. РИНЦ
Катализатор на основе нанодисперсного метастабильного частично гидратированного оксида железа – двухполосного ферригидрита для процесса среднетемпературной паровой конверсии СО
Кинетика и катализ. 2012. Т.53. №4. С.527-533. РИНЦ
Dates:
| Submitted: | Nov 30, 2011 |
| Published print: | Jul 1, 2012 |
| Published online: | Jul 26, 2012 |
Identifiers:
| Web of science: | WOS:000306798100012 |
| Scopus: | 2-s2.0-84865605975 |
| Elibrary: | 20472982 |
| Chemical Abstracts: | 2012:1083985 |
| Chemical Abstracts (print): | 157:559526 |
| OpenAlex: | W2000794352 |