Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 1190-1194 |
| Seitenumfang | 5 |
| Fachzeitschrift | CHEMCATCHEM |
| Jahrgang | 6 |
| Ausgabenummer | 5 |
| Frühes Online-Datum | 7 Mai 2014 |
| Publikationsstatus | Elektronisch veröffentlicht (E-Pub) - 7 Mai 2014 |
Abstract
Upon using a reactant/oxygen mixture as co-feed in partial oxidation, adsorbed surface molecular oxygen species can cause low selectivity. We propose a concept different from the conventional co-feed partial oxidation process in packed-bed reactors. In this new configuration, the activation of oxygen is separated from the catalytic oxidation by using an oxygen-permeable membrane to suppress the formation of nonselective surface molecular oxygen species. A continuous flux of lattice oxygen through the membrane allows highly selective partial oxidation. In the oxidation of ammonia to NO, the NO selectivity was improved from 77 to 95 % if a La0.6Sr0.4Co 0.2Fe0.8O3-δ oxygen-permeable catalytically active membrane was used at 850 °C instead of a co-feed fixed bed reactor. Got to get some activated oxygen through: By using an oxygen-permeable membrane, the activation of oxygen is separated from the catalytic oxidation, which suppresses the formation of nonselective surface molecular oxygen species that can cause low selectivity. A continuous flux of lattice oxygen through the membrane allows highly selective partial oxidation. As a result, the selectivity for NO in the oxidation of ammonia is improved.
ASJC Scopus Sachgebiete
- Chemische Verfahrenstechnik (insg.)
- Katalyse
- Chemie (insg.)
- Physikalische und Theoretische Chemie
- Chemie (insg.)
- Organische Chemie
- Chemie (insg.)
- Anorganische Chemie
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in: CHEMCATCHEM, Jahrgang 6, Nr. 5, 07.05.2014, S. 1190-1194.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - An efficient oxygen activation route for improved ammonia oxidation through an oxygen-permeable catalytic membrane
AU - Cao, Zhengwen
AU - Jiang, Heqing
AU - Luo, Huixia
AU - Baumann, Stefan
AU - Meulenberg, Wilhelm A.
AU - Voss, Hartwig
AU - Caro, Jürgen
PY - 2014/5/7
Y1 - 2014/5/7
N2 - Upon using a reactant/oxygen mixture as co-feed in partial oxidation, adsorbed surface molecular oxygen species can cause low selectivity. We propose a concept different from the conventional co-feed partial oxidation process in packed-bed reactors. In this new configuration, the activation of oxygen is separated from the catalytic oxidation by using an oxygen-permeable membrane to suppress the formation of nonselective surface molecular oxygen species. A continuous flux of lattice oxygen through the membrane allows highly selective partial oxidation. In the oxidation of ammonia to NO, the NO selectivity was improved from 77 to 95 % if a La0.6Sr0.4Co 0.2Fe0.8O3-δ oxygen-permeable catalytically active membrane was used at 850 °C instead of a co-feed fixed bed reactor. Got to get some activated oxygen through: By using an oxygen-permeable membrane, the activation of oxygen is separated from the catalytic oxidation, which suppresses the formation of nonselective surface molecular oxygen species that can cause low selectivity. A continuous flux of lattice oxygen through the membrane allows highly selective partial oxidation. As a result, the selectivity for NO in the oxidation of ammonia is improved.
AB - Upon using a reactant/oxygen mixture as co-feed in partial oxidation, adsorbed surface molecular oxygen species can cause low selectivity. We propose a concept different from the conventional co-feed partial oxidation process in packed-bed reactors. In this new configuration, the activation of oxygen is separated from the catalytic oxidation by using an oxygen-permeable membrane to suppress the formation of nonselective surface molecular oxygen species. A continuous flux of lattice oxygen through the membrane allows highly selective partial oxidation. In the oxidation of ammonia to NO, the NO selectivity was improved from 77 to 95 % if a La0.6Sr0.4Co 0.2Fe0.8O3-δ oxygen-permeable catalytically active membrane was used at 850 °C instead of a co-feed fixed bed reactor. Got to get some activated oxygen through: By using an oxygen-permeable membrane, the activation of oxygen is separated from the catalytic oxidation, which suppresses the formation of nonselective surface molecular oxygen species that can cause low selectivity. A continuous flux of lattice oxygen through the membrane allows highly selective partial oxidation. As a result, the selectivity for NO in the oxidation of ammonia is improved.
KW - ammonia
KW - membrane reactors
KW - membranes
KW - oxidation
KW - oxygen activation
UR - http://www.scopus.com/inward/record.url?scp=84900326245&partnerID=8YFLogxK
U2 - 10.1002/cctc.201400048
DO - 10.1002/cctc.201400048
M3 - Article
AN - SCOPUS:84900326245
VL - 6
SP - 1190
EP - 1194
JO - CHEMCATCHEM
JF - CHEMCATCHEM
SN - 1867-3880
IS - 5
ER -