Details
| Original language | English |
|---|---|
| Pages (from-to) | 1190-1194 |
| Number of pages | 5 |
| Journal | CHEMCATCHEM |
| Volume | 6 |
| Issue number | 5 |
| Early online date | 7 May 2014 |
| Publication status | E-pub ahead of print - 7 May 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.
Keywords
- ammonia, membrane reactors, membranes, oxidation, oxygen activation
ASJC Scopus subject areas
- Chemical Engineering(all)
- Catalysis
- Chemistry(all)
- Physical and Theoretical Chemistry
- Chemistry(all)
- Organic Chemistry
- Chemistry(all)
- Inorganic Chemistry
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In: CHEMCATCHEM, Vol. 6, No. 5, 07.05.2014, p. 1190-1194.
Research output: Contribution to journal › Article › Research › 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 -