Search: onr:"swepub:oai:research.chalmers.se:47660d40-ee91-42a9-b4dd-0a0b9b0ae5f7" >
Ammonia formation f...
Ammonia formation from nitric oxide over Pd-based catalysts in multicomponent feed gas compositions
-
- Adams, Emma, 1989 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
-
- Skoglundh, Magnus, 1965 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
-
- Carlsson, Per-Anders, 1972 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
-
(creator_code:org_t)
- Elsevier BV, 2017
- 2017
- English.
-
In: Catalysis Communications. - : Elsevier BV. - 1566-7367. ; 95, s. 26-30
- Related links:
-
https://research.cha... (primary) (free)
-
show more...
-
https://research.cha...
-
https://doi.org/10.1...
-
https://research.cha...
-
show less...
Abstract
Subject headings
Close
- Using multicomponent gas feeds, the formation of ammonia from nitric oxide over Pd/Al2O3 and Pd/Ce/Al2O3 model catalysts was compared to that of a commercially-available three-way catalyst. Steady- state oxygen-sweep experiments show that the highest activity for ammonia formation is obtained over the Pd/Ce/Al2O3 catalyst whilst the lowest activity is observed for the three-way catalyst. The latter is consid- ered to be linked to the incorporation of rhodium, a component that promotes the NOx reduction selectivity towards N2. Also, lean/rich cycling experiments were carried out to simulate the cycling conditions that passive-SCR after treatment systems depend upon. High activity is again seen over the Pd/Ce/Al2O3 cata- lyst during short periodic switches. For the three-way catalyst, longer periodic switches are required for the onset of ammonia formation due to the high oxygen storage capacity of this sample as compared to the other two. Hence, a future direction of investigation could be to develop materials with equivalent water- gas shift properties of ceria, but with reduced oxygen storage capacity so as to provide hydrogen for reaction without incurring a significant delay in ammonia formation.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Kemiska processer (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Chemical Process Engineering (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Publication and Content Type
- art (subject category)
- ref (subject category)
Find in a library
To the university's database