Passive SCR: The effect of H2 to NO ratio on the formation of NH3 over alumina supported platinum and palladium catalysts
Journal article, 2016
We investigate the relationship between the H2:NO ratio and NH3 formation over alumina supported Pt and Pd catalysts. By kinetic studies and in situ infrared spectroscopy, we report that NH3 formation is not only sensitive to the catalyst formulation but equally dependent on the feed gas composition and tem- perature. Specifically, we identify that hydrogen plays an important role in the dissociation of NO at low tem- perature. We also show that the support material itself plays a vital role in the ammonia formation mechanism due to the redox behaviour of NO adsorption at low temperature. This was unexpected as the noble metal is generally considered to be the active phase for the reaction of NO and H2.
Author
Emma Adams
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Competence Centre for Catalysis (KCK)
Magnus Skoglundh
Competence Centre for Catalysis (KCK)
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Pär Gabrielsson
Haldor Topsoe
Per-Anders Carlsson
Competence Centre for Catalysis (KCK)
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Topics in Catalysis
1022-5528 (ISSN) 1572-9028 (eISSN)
Vol. 59 10-12 970-975Competence Centre for Catalysis
Swedish Energy Agency (22490-3), 2014-01-01 -- 2017-12-31.
Volvo Cars, 2014-01-01 -- 2017-12-31.
Haldor Topsoe, 2014-01-01 -- 2017-12-31.
ECAPS AB, 2014-01-01 -- 2017-12-31.
Wärtsilä Finland, 2014-01-01 -- 2017-12-31.
Chalmers, 2014-01-01 -- 2017-12-31.
Scania AB, 2014-01-01 -- 2017-12-31.
Volvo Group, 2014-01-01 -- 2017-12-31.
High efficient Otto engine with diluted combustion II
Swedish Energy Agency (35561-2), 2015-01-01 -- 2017-12-31.
Driving Forces
Sustainable development
Areas of Advance
Nanoscience and Nanotechnology
Transport
Energy
Materials Science
Subject Categories (SSIF 2011)
Chemical Process Engineering
Atom and Molecular Physics and Optics
Materials Chemistry
DOI
10.1007/s11244-016-0576-0