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, Applied Surface Chemistry

Competence Centre for Catalysis (KCK)

Magnus Skoglundh

Competence Centre for Catalysis (KCK)

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Applied Surface Chemistry

Pär Gabrielsson

Haldor Topsoe

Per-Anders Carlsson

Competence Centre for Catalysis (KCK)

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Applied Surface Chemistry

Topics in Catalysis

1022-5528 (ISSN) 1572-9028 (eISSN)

Vol. 59 10-12 970-975

Competence Centre for Catalysis

Volvo Group, 2014-01-01 -- 2017-12-31.

Haldor Topsoe, 2014-01-01 -- 2017-12-31.

Chalmers, 2014-01-01 -- 2017-12-31.

ECAPS AB, 2014-01-01 -- 2017-12-31.

Scania CV AB, 2014-01-01 -- 2017-12-31.

Volvo Cars, 2014-01-01 -- 2017-12-31.

Wärtsilä Finland, 2014-01-01 -- 2017-12-31.

Swedish Energy Agency, 2014-01-01 -- 2017-12-31.

High efficient Otto engine with diluted combustion II

Swedish Energy Agency, 2015-01-01 -- 2017-12-31.

Driving Forces

Sustainable development

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Transport

Energy

Materials Science

Subject Categories

Chemical Process Engineering

Atom and Molecular Physics and Optics

Materials Chemistry

DOI

10.1007/s11244-016-0576-0

More information

Latest update

10/27/2018