Screening of TiO2-supported catalysts for selective NOx reduction with ammonia
Artikel i vetenskaplig tidskrift, 2004

In the present study, the catalytic activities of several TiO2-supported metal and metal oxide catalysts have been tested simultaneously for the selective catalytic redn. of nitrogen oxides with ammonia (NH3-SCR) using high-throughput-screening equipment. Two different series of various catalyst samples were evaluated for different feed gas compns., both with and without water, and before and after SO2 exposure. The first series of samples consisted of catalysts contg. a single metal or metal oxide (Mg, V, Cr, Mn, Fe, Co, Ni, Cu, Mo, Rh, Ag, W, Ir, or Pt), including a com. SCR catalyst sample for comparison. Of the metals investigated in the first series, Cr, Mn, Fe, and Rh were found to have the most interesting catalytic properties, regarding activity and selectivity at high or low temps. A second series of samples were prepd. contg. combinations of the selected metals, and the results from the catalytic tests show a general trend of increased SCR activity at lower temps. when Rh is added to the multiple-metal samples. The results further indicate that it is possible to widen the active temp. window by combining different metals in the catalyst formulation.

TITANIA

CHROMIA

NH3

NITRIC-OXIDE

LOW-TEMPERATURE

KINETICS

CLAY

SCR

Författare

Mikaela Wallin

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Kompetenscentrum katalys (KCK)

Stefan Forser

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Kompetenscentrum katalys (KCK)

Peter Thormählen

Chalmers, Teknisk fysik, Kemisk fysik

Kompetenscentrum katalys (KCK)

Magnus Skoglundh

Kompetenscentrum katalys (KCK)

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Industrial & Engineering Chemistry Research

0888-5885 (ISSN) 1520-5045 (eISSN)

Vol. 43 7723-7731

Drivkrafter

Hållbar utveckling

Styrkeområden

Nanovetenskap och nanoteknik

Transport

Energi

Materialvetenskap

Ämneskategorier

Kemiteknik

Miljövetenskap

DOI

10.1021/ie049695t