Selective catalytic reduction of NOx over H-ZSM-5 under lean conditions using transient NH3 supply
Artikel i vetenskaplig tidskrift, 2004

The selective catalytic reduction (SCR) of NO x over zeolite H-ZSM-5 with ammonia was investigated using in situ FTIR spectroscopy and flow reactor measurements. The adsorption of ammonia and the reaction between NO x , O2 and either pre-adsorbed ammonia or transiently supplied ammonia were investigated for either NO or equimolar amounts of NO and NO2. With transient ammonia supply the total NO reduction increased and the selectivity to N2O formation decreased compared to continuous supply. The FTIR experiments revealed that NO x reacts with ammonia adsorbed on Brønsted acid sites as NH4 + ions. These experiments further indicated that adsorbed -NO2 – is formed during the SCR reaction over H-ZSM-5.

selective catalytic reduction of NOx

in situ FTIR

H-ZSM-5

NH3-SCR

ammonia transients

Författare

Mikaela Wallin

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Kompetenscentrum katalys

Carl-Johan Karlsson

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Kompetenscentrum katalys

Anders Palmqvist

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Kompetenscentrum katalys

Magnus Skoglundh

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Kompetenscentrum katalys

Topics in Catalysis

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

Vol. 30/31 1-4 107-113

Drivkrafter

Hållbar utveckling

Styrkeområden

Nanovetenskap och nanoteknik

Transport

Energi

Materialvetenskap

Ämneskategorier

Kemiska processer

Kemiteknik

Miljövetenskap

DOI

10.1023/B:TOCA.0000029737.89510.22

Mer information

Senast uppdaterat

2023-09-08