Deactivation of a Vanadium-Based SCR Catalyst Used in a Biogas-Powered Euro VI Heavy-Duty Engine Installation
Artikel i vetenskaplig tidskrift, 2020

We have investigated how the exhaust gases from a heavy-duty Euro VI engine, powered with biogas impact a vanadium-based selective catalytic reduction (SCR) catalyst in terms of performance. A full Euro VI emission control system was used and the accumulation of catalyst poisons from the combustion was investigated for the up-stream particulate filter as well as the SCR catalyst. The NO(x)reduction performance in terms of standard, fast and NO2-rich SCR was evaluated before and after exposure to exhaust from a biogas-powered engine for 900 h. The SCR catalyst retains a significant part of its activity towards NO(x)reduction after exposure to biogas exhaust, likely due to capture of catalyst poisons on the up-stream components where the deactivation of the oxidation catalyst is especially profound. At lower temperatures some deactivation of the first part of the SCR catalyst was observed which could be explained by a considerably higher surface V4+/V(5+)ratio for this sample compared to the other samples. The higher value indicates that the reoxidation of V(4+)to V(5+)is partially hindered, blocking the redox cycle for parts of the active sites.

V2O5-WO3/TiO2

methane

biogas

engine-bench

catalyst deactivation

NH3-SCR

Författare

Johanna Englund

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Polymerteknologi

Sandra Dahlin

Kungliga Tekniska Högskolan (KTH)

Andreas Schaefer

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Kunpeng Xie

Volvo Group

Lennart Andersson

Volvo Group

Soran Shwan

Volvo Group

Per-Anders Carlsson

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Per-Anders Carlsson Group

Lars J. Pettersson

Kungliga Tekniska Högskolan (KTH)

Magnus Skoglundh

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Polymerteknologi

Catalysts

2073-4344 (ISSN)

Vol. 10 5 552

Ämneskategorier

Kemiska processer

Annan kemiteknik

Annan elektroteknik och elektronik

DOI

10.3390/catal10050552

Mer information

Senast uppdaterat

2020-09-02