Deactivation of a Vanadium-Based SCR Catalyst Used in a Biogas-Powered Euro VI Heavy-Duty Engine Installation
Journal article, 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

Author

Johanna Englund

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Sandra Dahlin

Royal Institute of Technology (KTH)

Andreas Schaefer

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Kunpeng Xie

Volvo Group

Lennart Andersson

Volvo Group

Soran Shwan

Volvo Group

Per-Anders Carlsson

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Per-Anders Carlsson Group

Lars J. Pettersson

Royal Institute of Technology (KTH)

Magnus Skoglundh

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Catalysts

2073-4344 (ISSN)

Vol. 10 5 552

Subject Categories

Chemical Process Engineering

Other Chemical Engineering

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.3390/catal10050552

More information

Latest update

9/2/2020 2