Deposit Formation in Urea-SCR Systems

Event
SAE 2009 Powertrains Fuels and Lubricants Meeting
Authors Abstract
Content
Formation of urea injection related deposits in a heavy-duty urea-SCR system was studied using an engine lab setup. The exhaust system was instrumented with thermocouples to track temperature changes caused by the liquid spray. Impact of operating parameters (exhaust and ambient temperature, urea solution injection rate) and system design modification (insulation, wiremesh insert) on the temperature profiles and deposit quantities was studied.
Deposits were found in all tests conducted under typical exhaust temperatures. Deposition rate increased with lower exhaust and ambient temperature, and with higher injection rate. Mixer insulation and wiremesh upstream of the mixer reduced the deposits.
Meta TagsDetails
DOI
https://doi.org/10.4271/2009-01-2780
Pages
7
Citation
Strots, V., Santhanam, S., Adelman, B., Griffin, G. et al., "Deposit Formation in Urea-SCR Systems," SAE Int. J. Fuels Lubr. 2(2):283-289, 2010, https://doi.org/10.4271/2009-01-2780.
Additional Details
Publisher
Published
Nov 2, 2009
Product Code
2009-01-2780
Content Type
Journal Article
Language
English