ARS | Publication request: Evaluation of Secondary Aerosol Formation from Primary Amines and Implications to Selective Catalytic Reduction

Submitted to: Transportation Research Board
Publication Type: Proceedings
Publication Acceptance Date: October 28, 2009
Publication Date: January 12, 2010
Citation: Malloy, Q.G., Qi, L., Warren, B., Cocker, Iii, D.R., Erupe, M.E., Silva, P.J. 2010. Evaluation of Secondary Aerosol Formation from Primary Amines and Implications to Selective Catalytic Reduction. Transportation Research Board.

Technical Abstract: With the mandated reduction of NOx, advanced emission control technologies are being implemented. One strategy is the adaptation of selective catalytic reduction units with urea as a focus. However, urea suffers from issues such as stability at elevated temperatures and the tendency to form deposits in exhaust gas streams. Compounds with amine functional groups have been proposed as reductants. Amines can be degraded to ammonia, eliminating the need for expensive catalyst. Here we present data from experiments focused on the fate of primary amines in the atmosphere. Ultrafine particles are formed with mass based yields raging from <2% for methylamine to greater than 44% for ethylamine and butylamine.