Modelling of urea gas phase thermolysis and theoretical details on urea evaporation
Journal article, 2011

A model study of droplet decomposition of a urea–water solution (UWS) for selective catalytic reduction applications (SCR) has been undertaken. A new vapour pressure equation for urea has been adopted to predict the rate of urea evaporation. The vapour pressure above liquid urea is obtained by extrapolating the vapour pressure above solid urea. Gas phase decomposition of urea into ammonia and isocyanic acid is further assumed to be fast, dictating the boundary conditions for the evaporation process. The rate of UWS evaporation is compared to recently published data and shows good agreement. A set of Antoine parameters was fitted to the derived vapour pressure to facilitate future simulations.

vaporization

modelling

thermolysis

urea

Author

Andreas Lundström

Chalmers, Chemical and Biological Engineering, Chemical Reaction Engineering

Björn Waldheim

Scania

Henrik Ström

Competence Centre for Catalysis (KCK)

Chalmers, Chemical and Biological Engineering, Chemical Reaction Engineering

Björn Westerberg

Chalmers, Chemical and Biological Engineering, Chemical Reaction Engineering

Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering

0954-4070 (ISSN)

Vol. 225 10 1392-1398

Driving Forces

Sustainable development

Subject Categories

Chemical Process Engineering

Chemical Engineering

DOI

10.1177/0954407011406048

More information

Latest update

5/24/2019