Modelling of urea gas phase thermolysis and theoretical details on urea evaporation
Artikel i vetenskaplig tidskrift, 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

thermolysis

urea

modelling

Författare

Andreas Lundström

Chalmers, Kemi- och bioteknik, Kemisk reaktionsteknik

Björn Waldheim

Scania CV AB

Henrik Ström

Kompetenscentrum katalys

Chalmers, Kemi- och bioteknik, Kemisk reaktionsteknik

Björn Westerberg

Chalmers, Kemi- och bioteknik, Kemisk reaktionsteknik

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

0954-4070 (ISSN) 2041-2991 (eISSN)

Vol. 225 10 1392-1398

Drivkrafter

Hållbar utveckling

Ämneskategorier

Kemiska processer

Kemiteknik

DOI

10.1177/0954407011406048

Mer information

Senast uppdaterat

2019-11-29