Journal
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
Volume 30, Issue 3, Pages 1443-1448Publisher
KOREAN SOC MECHANICAL ENGINEERS
DOI: 10.1007/s12206-016-0252-0
Keywords
Boiling-point elevation; Drop evaporation; Enthalpy of dissolution; Urea-SCR; Water vaporization
Categories
Funding
- SNU-IAMD
- Doosan Infracore
Ask authors/readers for more resources
Understanding of water vaporization is the first step to anticipate the conversion process of urea into ammonia in the exhaust stream. As aqueous urea is a mixture and the urea in the mixture acts as a non-volatile solute, its colligative properties should be considered during water vaporization. The elevation of boiling point for urea water solution is measured with respect to urea mole fraction. With the boiling-point elevation relation, a model for water vaporization is proposed underlining the correction of the heat of vaporization of water in the urea water mixture due to the enthalpy of urea dissolution in water. The model is verified by the experiments of water vaporization as well. Finally, the water vaporization model is applied to the water vaporization of aqueous urea droplets. It is shown that urea decomposition can begin before water evaporation finishes due to the boiling-point elevation.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available