Concept of vaporized urea dosing in selective catalytic reduction
Authors:
- Rafał Sala,
- Piotr Bielaczyc,
- Marek Brzeżański
Abstract
This work tried to identify the influence of dosing vaporized urea solution in a selective catalytic reduction (SCR) system. In the SCR method, optimising the urea evaporation and mixing properties can significantly improve the NOx conversion efficiency in the catalyst. It can also exert a positive effect on the uniformity of NH3 concentration distribution across the catalyst face. The concept of an electrically evaporated urea-dosing system was investigated and it was found that urea pre-heating prior to introduction into the exhaust gas is favourable for enhancing NOx removal under steady-state and transient engine operation. In the urea evaporating system the heating chamber was of a cylindrical tube shape and the urea vapour was introduced into the exhaust by means of a Venturi orifice. The concept urea dosing was only a custom-made solution, but proved to be superior to the regular dosing system operating in the liquid phase. The research concers mechanical systems for reducing nitrogen oxide in combustion engine. Chemical reactions are the product of these mechanical systems. The article concerns only the scientific discipline of Mechanical Engineering.
- Record ID
- CUT50c54e4931494685965cf949a9c5c304
- Publication categories
- ;
- Author
- Journal series
- Catalysts, ISSN , e-ISSN 2073-4344, Monthly
- Issue year
- 2017
- Vol
- 7
- No
- 10
- Pages
- [1-10]
- Other elements of collation
- fot.; schem.; tab.; wykr.; Bibliografia (na s.) - 9-10; Bibliografia (liczba pozycji) - 25; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 7, Iss. 10
- Keywords in English
- urea, vapor, ammonia, nitrogen oxides, catalitic reduction, combustion engine
- DOI
- DOI:10.3390/catal7100307 Opening in a new tab
- URL
- http://www.mdpi.com/2073-4344/7/10/307 Opening in a new tab
- Language
- eng (en) English
- License
- Score (nominal)
- 30
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT50c54e4931494685965cf949a9c5c304/
- URN
urn:pkr-prod:CUT50c54e4931494685965cf949a9c5c304
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.