Investigation on the effect of ammonia distribution on selective catalytic reduction conversion efficiency

Xinna Tian, Wenping Zhang, Youhong Xiao, Peilin Zhou

Research output: Contribution to journalArticle

2 Citations (Scopus)
38 Downloads (Pure)

Abstract

The effect of ammonia distribution upstream selective catalytic reduction converter on selective catalytic reduction conversion efficiency has been studied in this paper. The results indicate that the more uniform ammonia concentration distribution upstream converter is, the higher NO<sub>x</sub> reduction rate and lower NH<sub>3</sub> slip can be achieved. By using static mixers fixed in the pipeline upstream converter, ammonia and exhaust streams can be mixed effectively on the limitation of mixing distance for marine selective catalytic reduction system. Different kinds of static mixers could lead to different degree of mixing between ammonia and exhaust streams, which will affect selective catalytic reduction conversion efficiency directly. Then comparing with the complete mixing degrees of ammonia and exhaust streams, selective catalytic reduction conversion efficiency can be used as an evaluation index for static mixers. Based on CFD method, the effect of mixing degrees of different static mixers on selective catalytic reduction conversion efficiency can be obtained by simulating current commercial catalysts with several different kinds of static mixers such as GK mixer, SK mixer, contour mixer, star-shaped mixer. The trend of NO<sub>x</sub> reduction rate and NH<sub>x</sub> slip changing with ammonia distribution and velocity distribution before selective catalytic reduction catalyst layers can be summarized by analyzing the simulating data. The results can be used to help engineering applications.
Original languageEnglish
Pages (from-to)5889-5893
Number of pages6
JournalAsian Journal of Chemistry
Volume24
Issue number12
Publication statusPublished - 31 Dec 2012

Fingerprint

Selective catalytic reduction
Ammonia
Conversion efficiency
Catalysts
Velocity distribution
Stars
Computational fluid dynamics
Pipelines

Keywords

  • ammonia distribution
  • selective catalytic reduction

Cite this

@article{4d27e94a35234ae2908cff6aab27c919,
title = "Investigation on the effect of ammonia distribution on selective catalytic reduction conversion efficiency",
abstract = "The effect of ammonia distribution upstream selective catalytic reduction converter on selective catalytic reduction conversion efficiency has been studied in this paper. The results indicate that the more uniform ammonia concentration distribution upstream converter is, the higher NOx reduction rate and lower NH3 slip can be achieved. By using static mixers fixed in the pipeline upstream converter, ammonia and exhaust streams can be mixed effectively on the limitation of mixing distance for marine selective catalytic reduction system. Different kinds of static mixers could lead to different degree of mixing between ammonia and exhaust streams, which will affect selective catalytic reduction conversion efficiency directly. Then comparing with the complete mixing degrees of ammonia and exhaust streams, selective catalytic reduction conversion efficiency can be used as an evaluation index for static mixers. Based on CFD method, the effect of mixing degrees of different static mixers on selective catalytic reduction conversion efficiency can be obtained by simulating current commercial catalysts with several different kinds of static mixers such as GK mixer, SK mixer, contour mixer, star-shaped mixer. The trend of NOx reduction rate and NHx slip changing with ammonia distribution and velocity distribution before selective catalytic reduction catalyst layers can be summarized by analyzing the simulating data. The results can be used to help engineering applications.",
keywords = "ammonia distribution, selective catalytic reduction",
author = "Xinna Tian and Wenping Zhang and Youhong Xiao and Peilin Zhou",
year = "2012",
month = "12",
day = "31",
language = "English",
volume = "24",
pages = "5889--5893",
journal = "Asian Journal of Chemistry",
issn = "0970-7077",
publisher = "Chemical Publishing Co.",
number = "12",

}

Investigation on the effect of ammonia distribution on selective catalytic reduction conversion efficiency. / Tian, Xinna; Zhang, Wenping; Xiao, Youhong; Zhou, Peilin.

In: Asian Journal of Chemistry, Vol. 24, No. 12, 31.12.2012, p. 5889-5893.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Investigation on the effect of ammonia distribution on selective catalytic reduction conversion efficiency

AU - Tian, Xinna

AU - Zhang, Wenping

AU - Xiao, Youhong

AU - Zhou, Peilin

PY - 2012/12/31

Y1 - 2012/12/31

N2 - The effect of ammonia distribution upstream selective catalytic reduction converter on selective catalytic reduction conversion efficiency has been studied in this paper. The results indicate that the more uniform ammonia concentration distribution upstream converter is, the higher NOx reduction rate and lower NH3 slip can be achieved. By using static mixers fixed in the pipeline upstream converter, ammonia and exhaust streams can be mixed effectively on the limitation of mixing distance for marine selective catalytic reduction system. Different kinds of static mixers could lead to different degree of mixing between ammonia and exhaust streams, which will affect selective catalytic reduction conversion efficiency directly. Then comparing with the complete mixing degrees of ammonia and exhaust streams, selective catalytic reduction conversion efficiency can be used as an evaluation index for static mixers. Based on CFD method, the effect of mixing degrees of different static mixers on selective catalytic reduction conversion efficiency can be obtained by simulating current commercial catalysts with several different kinds of static mixers such as GK mixer, SK mixer, contour mixer, star-shaped mixer. The trend of NOx reduction rate and NHx slip changing with ammonia distribution and velocity distribution before selective catalytic reduction catalyst layers can be summarized by analyzing the simulating data. The results can be used to help engineering applications.

AB - The effect of ammonia distribution upstream selective catalytic reduction converter on selective catalytic reduction conversion efficiency has been studied in this paper. The results indicate that the more uniform ammonia concentration distribution upstream converter is, the higher NOx reduction rate and lower NH3 slip can be achieved. By using static mixers fixed in the pipeline upstream converter, ammonia and exhaust streams can be mixed effectively on the limitation of mixing distance for marine selective catalytic reduction system. Different kinds of static mixers could lead to different degree of mixing between ammonia and exhaust streams, which will affect selective catalytic reduction conversion efficiency directly. Then comparing with the complete mixing degrees of ammonia and exhaust streams, selective catalytic reduction conversion efficiency can be used as an evaluation index for static mixers. Based on CFD method, the effect of mixing degrees of different static mixers on selective catalytic reduction conversion efficiency can be obtained by simulating current commercial catalysts with several different kinds of static mixers such as GK mixer, SK mixer, contour mixer, star-shaped mixer. The trend of NOx reduction rate and NHx slip changing with ammonia distribution and velocity distribution before selective catalytic reduction catalyst layers can be summarized by analyzing the simulating data. The results can be used to help engineering applications.

KW - ammonia distribution

KW - selective catalytic reduction

UR - http://www.asianjournalofchemistry.co.in/user/journal/viewarticle.aspx?ArticleID=24_12_129

M3 - Article

VL - 24

SP - 5889

EP - 5893

JO - Asian Journal of Chemistry

JF - Asian Journal of Chemistry

SN - 0970-7077

IS - 12

ER -