Effects of gaseous compositions the on simultaneous removal of NOx and SO2 from simulated flue gas by ammonia absorption

Hong Wang; Tian Le Zhu; Mei Yan Wang

Effects of gaseous compositions the on simultaneous removal of NO_x and SO₂ from simulated flue gas by ammonia absorption

Hong Wang
, Tian Le Zhu^*
, Mei Yan Wang

^*Corresponding author for this work

School of Materials Science and Engineering

Beihang University

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

The effects of NO_x oxidation ratio, O₂ and SO₂ concentrations in simulated flue gas as well as addition of S(IV) oxidation inhibitor NaS₂O₃ on the simultaneous removal of SO₂ and NO_x by ammonia absorption were investigated under the conditions of pH 5.9- 6.1 and aqueous S(IV) concentration ≥1.0 mol·L^-1. The research results showed that NO₂ could be effectively absorbed by ammonium sulfite, but the NO absorption was negligible. Therefore, NO oxidation is the premise of NO_x removal. Aqueous S(IV) concentration is a key factor affecting NO₂ absorption removal, the higher the O₂ concentration or the lower the SO₂ concentration, the faster the aaqueous S(IV) concentration decreased, which resulted in a faster decrease of NO₂ removal efficiency. S(IV) oxidation was inhibited to some extent by the addition of oxidation inhibitor S₂O₃^2- into the absorption solution. As a result, the decrease of NO₂ removal efficiency became slower.

Original language	English
Pages (from-to)	21-26
Number of pages	6
Journal	Huanjing Kexue/Environmental Science
Volume	34
Issue number	1
State	Published - Jan 2013

Keywords

Absorption
Ammonium sulfite
Flue gas
Gaseous composition
NO
Oxidation inhibitor
SO

Cite this

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title = "Effects of gaseous compositions the on simultaneous removal of NOx and SO2 from simulated flue gas by ammonia absorption",

abstract = "The effects of NOx oxidation ratio, O2 and SO2 concentrations in simulated flue gas as well as addition of S(IV) oxidation inhibitor NaS2O3 on the simultaneous removal of SO2 and NOx by ammonia absorption were investigated under the conditions of pH 5.9- 6.1 and aqueous S(IV) concentration ≥1.0 mol·L-1. The research results showed that NO2 could be effectively absorbed by ammonium sulfite, but the NO absorption was negligible. Therefore, NO oxidation is the premise of NOx removal. Aqueous S(IV) concentration is a key factor affecting NO2 absorption removal, the higher the O2 concentration or the lower the SO2 concentration, the faster the aaqueous S(IV) concentration decreased, which resulted in a faster decrease of NO2 removal efficiency. S(IV) oxidation was inhibited to some extent by the addition of oxidation inhibitor S2O32- into the absorption solution. As a result, the decrease of NO2 removal efficiency became slower.",

keywords = "Absorption, Ammonium sulfite, Flue gas, Gaseous composition, NO, Oxidation inhibitor, SO",

author = "Hong Wang and Zhu, \{Tian Le\} and Wang, \{Mei Yan\}",

year = "2013",

month = jan,

language = "英语",

volume = "34",

pages = "21--26",

journal = "Huanjing Kexue/Environmental Science",

issn = "0250-3301",

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number = "1",

}

TY - JOUR

T1 - Effects of gaseous compositions the on simultaneous removal of NOx and SO2 from simulated flue gas by ammonia absorption

AU - Wang, Hong

AU - Zhu, Tian Le

AU - Wang, Mei Yan

PY - 2013/1

Y1 - 2013/1

N2 - The effects of NOx oxidation ratio, O2 and SO2 concentrations in simulated flue gas as well as addition of S(IV) oxidation inhibitor NaS2O3 on the simultaneous removal of SO2 and NOx by ammonia absorption were investigated under the conditions of pH 5.9- 6.1 and aqueous S(IV) concentration ≥1.0 mol·L-1. The research results showed that NO2 could be effectively absorbed by ammonium sulfite, but the NO absorption was negligible. Therefore, NO oxidation is the premise of NOx removal. Aqueous S(IV) concentration is a key factor affecting NO2 absorption removal, the higher the O2 concentration or the lower the SO2 concentration, the faster the aaqueous S(IV) concentration decreased, which resulted in a faster decrease of NO2 removal efficiency. S(IV) oxidation was inhibited to some extent by the addition of oxidation inhibitor S2O32- into the absorption solution. As a result, the decrease of NO2 removal efficiency became slower.

AB - The effects of NOx oxidation ratio, O2 and SO2 concentrations in simulated flue gas as well as addition of S(IV) oxidation inhibitor NaS2O3 on the simultaneous removal of SO2 and NOx by ammonia absorption were investigated under the conditions of pH 5.9- 6.1 and aqueous S(IV) concentration ≥1.0 mol·L-1. The research results showed that NO2 could be effectively absorbed by ammonium sulfite, but the NO absorption was negligible. Therefore, NO oxidation is the premise of NOx removal. Aqueous S(IV) concentration is a key factor affecting NO2 absorption removal, the higher the O2 concentration or the lower the SO2 concentration, the faster the aaqueous S(IV) concentration decreased, which resulted in a faster decrease of NO2 removal efficiency. S(IV) oxidation was inhibited to some extent by the addition of oxidation inhibitor S2O32- into the absorption solution. As a result, the decrease of NO2 removal efficiency became slower.

KW - Absorption

KW - Ammonium sulfite

KW - Flue gas

KW - Gaseous composition

KW - NO

KW - Oxidation inhibitor

KW - SO

UR - https://www.scopus.com/pages/publications/84873171546

M3 - 文章

C2 - 23487913

AN - SCOPUS:84873171546

SN - 0250-3301

VL - 34

SP - 21

EP - 26

JO - Huanjing Kexue/Environmental Science

JF - Huanjing Kexue/Environmental Science

IS - 1

ER -

Effects of gaseous compositions the on simultaneous removal of NO_x and SO₂ from simulated flue gas by ammonia absorption

Abstract

Keywords

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