Enhancement Mechanism of SO2 on NO2 Removal by Calcium Hydroxide at Low Temperature

Author

Gao, Jihui

Author_Institution

Sch. of Energy Sci. & Technol., Harbin Inst. of Technol., Harbin, China

fYear

2011

fDate

19-20 Feb. 2011

Firstpage

2077

Lastpage

2081

Abstract

Oxidizing NO to more soluble NO₂ has been proposed as a promising method for enhancing NO removal in conventional FGD processes. In this paper, the roles of gas components (O₂, H₂O) and reaction temperature in NO₂ removal were discussed by comparing the NO₂ absorption characteristics in and without the presence of SO₂. It was found that the presence of SO₂ in the flue gas could enhance NO₂ removal. The effects of O₂, H₂O and reaction temperature had a high dependence on the presence of SO₂. Without the presence of SO₂, H₂O and O₂ concentration had negligible influence on NO₂ removal, while higher reaction temperature could accelerate NO₂ absorption. However, reaction temperature did not affect NO₂ removal in the presence of SO₂, and NO₂ removal increased with increasing relative humidity but decrease with O₂ concentration increasing.

Keywords

absorption; air pollution; calcium compounds; flue gas desulphurisation; humidity; nitrogen compounds; sulphur compounds; FGD processes; NO₂; SO₂; absorption characteristics; calcium hydroxide; enhancement mechanism; flue gas; gas components; nitrogen dioxide removal; reaction temperature; relative humidity; sulfur dioxide removal; Absorption; Calcium; Humidity; Inductors; Nitrogen; Water; X-ray scattering; NO2 removal; SO2; flue gas components calcium based sorbent;

fLanguage

English

Publisher

ieee

Conference_Titel

Computer Distributed Control and Intelligent Environmental Monitoring (CDCIEM), 2011 International Conference on

Conference_Location

Changsha

Print_ISBN

978-1-61284-278-3

Electronic_ISBN

978-0-7695-4350-5

Type

conf

DOI

10.1109/CDCIEM.2011.577

Filename

5748232