Effects of Water Vapor and Ammonia on SO2 Removal from Flue Gases using Pulsed Corona Discharge

被引：14

作者：

Yimin Z. ^{[1
]}

Chae J.O. ^{[2
]}

Kim K.Y. ^{[2
]}

Kim K.O. ^{[2
]}

Park Y.K. ^{[2
]}

机构：

[1] NTP Appl. Technol. Lab., Environ. Eng. College, Dalian Maritime Univ.

[2] Combustion Lab., Department of Mechanical Engineering, Inha Univ.

来源：

Plasma Chemistry and Plasma Processing | 2002年 / 22卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Ammonia; Desulfurization; Pulsed corona discharge; Water vapor;

D O I：

10.1023/A:1012952917791

中图分类号：

学科分类号：

摘要：

In the study of SO2 removal using pulsed corona discharge, there exists a serious confusion, that is, which kind of reactions, the thermal chemical reactions or the radical chemical reactions, plays a dominant role in SO2 removal? In this work, through some experiments together with qualitative analyses, this confusion has been clarified. Pulsed corona discharge induces the radical reactions that mainly contribute to oxidizing SO2. High relative humidity in flue gas is a basis of the heterogeneous radical reactions. Ammonia not only is an additive but also accelerates the oxidization of SO2. Only by synergistic effects of pulsed corona discharge, relative humidity and ammonia, can it be effective to oxidize SO2 via the heterogeneous radical reactions. In the SO 2 removal, the essence of heterogeneous reactions is the radical reactions both in gas phase and at aerosol surface, which is the reason of the oxidization of SO2. It has also been evaluated that in an optimum process the oxidization of SO2 in gas phase is responsible for about 30%, and at the aerosol surface is about 50%, while the thermal chemical reactions result in about 20%, of all the removed SO2.

引用

页码：187 / 195

页数：8

共 10 条

[1]

Paur H.R., Et al., Aerosol formation in the electron beam dry scrubbing process, Radiat. Phys. Chem., 31, (1988)

[2]

Civitano L., Removal of toxic gases by corona discharge processing, Proc. Intern. Symp. on Appl. of Isotopes and Radiation in Conservation of the Environment, (1992)

[3]

Matzing H., Chemical kinetics of flue gas cleaning by irradiation with electrons, Advances in Chemical Physics, 130, pp. 315-402

[4]

Li R., Heterogeneous reactions in removal of SO2 by corona discharge, Proc. 10th Particulate Control Symp. and 5th Int. Conf. Electrostatic Precipitation, (1993)

[5]

Chakrabarti A., Et al., Gas cleaning with a semi-wet type plasma reactor, IEEE Trans. Ind. Appl., 31, 3, (1995)

[6]

Gallimberti I., Impulse corona simulation for flue gas treatment, Pure and Appl. Chem., 60, 6, (1988)

[7]

Jordan S., Et al., Physical and chemical properties of the aerosol produced by the electron beam dry scrubbing of flue gas, Aerosol Sci., 17, 4, (1986)

[8]

Chang J.S., The role of H2O and NH3 on the formation of NH 4NO3 aerosol particles and De-NOx under the corona discharge treatment of combustion flue gases, J. Aerosol Sci., 20, 8, (1989)

[9]

Yimin Z., Et al., Matching between generator and reactor for producing pulsed corona discharge, J. Electrostatics, 44, (1998)

[10]

Yimin Z., Et al., Optimization of pulsed corona discharge for flue gas treatment, Proc. 7th Intern. Conf. on Electrostatic Precipitation, pp. 207-211, (1998)

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