Influence of flue gas desulfurization (FGD) installations on emission characteristics of PM2.5 from coal-fired power plants equipped with selective catalytic reduction (SCR)

被引：68

作者：

Li, Zhen ^{[1
]}

Jiang, Jingkun ^{[1
,2
]}

Ma, Zizhen ^{[1
]}

Fajardo, Oscar A. ^{[1
,3
]}

Deng, Jianguo ^{[1
]}

Duan, Lei ^{[1
,4
]}

机构：

[1] Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing, Peoples R China

[2] Tsinghua Univ, State Environm Protect Key Lab Sources & Control, Beijing, Peoples R China

[3] Cent Univ, Fac Engn & Basic Sci, Dept Environm Engn, Bogota, Colombia

[4] Tsinghua Univ, Collaborat Innovat Ctr Reg Environm Qual, Beijing, Peoples R China

来源：

ENVIRONMENTAL POLLUTION | 2017年 / 230卷

关键词：

PM2.5; Coal-fired power plant; Flue gas desulfurization (FGD); Selective catalytic reduction (SCR); Water-soluble ions; Primary ammonium aerosol emissions; Ammonia slip; ATMOSPHERIC AMMONIA; ELECTROSTATIC PRECIPITATORS; CHEMICAL-CHARACTERIZATION; SUBMICRON PARTICLES; PARTICULATE MATTER; TRACE-ELEMENTS; SULFURIC-ACID; AEROSOL; INVENTORY; PENETRATION;

D O I：

10.1016/j.envpol.2017.06.103

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Flue gas desulfurization (FGD) and selective catalytic reduction (SCR) technologies have been widely used to control the emissions of sulphur dioxide (SO2) and nitrogen oxides (NOx) from coal-fired power plants (CFPP5). Field measurements of emission characteristics of four conventional CFPPs indicated a significant increase in particulate ionic species, increasing PM2.5 emission with FGD and SCR installations. The mean concentrations of PM2.5 from all CFPP5 tested were 3.79 +/- 137 mg/m(3) and 5.02 +/- 1.73 mg/m(3) at the FGD inlet and outlet, respectively, and the corresponding contributions of ionic species were 19.1 7.7% and 38.2 7.8%, respectively. The FGD was found to enhance the conversion of NH3 slip from the SCR to NH4- in the PM2.5, together with the conversion of SO2 to SO42-, and increased the primary NH4+ and SO42- aerosol emissions by approximately 18.9 and 4.2 times, respectively. This adverse effect should be considered when updating the emission inventory of CFPP5 and should draw the attention of policy makers for future air pollution control. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：655 / 662

页数：8

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