Efficient Removal of SO<sub>3</sub> from Coal-fired Flue Gas Using Low- particle-size Absorbents Synthesized by Inhibition Method

HANG Wenlin; ZHAO Ronghang; SUN Jiaxing; HE Yongtao; GONG Hongqiang; YAO Jingjing; LI Hua; XIE Ling'ou

doi:10.19805/j.cnki.jcspe.2026.250050

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Efficient Removal of SO₃ from Coal-fired Flue Gas Using Low- particle-size Absorbents Synthesized by Inhibition Method

更新时间：2026-10-10

- Efficient Removal of SO₃ from Coal-fired Flue Gas Using Low- particle-size Absorbents Synthesized by Inhibition Method
- Chinese Journal of Power Engineering Vol. 46, Issue 5, Pages: 165-172,183(2026)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2026.250050
  CLC： X701.3
- Published：2026
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杭文林, 赵荣杭, 孙佳兴, 和永涛, 龚宏强, 姚晶晶, 李华, 谢灵欧. 基于抑制法合成的低粒径吸收剂高效脱除燃煤烟气中的SO3[J]. 动力工程学报, 2026, 46(5): 165-172,183.
杭文林, 赵荣杭, 孙佳兴, 和永涛, 龚宏强, 姚晶晶, 李华, 谢灵欧. 基于抑制法合成的低粒径吸收剂高效脱除燃煤烟气中的SO3[J]. 动力工程学报, 2026, 46(5): 165-172,183. DOI： 10.19805/j.cnki.jcspe.2026.250050.

DOI： 10.19805/j.cnki.jcspe.2026.250050

摘要

燃煤过程中产生的SO3不仅会对火电厂设备和选择性催化还原(SCR)系统的催化剂造成损害

还会危害人体健康

因此对燃煤烟气中的SO3进行脱除具有极其重要的意义。采用抑制法合成了低粒径的氢氧化钙

并深入探究了不同添加剂对氢氧化钙晶体生长的抑制作用。同时

系统分析了吸收剂粒径、SO3初始浓度、m(Ca)/m(S)、吸收剂停留时间及烟气温度等因素对SO3脱除率的影响

并进一步研究了反应机理。结果表明:氢氧化钙-苯甲酸钠的粒径最小且分布均匀

其SO3脱除率最高

具有良好的经济性;吸收剂的停留时间、m(Ca)/m(S)、SO3初始浓度及烟气温度均会对SO3的脱除率产生显著影响;反应过程中产物层呈现出岛状效应生长趋势

而Bangham模型能够较好地描述SO3的吸附动力学行为。

Abstract

The SO3 generated during coal combustion in thermal power plants not only damages equipment and catalysts in selective catalytic reduction (SCR) systems but also poses significant health risks. Therefore

the removal of SO3 from coal-fired flue gas is of great importance. The low-particle-size calcium hydroxide was synthesized using the inhibition method

and the effects of different additives on the crystal growth of calcium hydroxide were thoroughly investigated. The impact of various factors such as the absorbent particle size

initial SO3 concentration

m(Ca)/m(S)

absorbent residence time

and flue gas temperature on SO3 removal efficiency was systematically analyzed. The reaction mechanism was also further explored. Results show that the calcium hydroxide-sodium benzoate absorbent

which has the smallest and most uniform particle size

achieves the highest SO3 removal efficiency and offers good economic viability. The absorbent's residence time

m(Ca)/m(S)

initial SO3 concentration

and flue gas temperature can significantly influence SO3 removal efficiency. During the reaction

the product layer exhibits an island growth effect

and the Bangham model is found to describe the adsorption kinetics of SO3 effectively.

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references

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Efficient Removal of SO3 from Coal-fired Flue Gas Using Low- particle-size Absorbents Synthesized by Inhibition Method

DOI：10.19805/j.cnki.jcspe.2026.250050

摘要

Abstract

关键词

Keywords

references

Efficient Removal of SO₃ from Coal-fired Flue Gas Using Low- particle-size Absorbents Synthesized by Inhibition Method