Promotion effect of Ca(OH)2 on NO removal by H2O2 in alkaline system

ZHAO Hanchen; LI Yang; YANG Chenglong; YAO Mingyu; ZHAO Tingwen; CHENG Guangwen

doi:10.19666/j.rlfd.201901062

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Promotion effect of Ca(OH)₂ on NO removal by H₂O₂ in alkaline system

更新时间：2025-09-28

- Promotion effect of Ca(OH)₂ on NO removal by H₂O₂ in alkaline system
- Thermal Power Generation Vol. 48, Issue 10, Pages: 57-64(2019)
- 作者机构：
  
  西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201901062
  CLC： X701.7
- Published Online：29 September 2019，
  
  Published：2019
- 稿件说明：
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ZHAO Hanchen, LI Yang, YANG Chenglong, et al. Promotion effect of Ca(OH)₂ on NO removal by H₂O₂ in alkaline system[J]. Thermal power generation, 2019, 48(10): 57-64.
DOI：

ZHAO Hanchen, LI Yang, YANG Chenglong, et al. Promotion effect of Ca(OH)₂ on NO removal by H₂O₂ in alkaline system[J]. Thermal power generation, 2019, 48(10): 57-64. DOI： 10.19666/j.rlfd.201901062.

摘要

本文搭建小型鼓泡试验系统

研究了H_2O_2在碱性条件下的脱硝机理

对比了不同金属对H_2O_2脱硝效果的催化作用与催化机理

探究了NaOH-Ca(OH)_2-H_2O_2体系脱除烟气中NO的关键试验参数。结果表明:在小型试验台上H_2O_2分解产生的×O_2~-对NO有显著的氧化脱除效果;Ca(OH)_2可以促进H_2O_2分解产生×O_2~-;NaOH-Ca(OH)2-H_2O_2体系中添加Ca(OH)_2最佳质量分数为0.1%

吸收液最佳温度为45℃;在单独脱除NO时

NaOH-Ca(OH)_2-H_2O_2体系NO脱除效率最高可以达到90%;在流量为100 m~3/h的中试喷淋塔试验台上进行稳态试验

NaOH-Ca(OH)_2-H_2O_2体系最高NO脱除效率可以维持在71.1%。

Abstract

On a self-built small-scale bubbling experimental system

the denitrification mechanism of H_2O_2 in alkaline environment was investigated. The role of different metals in catalyzing H_2O_2 denitrification was studied

and the key parameters for NO removal in the NaOH-Ca(OH)_2-H_2O_2 system were discussed. The results indicate that

the ×O_2~- radical decomposed from H_2O_2 had strong oxidability to NO. The addition of Ca(OH)2 could facilitate the generation of ×O_2~- radical from H_2O_2. The denitrification efficiency reached 90% as the addition concentration of Ca(OH)_2 was 0.1% and the temperature of absorbent was 45 ℃. Furthermore

the denitrification efficiency maintained at 71.1% in steady state test of pilot spray tower with flow rate of 100 m~3/h.

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