甲酸/甲酸钠还原体系对Fe(II)EDTA络合脱硝液再生的影响

邓军; 张国孟

doi:10.12434/j.issn.2097-2547.20230191

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甲酸/甲酸钠还原体系对Fe(II)EDTA络合脱硝液再生的影响

绿色低碳化工技术

- 甲酸/甲酸钠还原体系对Fe(II)EDTA络合脱硝液再生的影响
- Effect of formic acid/sodium formate reduction system on regeneration of Fe(II)EDTA complexation denitrification solution
- 低碳化学与化工 2024, 49(2): 74-79.
- 作者机构：
  
  1.长沙华时捷环保科技发展股份有限公司，湖南长沙 410000
  2.上海亨远船舶设备有限公司，上海 201709
- 作者简介：
  
  邓军（1991—），硕士，工程师，研究方向为废气、废水处理以及资源循环利用，E-mail：704612358@qq.com。
- 基金信息：
  
  工业和信息化部高技术船舶科研计划重大工程与专项(CDGC01-KT16)
- DOI：10.12434/j.issn.2097-2547.20230191
  中图分类号： TQ09;X701
- 纸质出版日期：2024-02-25，
  
  收稿日期：2023-05-25，
  
  修回日期：2023-06-30，
- 稿件说明：
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邓军,张国孟.甲酸/甲酸钠还原体系对Fe(II)EDTA络合脱硝液再生的影响[J].低碳化学与化工,2024,49(02):74-79.

DENG Jun,ZHANG Guomeng.Effect of formic acid/sodium formate reduction system on regeneration of Fe(II)EDTA complexation denitrification solution[J].Low-carbon Chemistry and Chemical Engineering,2024,49(02):74-79.
邓军,张国孟.甲酸/甲酸钠还原体系对Fe(II)EDTA络合脱硝液再生的影响[J].低碳化学与化工,2024,49(02):74-79. DOI： 10.12434/j.issn.2097-2547.20230191.

DENG Jun,ZHANG Guomeng.Effect of formic acid/sodium formate reduction system on regeneration of Fe(II)EDTA complexation denitrification solution[J].Low-carbon Chemistry and Chemical Engineering,2024,49(02):74-79. DOI： 10.12434/j.issn.2097-2547.20230191.

摘要

在络合脱硝反应中，Fe(II)EDTA络合脱硝液的还原再生是应用难点之一，而甲酸/甲酸钠体系在钯炭（Pd/AC）催化剂作用下对Fe(II)EDTA络合脱硝液具有较好的还原性。以此为基础，采用控制变量法，分别考察了超声功率、甲酸添加量、甲酸钠添加量和Pd/AC催化剂添加量对Fe(II)EDTA络合脱硝液（脱硝效率为80%）还原再生效果的影响。结果表明，在不开启超声、Pd/AC催化剂作用下，甲酸/甲酸钠还原体系能够有效地还原Fe(II)EDTA络合脱硝液中的NO，实现络合脱硝液的还原再生。当甲酸钠添加量为10.00 g/L，甲酸添加量为2.10 g/L，Pd/AC催化剂添加量为3.00 g/L时，得到的再生络合脱硝液在50 ℃下的脱硝性能最好（在60 min内脱硝效率达97%以上，在90 min内脱硝效率达80%以上）。继续进行多次络合脱硝-还原再生的连续实验，整个体系仍具备较好的脱硝性能（第6次切换时，持续吸收70~80 min的脱硝效率为85%左右）。该研究结果可为络合脱硝连续化的中试试验以及工程应用提供参考。

Abstract

In the complexation denitrification reaction

the reduction and regeneration of Fe(II)EDTA complexation denitrification solution is one of the application difficulties

and formic acid/sodium formate system has a good reducing property on Fe(II)EDTA complexation denitrification solution under the action of palladium carbon (Pd/AC) catalyst. On this basis

the effects of ultrasonic power

formic acid amount

sodium formate amount and Pd/AC catalyst amount on the reduction and regeneration of Fe(II)EDTA complexation denitrification solution (denitrification efficiency is 80%) were investigated by using control variable method. The results show that under the action of Pd/AC catalyst without ultrasonic

the formic acid/sodium formate reduction system can effectively reduce NO in Fe(II)EDTA complexation denitrification solution

and achieve the reduction and regeneration of the complexation denitrification solution. When the amount of sodium formate is 10.00 g/L

the amount of formate is 2.10 g/L

and the amount of Pd/AC catalyst is 3.00 g/L

the denitrification performance of the regenerated complexation denitrification solution exhibits the best denitrification performance at 50 ℃ (the denitrification efficiency reaches more than 97% within 60 min and the denitrification efficiency reaches more than 80% within 90 min). After several times of continuous complexation denitrification and reduction regeneration experiments

the whole system still has good denitrification performance (at the 6th switching

the denitrification efficiency is about 85% within continuous absorption for 70 min to 80 min). The results can provide reference for the pilot test and engineering application of continuous complexation denitrification.

关键词

Fe(II)EDTA络合脱硝液还原再生甲酸/甲酸钠体系钯炭催化剂连续化反应

Keywords

Fe(II)EDTA complexation denitrification solutionreduction regenerationformic acid/sodium formate systempalladium carbon catalystcontinuous experiment

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