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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

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  • 国家科技期刊平台
  • NETL
  • NSTL
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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。
Effect of formic acid/sodium formate reduction system on regeneration of Fe(Ⅱ)EDTA complexation denitrification solution
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.

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

邓军、张国孟

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长沙华时捷环保科技发展股份有限公司,湖南 长沙 410000

上海亨远船舶设备有限公司,上海 201709

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

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

2024

10.12434/j.issn.2097-2547.20230191

天然气化工—C1化学与化工
西南化工研究设计院有限公司 全国天然气化工与碳一化工信息中心

天然气化工—C1化学与化工

CSTPCD北大核心
影响因子：0.814
ISSN：1001-9219
年,卷(期)：2024.49(2)
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