水力空化协同纳米铁酸钴催化PMS脱硝研究

doi:10.16411/j.cnki.issn1006-7736.2025.03.013

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大连海事大学学报 ›› 2025, Vol. 51 ›› Issue (3) : 123-130. DOI: 10.16411/j.cnki.issn1006-7736.2025.03.013

水力空化协同纳米铁酸钴催化PMS脱硝研究

尉世平,赵兴达,王沛寒，杨金刚,宋立国^*

作者信息 +

De-NO_x of PMS catalyzed by hydrodynamic cavitation coordinated with nano cobalt ferrite

WEI Shiping, ZHAO Xingda, WANG Peihan,YANG Jingang, SONG Liguo^*

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文章历史 +

摘要

针对湿法处理船舶尾气时脱硝率低和氧化剂浓度用量高的问题，提出一种基于水力空化协同纳米铁酸钴催化单过硫酸氢钾（PMS）的新型脱硝方法，并通过实验研究了溶液浓度、温度、压力差、催化剂浓度及海水碱活化等因素对NO_x去除率的影响。结果表明，淡水工况下,各因素对脱硝效率的影响呈现先促进后抑制的趋势，最佳条件为PMS浓度0.4 mol/L、压力差400 kPa、反应时间0.962 s、纳米铁酸钴浓度0.1 g/L及溶液温度55°C。此时，NO_x脱硝率达90.07%；在模拟海水工况下，经碱活化后脱硝效率进一步提升至最高，达96.42%。本研究为船舶尾气高效脱硝提供了一种可借鉴的新方法。

Abstract

Aiming at the problems of low denitrification rate and high consumption of oxidant concentration during the wet treatment of ship exhaust gas, a novel denitrification method based on the synergistic effect of hydraulic cavitation and cobalt ferrite nanoparticles catalyzing potassium peroxymonosulfate (PMS) was proposed, and the effects of factors such as solution concentration, temperature, pressure difference, catalyst concentration, and seawater alkali activation on NOx removal rate were studied through experiments. The experimental results show that, under the fresh water condition, the effect of each factor on the denitrification efficiency underscores a trend of promotion first and then inhibition. The optimal conditions are derived as follows:a PMS concentration of 0.4 mol/L, a pressure difference of 400 kPa, a reaction time of 0.962 s, a cobalt ferrite nanoparticles concentration of 0.1 g/L, and a solution temperature of 55°C. Under these conditions, a NOx denitrification rate of 90.07% was achieved. Under the simulated seawater condition, after alkali activation, the denitrification efficiency is further increased to a maximum of 96.42%. This study provides a new method for efficient denitrification of ship exhaust gas.

导出引用

尉世平, 赵兴达, 王沛寒, 杨金刚, 宋立国. 水力空化协同纳米铁酸钴催化PMS脱硝研究[J]. 大连海事大学学报. 2025, 51(3): 123-130 https://doi.org/10.16411/j.cnki.issn1006-7736.2025.03.013

WEI Shiping, ZHAO Xingda, WANG Peihan, YANG Jingang, SONG Liguo. De-NO_x of PMS catalyzed by hydrodynamic cavitation coordinated with nano cobalt ferrite[J]. Journal of Dalian Maritime University. 2025, 51(3): 123-130 https://doi.org/10.16411/j.cnki.issn1006-7736.2025.03.013

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