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

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

doi:10.16411/j.cnki.issn1006-7736.2025.03.013

Journal of Dalian Maritime University >

2025 , Vol. 51 >Issue 3: 123 - 130

DOI: https://doi.org/10.16411/j.cnki.issn1006-7736.2025.03.013

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

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(Marine Engineering College, Dalian Maritime University, Dalian 116026, China)

Online published: 2025-04-18

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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.

Key words： ship exhaust gasde;nitration treatment;hydrodynamic cavitation; potassium monopersulfate(PMS); nano cobalt ferrite

Cite this article

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 . DOI: 10.16411/j.cnki.issn1006-7736.2025.03.013

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