Kinetics of chemical neutralisation of chlorine by a small dispersed water stream with a neutraliser

 

Lesko Andrei

National University of Civil Protection of Ukraine

https://orcid.org/0009-0003-2053-2362

 

Kulakov Oleg

National University of Civil Protection of Ukraine

https://orcid.org/0000-0001-5236-1949

 

Katunin Albert

Ivan Kozhedub Kharkiv National Air Force University

http://orcid.org/0000-0003-2171-4558

 

Maladyka Igor

Cherkasy State Technological University

http://orcid.org/0000-0001-8784-2814

 

DOI: https://doi.org/10.52363/2524-0226-2025-41-6

 

Keywords: chemical kinetics equation, chemical neutralisation, chlorine, model, small dispersed water stream

 

Аnnotation

 

The kinetics of chemical neutralization of chlorine when neutralizers are added to a fine water stream during precipitation is investigated. It has been shown that the activity of chemical neutralizers that can be added to a fine water stream is different in the chemical reaction with chlorine. The practical application of sodium hydroxide or calcium hydroxide as chemical chlorine neutralisers is proposed. On the basis of the model of chlorine neutralisation by a small dispersed stream of clean water, a mathematical model of chlorine neutralisation by a small dispersed stream of water with a chemical neutraliser was developed. The model is based on the assumption that during the chemical neutralisation of chlorine with a small dispersed water stream with a neutraliser, the chemical reaction rate is calculated according to the standard chemical kinetics equation. The kinetics of the process of chemical neutralisation of chlorine by a small dispersed water stream with sodium hydroxide has been studied. The addition of sodium hydroxide to the small dispersed water stream leads to an increase in the rate of neutralisation of gaseous chlorine over the full range of changes in the intensity of the small dispersed water stream with the neutraliser with dynamics similar to the case of neutralisation with pure water. It is recommended to limit the intensity of the supply of a small dispersed stream of water with the sodium hydroxide neutraliser to 1.5÷1.7 l/(s·m2). An increase in the concentration of the neutraliser in water will result in a significant increase in the rate of neutralisation of gaseous chlorine. For chemical neutralisation (deposition) of gaseous chlorine with a small dispersed water stream with the addition of sodium hydroxide, it is advisable to use concentrated mixtures. At an intensity of 2.0 l/(s·m2) of a small dispersed water stream and a concentration of 0.5 kg/kg of sodium hydroxide in the water, the rate of neutralisation of gaseous chlorine increases by 90 %, and at a concentration of 1.0 kg/kg – by 140 %.

 

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  • А. Lesko, O. Kulakov, A. Katunin, I. Maladyka. Kinetics of chemical neutralisation of chlorine by a small dispersed water stream with a neutraliser. Р. 88-99.