{"title":"Kinetics of thermal oxidation of coals, industrial wastes, and their mixtures","authors":"Vadim Dorokhov , Geniy Kuznetsov , Kristina Paushkina , Pavel Strizhak","doi":"10.1016/j.powtec.2025.120712","DOIUrl":null,"url":null,"abstract":"<div><div>Composite fuels based on various wastes are a promising alternative to conventional energy resources. Co-combustion of waste-derived components is characterized by synergistic effects that have a significant impact on combustion performance. This paper presents the results of an experimental study of thermal decomposition characteristics and combustion kinetic parameters for composite fuels based on typical lignite, coal refinery waste, sawdust and used motor oil. Thermogravimetric analysis revealed the influence of individual component properties on the characteristics of their combined thermal oxidation in mixtures. The experiments were carried out in a temperature range of 25–1100 °C, corresponding to industrial combustion chambers. Conditions were identified that ensure significantly higher rates of thermal conversion of fuel mixtures than those of individual components. The influence of heating rate on thermal decomposition of mixed fuels was determined. The dependences of the activation energy of thermal decomposition on the content of volatiles and carbon, as well as ash content and humidity, were obtained. The experiments have shown the conditions under which the size of solid particles, their hydrophilicity and hydrophobicity have a significant influence on the characteristics of the thermal oxidation of fuels. Mathematical expressions were obtained for calculating kinetic characteristics of thermal oxidation of different types of coal using the known properties of the components.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"454 ","pages":"Article 120712"},"PeriodicalIF":4.6000,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Powder Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S003259102500107X","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/1/30 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Composite fuels based on various wastes are a promising alternative to conventional energy resources. Co-combustion of waste-derived components is characterized by synergistic effects that have a significant impact on combustion performance. This paper presents the results of an experimental study of thermal decomposition characteristics and combustion kinetic parameters for composite fuels based on typical lignite, coal refinery waste, sawdust and used motor oil. Thermogravimetric analysis revealed the influence of individual component properties on the characteristics of their combined thermal oxidation in mixtures. The experiments were carried out in a temperature range of 25–1100 °C, corresponding to industrial combustion chambers. Conditions were identified that ensure significantly higher rates of thermal conversion of fuel mixtures than those of individual components. The influence of heating rate on thermal decomposition of mixed fuels was determined. The dependences of the activation energy of thermal decomposition on the content of volatiles and carbon, as well as ash content and humidity, were obtained. The experiments have shown the conditions under which the size of solid particles, their hydrophilicity and hydrophobicity have a significant influence on the characteristics of the thermal oxidation of fuels. Mathematical expressions were obtained for calculating kinetic characteristics of thermal oxidation of different types of coal using the known properties of the components.
期刊介绍：
Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests:
Formation and synthesis of particles by precipitation and other methods.
Modification of particles by agglomeration, coating, comminution and attrition.
Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces).
Packing, failure, flow and permeability of assemblies of particles.
Particle-particle interactions and suspension rheology.
Handling and processing operations such as slurry flow, fluidization, pneumatic conveying.
Interactions between particles and their environment, including delivery of particulate products to the body.
Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters.
For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.
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