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Abstract
Disposal of solid municipal waste is a pressing issue of our time. Using waste as raw material to alternative fuels production is a promising area of recycling. This will allow partial replacement of traditional solid fuel. Biomass is proposed to be added during combustion of refuse derived fuels to reduce hazardous emissions. At the same time, the selection of a fuel composition based on solid municipal waste and biomass requires studying its thermal properties and the kinetics of the destruction process. The main combustible components of solid municipal waste (cardboard, polyethylene, fabric) and agricultural waste (corn harvest residues) were used as raw materials for creating experimental fuel. Studies of thermal characteristics of the fuel were carried out using thermogravimetry and differential thermal analysis methods. The characteristic temperatures of the stages of destruction (dehydration, decomposition of organic and mineral substances) were determined. Data on the content of water, organic and mineral substances and ash were obtained. The rates of thermal destruction of organic substances were calculated at different heating phases, as well as the heat of combustion was determined. The destruction kinetics and heat generation were compared at different stages of thermal decomposition of organic substances. Analysis of the obtained results showed that the studied samples of composite fuel have a similar nature of thermal destruction, since the composition of the fuel is limited to polyethylene and lignocellulosic raw materials. It has been established that the presence of polyethylene in fuel determines its high calorific value. The obtained research results made it possible to recommend experimental fuel compositions for production and use with control over combustion technology, which guarantees the neutralization of hazardous combustion products. A technology for producing alternative composite fuel based on solid municipal and agricultural waste was proposed.
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