Bioethanol is recognized as a valuable substitute for renewable energy sources to meet the fuel and energy demand, considered an environmentally friendly resource obtained from agricultural residues such as sugarcane bagasse, wheat straw, corn and rice straw. Lignocellulosic biomass (LCB) is the point of attention in replacing the dependence on fossil fuels. The recalcitrant structure of the lignocellulosic biomass is disrupted using effective pretreatment techniques that separate complex interlinked structures among cellulose, hemicellulose, and lignin. Recently, the thermophysical method or high-temperature steam explosion treatment of lignocellulosic biomass under pressure has become more popular. The method of decompression or steam explosion changes the biostructure of the product, destroys lignin bonds and affects the composition of the obtained products. The optimal conditions for explosive defibrillation are preliminary moistening of the product with water, a heating temperature of up to 200 ^oC and a processing time of 10 minutes, which contributes to the transition of cellulose into a more accessible amorphous form, which later becomes available for enzymatic hydrolysis under the action of cellulases with the formation of sugars, which are fermented by yeast in ethyl alcohol – glucose, fructose.

The obtained results show that with an increase in the processing temperature from 150 to 200 ^oC, the delignification of cellulose-containing raw materials increases, which is evidenced by a decrease in the content of residual lignin by 2.2 times, a decrease in the residual content of hemicelluloses in the product from 16.76 to 2.6%.