Abstract
The issues of numerical modeling of chemical-thermal processing of cellulose-containing waste are considered. The simulation results are presented in comparison with the data of experiments carried out in a horizontal pyrolysis reactor with a turner at various process temperatures. The process and the resulting products are influenced by the factors of the mixing rate of the products in the reactor core and the temperature distribution in this zone. To describe the thermal processes and chemical kinetics of cellulose pyrolysis, a model proposed by Yu. Dean was chosen, in which the process is represented by a heterogeneous n-order reaction and the Arrhenius equation. It is assumed that the process of heat transfer during pyrolysis takes place inside a horizontal tube of circular cross-section under conditions of free convection in a limited volume, which has an excess temperature in relation to the surrounding space. It is shown that the results obtained with the help of numerical modeling make it possible to choose the most optimal value of the linear movement of the material in the reactor vessel, depending on the required mode of chemical-thermal processing of cellulose-containing waste.
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