Influence of biomass on multi-component reaction model and combustion products of coal gangue

The effects of biomass on coal gangue combustion characteristics, combustion products and combustion reaction model are studied in this paper. Based on the thermogravimetric experimental data, a multi-component combustion reaction model for coal gangue and biomass was established. The CG combustion reaction mechanism can be well explained by the two-component combustion reaction model. The partic-ipation degree of organic matter and inorganic matter is 90% and 10%, respectively. C3P1, C1P1 and C1P3 can be better explained by the five-component combustion reaction model. The reaction model corre-sponding to PS is a four-component combustion reaction model. Moreover, it is found that the addition of biomass can promote the combustion reaction of coal gangue and the production of gas products using Fourier transform infrared spectroscopy technology. Through combustion, the proportion of F4 mode of Cr, Cd, Pb, Cu, and Ni for CG sample increased from 92%, 60%, 52%, 28% and 60% to 95%, 90%, 82%, 91% and 94%, respectively. The toxicity reduction effect for Cd, Pb, Cu, and Ni is obvious, and the proportion of F4 mode is increased by more than 30%. Compared with other mixed samples, the ash formed by C1P1 is less harmful. (c) 2022 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

Automated summary

This paper studies the effects of biomass on the combustion characteristics, combustion products, and combustion reaction model of coal gangue. A multi-component combustion reaction model for coal gangue and biomass is established based on thermogravimetric experimental data. The addition of biomass is found to promote the combustion reaction of coal gangue and the production of gas products. Different combustion reaction models provide better explanations for different combustion processes.