COMPARISON OF METHODS FOR THE CALCULATION OF HEAT OF COMBUSTION OF BIOPOLYMERS
Abstract
In this paper, various methods for calculating the higher (Q) and lower (q) calorific values for plant biopolymers (lignin, cellulose, hemicellulose, starch, pectin, proteins) and some other components of biomass (resin acids, lipids, ). The results of the studies showed that calculations using the Eq parameter (i.e., the combustion energy per 1 g of O2) give a deviation from the experimental values of about 4% for Q and more than 7% for q. In the case of calculations based on the contribution of structural groups of polymers, the deviation is on average 3%. The lowest deviation from the experimental data, about 0,5% for Q and less than 1% for q, was obtained using an improved calculation method that is based on determining the elemental composition of biopolymers and other biomass components. Calculations of the calorific values for biomass samples using the proposed improved method were very close to the experimental values of the calorific value. It has been found that the most preferred method of waste disposal is the burning of pellets, their waste plant biomass and polyolefins, since this combustion method provides more high calorific value and increased thermal energy density than a single combustion of only biomass and is accompanied by a smaller amount Carbon dioxide in comparison with the separate burning of only waste polyolefins.Downloads
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