Pyrolysis characteristics of biomass torrefied in a quiescent mineral layer

Alexey Korshunov, Boris Kichatov, Ksenia Melnikova, Vladimir Gubernov, Ivan Yakovenko, Alexey Kiverin and Alexandr Golubkov

Energy, 2019, vol. 187, issue C

Abstract: Torrefaction is one of the most efficient techniques for improvement of biomass thermophysical properties. One of the possible methods of torrefaction is the biomass heating inside a quiescent mineral layer in the presence of air. Mineral filler prevents excessive oxidation of biomass and favors more uniform temperature distribution inside the reactor. One can effectively control the properties of biofuel via varying the parameters of torrefaction. The main goal of this work is to study the pyrolysis characteristics of torrefied pine pellets. Thermogravimetric analysis and differential scanning calorimeter were used to study the effect of different torrefaction conditions (including the torrefaction duration, the height and type of mineral filler, the presence of an inhibitor of oxidation reactions) on the pyrolysis behavior of the torrefied biomass. It is shown that the reactivity of fuel decreases with the decrease in height of the mineral layer as well as with the increase in torrefaction duration. In turn, the use of an inhibitor of oxidation reactions (sodium bicarbonate) favors the increase in biofuel reactivity. A correlation between the biofuel reactivity properties and the conditions of torrefaction inside a quiescent mineral layer is obtained as result of the study.

Keywords: Bioenergy; Biomass; Oxidative torrefaction; Pyrolysis kinetics; Combustion; Fuel (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:187:y:2019:i:c:s0360544219317098

DOI: 10.1016/j.energy.2019.116015

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