Pelletization of torrefied biomass with solid and liquid bio-additives

R. García, M.P. González-Vázquez, A.J. Martín, C. Pevida and F. Rubiera

Renewable Energy, 2020, vol. 151, issue C, 175-183

Abstract: Biomass commonly presents poor physical properties and low energy density that need to be enhanced. Torrefaction and densification are two of the most suitable techniques to this aim. In this work the pelletization of torrefied pine, blended with solid (raw pine and grape pomace) and liquid (glycerol) additives at low temperature (i.e., 40–80 °C) was carried out in a continuous bench-scale flat die pellet mill that simulates the features of a production-scale system. Among all the tested blends, four formulations fulfilled the requirements of the EN-Plus and ISO 17225-2 Industrial Pellets quality standards, which make them suitable fuels for both residential heating systems and power plant boilers. The produced pellets hold higher heating values between 18.8 and 21.7 MJ/kg, energy densities in the range 12.18–15.33 GJ/m3 and optimum physical properties (L = 20–25 mm, Ø = 6.1–6.2 mm, ρp = 1.1–1.2 g/cm3), in line with the reference pine pellets.

Keywords: Biomass; Torrefaction; Pelletization; Waste biomass; Densification (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (10)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:151:y:2020:i:c:p:175-183

DOI: 10.1016/j.renene.2019.11.004

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