Proof-of-Concept of High-Pressure Torrefaction for Improvement of Pelletized Biomass Fuel Properties and Process Cost Reduction
Bartosz Matyjewicz , Kacper Świechowski , Jacek A. Kozieł , Andrzej Białowiec
AbstractThis paper provides a comprehensive description of the new approach to biomass torrefaction under high-pressure conditions. A new type of laboratory-scale high-pressure reactor was designed and built. The aim of the study was to compare the high-pressure torrefaction with conventional near atmospheric pressure torrefaction. Specifically, we investigated the torrefaction process influence on the fuel properties of wooden-pellet for two different pressure regimes up to 15 bar. All torrefaction processes were conducted at 300 °C, at 30 min of residence time. The initial analysis of the increased pressure impact on the torrefaction parameters: mass yields, energy densification ratio, energy yield, process energy consumption, the proximate analysis, high heating value, and energy needed to grind torrefied pellets was completed. The results show that high-pressure torrefaction needed up to six percent less energy, whereas energy densification in the pellet was ~12% higher compared to conventional torrefaction. The presence of pressure during torrefaction did not have an impact on the energy required for pellet grinding (p < 0.05).
|Journal series||Energies, [ENERGIES], ISSN 1996-1073, (N/A 140 pkt)|
|Publication size in sheets||1.3|
|Referenced book||Herak David (eds.): Biomass for Energy Application, Energies, 2021, MDPI, ISBN 978-3-0365-0268-7, [978-3-0365-0269-4], 236 p.|
|Keywords in English||pressure torrefaction; pellet; renewable energy sources; energy consumption; grinding; thermogravimetric analysis; proximate analysis; high heating value; torrefied biomass; biochar|
|License||Journal (articles only); published final; ; with publication|
|Score||= 140.0, 26-04-2021, ArticleFromJournal|
|Publication indicators||= 0; = 0; : 2018 = 1.156; : 2018 = 2.707 (2) - 2018=2.99 (5)|
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