Agricultural and Biosystems Engineering Publications
Campus Units
Agricultural and Biosystems Engineering, Civil, Construction and Environmental Engineering, Food Science and Human Nutrition, Environmental Science, Toxicology
Document Type
Article
Publication Version
Published Version
Publication Date
9-14-2020
Journal or Book Title
Energies
Volume
13
Issue
18
First Page
4790
Research Focus Area(s)
Biological and Process Engineering and Technology
DOI
10.3390/en13184790
Abstract
This 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).
Access
Open
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Copyright Owner
The Author(s)
Copyright Date
2020
Language
en
File Format
application/pdf
Recommended Citation
Matyjewicz, Bartosz; Świechowski, Kacper; Koziel, Jacek A.; and Białowiec, Andrzej, "Proof-of-Concept of High-Pressure Torrefaction for Improvement of Pelletized Biomass Fuel Properties and Process Cost Reduction" (2020). Agricultural and Biosystems Engineering Publications. 1161.
https://lib.dr.iastate.edu/abe_eng_pubs/1161
Included in
Agriculture Commons, Bioresource and Agricultural Engineering Commons, Energy Systems Commons
Comments
This article is published as Matyjewicz, Bartosz, Kacper Świechowski, Jacek A. Koziel, and Andrzej Białowiec. "Proof-of-Concept of High-Pressure Torrefaction for Improvement of Pelletized Biomass Fuel Properties and Process Cost Reduction." Energies 13, no. 18 (2020): 4790. DOI: 10.3390/en13184790. Posted with permission.