Co-pelleting of biomass feedstock: Effects of blend types and ratios on mechanical behavior and physical properties

Haomeng He, Kai Wu, Yu Wang, Yu Sun and Jiahong Wu

Renewable Energy, 2025, vol. 244, issue C

Abstract: Co-pelleting of feedstock blends was conducted in the single pelleting press to improve pellet quality. The mechanical behavior of feedstock blends during the densification process was analyzed based on chemical component contents. Physical properties were evaluated. Results show total absorbance intensity reflects the differences in chemical component contents. Time to default force, the specific at the same time, boundary point, maximum force, and relaxation stages vary with blend additions because chemical components have synergistic effects. Orange peel (OP) rich in pectin increases pellet strength with a relative percentage of −8.29–9.53 % and immersing time of 68.97–162.07 % than pure corn stalks (CS) pellets. Rapeseed oil cake (ROC) rich in protein reduces energy consumption and enhances water resistance by 62.07–213.79 %. Walnut shells (WS) with lignin increase cracks on the pellet surface and weaken the binding force. All feedstock blends improve energy density, 30ROC70CS are the best recipes for transport and quality upgrades. This study proves the potential of industrial and municipal wastes for biomass pellet production and provides references to select feedstock types and optimization for formulation recipes for pelleting.

Keywords: Feedstock blends; Densification; Single pelleting press; Formulation recipes; Immersing test (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:244:y:2025:i:c:s096014812500240x

DOI: 10.1016/j.renene.2025.122578

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