Microstructural degradation during the storage of biomass pellets

Journal article (2021)

Authors

L. Cutz Large Scale Energy Storage - Mechanical, Maritime and Materials Engineering
U. Tiringer Team Arjan Mol - Mechanical, Maritime and Materials Engineering
H. Gilvari Large Scale Energy Storage - Mechanical, Maritime and Materials Engineering
D.L. Schott Transport Engineering and Logistics - Mechanical, Maritime and Materials Engineering
J.M.C. Mol Team Arjan Mol - Mechanical, Maritime and Materials Engineering
W. de Jong Large Scale Energy Storage - Mechanical, Maritime and Materials Engineering
Research Group
Large Scale Energy Storage (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2021 L. Cutz, U. Tiringer, H. Gilvari, D.L. Schott, J.M.C. Mol, W. de Jong
DOI: https://doi.org/10.1038/s43246-020-00113-y
More Info
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Published Date

2021

Language

English

Faculty

Mechanical, Maritime and Materials Engineering

Department

Process and Energy

Research Group

Large Scale Energy Storage

Abstract

The use of biomass pellets as a source of renewable energy has increased in recent times. However, pellet storage during transportation can compromise their properties, due to fluctuating temperature and humid environments. Here, we show that extended storage of one month at 40 °C and 85% relative humidity causes significant biomass pellet degradation. This was evidenced by higher pellet porosity, weight gain, increased inclusion body formation and creation of an internal network of cracks. We quantify the inclusion and pore growth processes at the surface and within the pellets, which has implications for subsequent thermochemical conversion. The global bioenergy transition may depend upon biomass pellets, and this study shows that storage conditions are critical in the supply chain, so to maintain their quality. Without the development of stronger policies to avoid premature degradation of biomass pellets, they may not realize their full potential as a bioenergy source.