Considerations on factors affecting biochar densification behavior based on a multiparameter model

The optimization of upscaled biochar pelleting is limited by lack knowledge regarding the effects process parameters. A multiparameter model, coupled to a single pellet press unit, was for first time applied production predict behavior. model permits estimate in and cost-effective way how die friction forces, quantified through exiting pressure, are affected key It observed that achieve acceptably low pressures (in order 100 MPa), it critical produce at high temperatures (e.g. 600 °C). Addition water as binder also beneficial, while pelletization temperature does not significantly affect pressure. Furthermore, when pyrolysis oil used binder, lower were measured. Biochar returned higher pressure values compared with untreated wood, but torrefied wood. Moreover, correlation between density compressive strength examined. found trend good indicator mechanical quality pellets.