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For Industry

Ash-free pellets from low-value biomass: The BiAR process

BiAR  (Biomass Ash Removal) process is capable to separate the organics, which are valid for energetic uses, from inorganic components, which are a limitation for energetic uses but however, contain valuable elements.

BiAR process  contains three steps:

1. Liquefaction reaction: performed by solvolysis of biomass at moderate temperatures (175-225°C) in presence of methanol or methanol-glycerol mixture and an acidic homogeneous catalyst.

2. Ash separation: After the liquefaction of organic matter, separation of inorganic particles is crucial. This is done through the physical separation (filtration) or sedimentation

3. Solvent recocery: the ash-free liquid mass enters a second continuous reactor where the solvent is distilled and thus fully recovered, while the depolymerized biomass remains at the bottom of the reactor and can be shaped into any solid form or left semi-liquid.

Main advantages

• Biomass not suitable for energetic uses can be valorized.
• Pellets can be shaped into any solid form.
• Low-energy demanding process and high calorific value of the product (21 MJ/kg).
• Isolated ash can be used as a fertilizer.


Fields of use: Valorization of biomass (bark, straw, digestate) with ash content above fuel standard threshold (0.7 wt.% for A1 pellets).

Technology Readiness Level: TRL3

Intellectual property: Patent pending

Partner sought: R&D collaboration to further develop the technology in an industrial environment, licensing or sell of IP rights.

Next steps needed: Testing in an industrial environment, scale-up.

Co-ownership: Kyoto Research S.r.l.





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