Fine Comminution of Pine Bark: How Does Mechanical Loading Influence Particles Properties and Milling Efficiency?

Karine Rajaonarivony (1) , Xavier Rouau (1) , Komlanvi Lampoh (1) , Jean-Yves Delenne (1) , Claire Mayer-Laigle (1)

1 UMR IATE - Ingénierie des Agro-polymères et Technologies Émergentes

The use of lignocellulosic plant biomass as an alternative to fossil feedstocks for chemistry, energy and materials often involves an intense dry comminution step, for which the energy consumed can vary significantly according to the process parameters, the particle size targeted, and the properties of the biomass. Here we studied the fine milling of maritime pine bark in an impact-mill configuration and in an attrition-mill configuration. The properties of the resulting powders (particle size distribution, particle shape, specific surface area, agglomeration level) obtained in each configuration were compared in relation to process energy consumption. Results evidenced that the agglomeration phenomena drive milling efficiency and limit the possibilities for reaching ultrafine particles. Interestingly, impact loading proved more effective at breaking down coarse particles but tended to generate high agglomeration levels, whereas attrition milling led to less agglomeration and thus to finer particles

Mots clés: Milling efficiency; Mechanical loading; Lignocellulosic biomass; Powder agglomeration; grinding

Mots clés: écorce de pin; biomasse lignocellulosique; broyage; écoprocédé

Domaines: Ingénierie des aliments

Karine Rajaonarivony, Xavier Rouau, Komlanvi Lampoh, Jean-Yves Delenne, Claire Mayer-Laigle. Fine Comminution of Pine Bark: How Does Mechanical Loading Influence Particles Properties and Milling Efficiency?. Bioengineering, 2019, 6 (4), ⟨10.3390/bioengineering6040102⟩. ⟨hal-02373217⟩