Sorption and diffusion properties of untreated and thermally modified beech wood dust

Abstract Dynamic water vapor sorption experiments were carried out using beech wood dust (from untreated and thermally modified wood) of two-particle sizes, (< 25 80–250 µm), obtained from abrasive sanding. Sorption isotherms parameterized with the GAB GDW models. Dust had significantly lower equilibrium moisture content compared to material, due reduction in primary sites treated material. The observed changes quantified by coefficients Thermal modification size particles no influence on binding energy molecules being linked secondary sites. Water diffusivity decreased increasing content, but only for monolayer sorption. For higher values, was practically independent content. These results found material as well both fractions. thermal unclear, which is attributed diffusion model, represents spheres assumes instant hygroscopic equilibrium. Overall, this study indicates that effectiveness filtration processes likely depends strongly properties at low contents within range.