Сверхкритические флюиды. Теория и практика
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2017, N1, pp. 29-40

R.F. Gabitov, V.F. Khairutdinov, F.M. Gumerov, F.R. Gabitov, Z.I. Zaripov, R. Gaifullina, M.I. Farakhov

Wood Drying and Impregnation with Propiconazole Using Supercritical Carbon Dioxide

Drying of wood in the supercritical (SC) CO2 and SC-CO2 added with ethanol (5%) media at 323, 343 and 353 K and 10, 20 and 30 MPa is studied. During the first drying cycle 40—87% of the initial moisture can be removed from the material. The number of cracks in the wood can be reduced by prolongation of the decompression stage of the drying process. Solubility of propiconazole in SC-CO2 is studied using a dynamic method. Its high saturation concentrations — (3—5)⋅10-3 mole per mole of СО2 — indicate that potentially SC-CO2 can be considered as a candidate solvent for impregnation of wood with propiconazole. It is demonstrated that through impregnation of wood samples can be achieved, and the efficiency of impregnation increases at increased duration of the process.

Key words: propiconazole, supercritical CO2, solubility, wood, drying, impregnation

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