Drying and Impregnation of Wood with Propiconazole Using Supercritical Carbon Dioxide

The process of wood drying is studied in supercritical (SC) CO 2 and SC-CO 2 containing 5 vol % ethanol at temperatures of 323, 343, and 353 K and pressures of 10, 20, and 30 MPa. It is established that 40–87% of moisture is removed from wood in the first cycle of drying. An increase in the duration...

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Published inRussian journal of physical chemistry. B Vol. 11; no. 8; pp. 1223 - 1230
Main Authors Gabitov, R. F., Khairutdinov, V. F., Gumerov, F. M., Gabitov, F. R., Zaripov, Z. I., Gaifullina, R., Farakhov, M. I.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.12.2017
Springer Nature B.V
Subjects
Carbon dioxide
Chemistry
Chemistry and Materials Science
Drying
Ethanol
Impregnation
Physical Chemistry
solubility
wood
propiconazole
supercritical CO
drying
impregnation
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Summary:The process of wood drying is studied in supercritical (SC) CO 2 and SC-CO 2 containing 5 vol % ethanol at temperatures of 323, 343, and 353 K and pressures of 10, 20, and 30 MPa. It is established that 40–87% of moisture is removed from wood in the first cycle of drying. An increase in the duration of the decompression stage of the drying process decreases the number of cracks in the wood samples. The solubility of propiconazole is studied in SC-CO 2 at 323, 343, and 353 K in the pressure range of 10–30 MPa using a dynamic method. Rather high saturation concentrations of (3–5) × 10 –3 mol/mol CO 2 are obtained, which indicates the potential benefits of using SC-CO 2 as a solvent in wood impregnation with propiconazole. Continuous impregnation is achieved when impregnating wood with propiconazole from SC-CO 2 . The impregnation efficiency increases with increasing pressure and duration of the process.
ISSN:1990-7931
1990-7923
DOI:10.1134/S1990793117080048