Effect of steam pretreatment on wood moisture content and characteristics of vacuum drying

Autor:	Fei Yang, Song-lin Yi, Fan Li, Yiqing Peng
Rok vydání:	2012
Předmět:	Materials science Fiber saturation point Ecology Steam temperature technology industry and agriculture food and beverages Forestry Wood drying Pulp and paper industry complex mixtures humanities Vacuum drying Drying time Wood moisture Water content
Zdroj:	Forestry Studies in China. 14:315-319
ISSN:	1993-0372 1008-1321
DOI:	10.1007/s11632-012-0408-7
Popis:	The effects of high temperature steam pretreatment on the change in wood moisture content (MC) and characteristics of vacuum drying were investigated in this study. Poplar and manchurian walnut woods were pretreated with high temperature steam at 100°C and 140°C, prior to vacuum drying. A comparison of the characteristics of vacuum drying between steam pretreated wood and untreated wood was carried out. The results show that during steam pretreatment, the MC of wood decreased within a few hours. The reduction of MC varied with the temperature; the higher the temperature, the faster the MC dropped. During the vacuum drying stage, the rates of drying of pretreated samples were higher than those of untreated samples when MC was below the fiber saturation point. Furthermore, the total drying time of samples treated at a steam temperature of 140°C was lower than that of untreated samples. Therefore, a vacuum procedure after steam pretreatment can effectively shorten the drying time when drying wood.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2872501017592ed0be53062edb489a7a https://doi.org/10.1007/s11632-012-0408-7 Zobrazit plný text záznamu Full text from SpringerLink