Moisture transfer and drying stress of eucalyptus wood during supercritical CO2 (ScCO2) dewatering and ScCO2 combined oven drying

Supercritical CO2 (ScCO2) dewatering is a lumen water expulsion process, in which cycled between atmospheric pressure and supercritical phase results fast of free water. In this study, specimens 100 mm length Eucalyptus exserta F.V. Muell. wood were dewatered using ScCO2, then the un-dewatered dried oven at °C to investigate moisture transfer drying stress. The ScCO2 was very fast. When content (MC) over 40%, MC distribution gradient after different. showed ring contour distribution, but higher one side lower opposite; great middle small end part wood, roughly consistent. migration rates along fiber transverse directions similar; however, rate faster directions. distributions similar 30% MC. reduced residual stress, it affected stress development subsequent drying.