Journal
JOURNAL OF SUPERCRITICAL FLUIDS
Volume 204, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.supflu.2023.106121
Keywords
Moisture distribution; Moisture transfer; Shrinkage; Drying stress; Supercritical CO 2 dewatering; Bamboo strip
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This study compared the effects of supercritical carbon dioxide dewatering (SCD) and conventional kiln drying (CKD) at a temperature of 55 degrees C on the dewatering rate, moisture transfer and distribution, shrinkage, and stress characteristics of bamboo strips. The results showed that SCD had a faster dewatering rate and lower shrinkage compared to CKD, but was less effective in reducing drying stress in bamboo.
The aim of this study was to compare the dewatering rate, timing, moisture transfer and distribution, shrinkage, and stress characteristics of bamboo strips using supercritical carbon dioxide dewatering (SCD) and conventional kiln drying (CKD) at a temperature of 55 degrees C. SCD showed a faster dewatering rate than CKD, which increased with decreasing moisture content (MC) of the bamboo strip. During a dewatering cycle, approximately 82% of the water was removed during CO2 decompression and within the initial five minutes of CO2 emission. Comparison of MC showed that SCD did not exhibit any significant differences in the longitudinal direction, while CKD showed lower MC at the end locations of the bamboo strips. Additionally, SCD significantly decreased shrinkage in both the tangential (71%) and radial (52%) directions compared to CKD. However, SCD was less effective in reducing drying stress in bamboo.
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