Water vapor sorption and diffusivity in bark
(2016) In Drying Technology 34(2). p.150-160- Abstract
- Physical properties of importance in drying processes have been compiled for bark, including spruce, pine, and birch in Sweden. Water vapor sorption isotherms were determined for the bark of these trees. At 95% relative humidity and 25 degrees C, outer birch bark reached a moisture ratio (kg water/kg dry mass) of 5%, whereas inner birch bark, spruce bark, and pine bark reached moisture ratios of 21, 28, and 25%, respectively. The transverse water vapor diffusivity in samples of spruce bark, pine bark, inner birch bark, and outer birch bark were determined to be 1.1-1.710(-6), 2.2-9.210(-7), 1.5-2.610(-6), and 4.3-1310(-8)m(2)/s, respectively. The in-plane diffusivity was of the same magnitude as the transverse diffusivity in inner birch... (More)
- Physical properties of importance in drying processes have been compiled for bark, including spruce, pine, and birch in Sweden. Water vapor sorption isotherms were determined for the bark of these trees. At 95% relative humidity and 25 degrees C, outer birch bark reached a moisture ratio (kg water/kg dry mass) of 5%, whereas inner birch bark, spruce bark, and pine bark reached moisture ratios of 21, 28, and 25%, respectively. The transverse water vapor diffusivity in samples of spruce bark, pine bark, inner birch bark, and outer birch bark were determined to be 1.1-1.710(-6), 2.2-9.210(-7), 1.5-2.610(-6), and 4.3-1310(-8)m(2)/s, respectively. The in-plane diffusivity was of the same magnitude as the transverse diffusivity in inner birch bark, whereas in outer birch bark the in-plane diffusivity was several times higher than the transverse diffusivity. These data can be used to model the drying behavior and can thus aid in the design of efficient bark drying processes. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/8556923
- author
- Holmberg, André LU ; Wadsö, Lars LU and Stenström, Stig LU
- organization
- publishing date
- 2016
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Bark, drying, physical properties, sorption isotherms, vapor diffusion
- in
- Drying Technology
- volume
- 34
- issue
- 2
- pages
- 150 - 160
- publisher
- TAPPI
- external identifiers
-
- wos:000365895200002
- scopus:84949324090
- ISSN
- 1532-2300
- DOI
- 10.1080/07373937.2015.1023310
- language
- English
- LU publication?
- yes
- id
- f25112ce-46e3-4e4f-b114-9b5baf027fd6 (old id 8556923)
- date added to LUP
- 2016-04-01 11:05:57
- date last changed
- 2025-04-04 14:06:26
@article{f25112ce-46e3-4e4f-b114-9b5baf027fd6,
abstract = {{Physical properties of importance in drying processes have been compiled for bark, including spruce, pine, and birch in Sweden. Water vapor sorption isotherms were determined for the bark of these trees. At 95% relative humidity and 25 degrees C, outer birch bark reached a moisture ratio (kg water/kg dry mass) of 5%, whereas inner birch bark, spruce bark, and pine bark reached moisture ratios of 21, 28, and 25%, respectively. The transverse water vapor diffusivity in samples of spruce bark, pine bark, inner birch bark, and outer birch bark were determined to be 1.1-1.710(-6), 2.2-9.210(-7), 1.5-2.610(-6), and 4.3-1310(-8)m(2)/s, respectively. The in-plane diffusivity was of the same magnitude as the transverse diffusivity in inner birch bark, whereas in outer birch bark the in-plane diffusivity was several times higher than the transverse diffusivity. These data can be used to model the drying behavior and can thus aid in the design of efficient bark drying processes.}},
author = {{Holmberg, André and Wadsö, Lars and Stenström, Stig}},
issn = {{1532-2300}},
keywords = {{Bark; drying; physical properties; sorption isotherms; vapor diffusion}},
language = {{eng}},
number = {{2}},
pages = {{150--160}},
publisher = {{TAPPI}},
series = {{Drying Technology}},
title = {{Water vapor sorption and diffusivity in bark}},
url = {{http://dx.doi.org/10.1080/07373937.2015.1023310}},
doi = {{10.1080/07373937.2015.1023310}},
volume = {{34}},
year = {{2016}},
}