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Determination of external mass transfer coefficients in dynamic sorption (DVS) measurements

Thorell, Alva LU and Wadsö, Lars LU (2017) In Drying Technology
Abstract
A sorption balance is an instrument used to measure vapor uptake in a sample at controlled temperature and relative humidity. It is most commonly used to determine equilibrium values (sorption isotherms), but is also used for kinetic measurements of transport coefficients. Such measurements can be affected by the external mass transfer resistance in the gas phase around the sample. This paper presents a method to determine the external mass transfer coefficient for a given flow geometry using a water saturated sample, including corrections for temperature changes from evaporative cooling, which is found to have considerable effect on the calculated constant.
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
DVS, kinetics, mass transfer coefficient, mass transfer resistance, sorption balance
in
Drying Technology
publisher
TAPPI
external identifiers
  • scopus:85026855316
ISSN
1532-2300
language
English
LU publication?
yes
id
6638c6d4-3aee-48d4-98c2-e2abb464c137
date added to LUP
2017-08-17 12:05:26
date last changed
2017-08-20 05:15:10
@article{6638c6d4-3aee-48d4-98c2-e2abb464c137,
  abstract     = {A sorption balance is an instrument used to measure vapor uptake in a sample at controlled temperature and relative humidity. It is most commonly used to determine equilibrium values (sorption isotherms), but is also used for kinetic measurements of transport coefficients. Such measurements can be affected by the external mass transfer resistance in the gas phase around the sample. This paper presents a method to determine the external mass transfer coefficient for a given flow geometry using a water saturated sample, including corrections for temperature changes from evaporative cooling, which is found to have considerable effect on the calculated constant.},
  author       = {Thorell, Alva and Wadsö, Lars},
  issn         = {1532-2300},
  keyword      = {DVS,kinetics,mass transfer coefficient,mass transfer resistance,sorption balance},
  language     = {eng},
  month        = {06},
  publisher    = {TAPPI},
  series       = {Drying Technology},
  title        = {Determination of external mass transfer coefficients in dynamic sorption (DVS) measurements},
  year         = {2017},
}