Restrictions on the rate of absorption when evaluating sorption isotherms obtained using a micro-calorimetric technique
(2001) In Journal of Building Physics 25(2). p.85-100- Abstract
- One interestingway of measuring sorption isotherms and heats of sorption is the newly developed micro-calorimetric method. It turns out, however, that the adsorption kinetics must be proven to be rapid enough to fulfill the assumptions behind the theory for the determination of the isotherm to be valid. Here, the lower limit of the accepted rate of adsorption will be analyzed by making calculations of the diffusion behavior in the calorimetric vessel. The evaluation of the adsorption isotherms is based on assumptions of a quasi-static nature. If the adsorption kinetics are slow the behavior in the calorimeter will turn to a more or less transient process. When the heat of adsorption is of interest and the sorption isotherm and kinetics of... (More)
- One interestingway of measuring sorption isotherms and heats of sorption is the newly developed micro-calorimetric method. It turns out, however, that the adsorption kinetics must be proven to be rapid enough to fulfill the assumptions behind the theory for the determination of the isotherm to be valid. Here, the lower limit of the accepted rate of adsorption will be analyzed by making calculations of the diffusion behavior in the calorimetric vessel. The evaluation of the adsorption isotherms is based on assumptions of a quasi-static nature. If the adsorption kinetics are slow the behavior in the calorimeter will turn to a more or less transient process. When the heat of adsorption is of interest and the sorption isotherm and kinetics of sorption can be determined by other methods, compensation for the transient effects can be made. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1529111
- author
- Johannesson, Björn LU
- organization
- publishing date
- 2001
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Building Physics
- volume
- 25
- issue
- 2
- pages
- 85 - 100
- publisher
- SAGE Publications
- external identifiers
-
- scopus:0035492335
- ISSN
- 1744-2583
- DOI
- 10.1106/KA2X-NAWR-PQWD-V4V0
- language
- English
- LU publication?
- yes
- id
- 3b6f1452-6c10-43c9-bf9d-435b80488935 (old id 1529111)
- date added to LUP
- 2016-04-04 07:40:35
- date last changed
- 2022-01-29 02:27:27
@article{3b6f1452-6c10-43c9-bf9d-435b80488935,
abstract = {{One interestingway of measuring sorption isotherms and heats of sorption is the newly developed micro-calorimetric method. It turns out, however, that the adsorption kinetics must be proven to be rapid enough to fulfill the assumptions behind the theory for the determination of the isotherm to be valid. Here, the lower limit of the accepted rate of adsorption will be analyzed by making calculations of the diffusion behavior in the calorimetric vessel. The evaluation of the adsorption isotherms is based on assumptions of a quasi-static nature. If the adsorption kinetics are slow the behavior in the calorimeter will turn to a more or less transient process. When the heat of adsorption is of interest and the sorption isotherm and kinetics of sorption can be determined by other methods, compensation for the transient effects can be made.}},
author = {{Johannesson, Björn}},
issn = {{1744-2583}},
language = {{eng}},
number = {{2}},
pages = {{85--100}},
publisher = {{SAGE Publications}},
series = {{Journal of Building Physics}},
title = {{Restrictions on the rate of absorption when evaluating sorption isotherms obtained using a micro-calorimetric technique}},
url = {{http://dx.doi.org/10.1106/KA2X-NAWR-PQWD-V4V0}},
doi = {{10.1106/KA2X-NAWR-PQWD-V4V0}},
volume = {{25}},
year = {{2001}},
}