Gas permeability of expanded graphite-metallic salt composite

Authors
Citation
Jh. Han et Kh. Lee, Gas permeability of expanded graphite-metallic salt composite, APPL TH ENG, 21(4), 2001, pp. 453-463
Citations number
13
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Mechanical Engineering
Journal title
APPLIED THERMAL ENGINEERING
ISSN journal
1359-4311 → ACNP
Volume
21
Issue
4
Year of publication
2001
Pages
453 - 463
Database
ISI
SICI code
1359-4311(200103)21:4<453:GPOEGS>2.0.ZU;2-X
Abstract
The expanded graphite-metallic salt composite was manufactured by impregnat ion of metallic salt solution into porous graphite matrix, followed by vacu um drying. The gas permeability was measured by using Darcy's law in ammoni a atmosphere for the graphite-CaCl2. nNH(3) (n = 8, 4, 2), MnCl2. nNH(3) (n = 6, 2) and BaCl2. nNH(3) (n = 8, 0) composites. The gas permeability was in the range of 5.0 x 10(-16)-10(-12) m(2) depending on the reaction pair, bulk density and weight fraction of the graphite powder. Results show that as the value of n increases, the gas permeability diminishes remarkably due to a reduction of the total porosity. The values of gas permeability obtai ned in this work are useful in the mass transfer analysis and dynamic simul ation of thermochemical reactors for chemical heat pumps. (C) 2000 Publishe d by Elsevier Science Ltd.