HTGR Knowledge Base

Conference Article: Behavior of gas desorption and gas permeability of carbon materials

Okada, M.; Sogabe, T. (Toyo Tanso Co., Ltd, Mitoyo, Kagawa (Japan))

Abstract

Carbon materials rather easily adsorb and desorb gases such as hydrocarbons, H2, H2O, CO and alcohols. It is very important to study the behaviour of gas desorption and gas permeability of carbon materials, especially when they are used in a vacuum vessel or a closed system. Gas desorption was studied by using Thermal Desorption Spectroscopy. Gas desorptions from isotropic graphites, Felt-C/C and B4C graphite materials were measured. Thermal desorption spectra were obtained from IG-11, IG-110 and IG-110U graphites with a total ash content of 400 ppm, 10 ppm and 2 ppm, respectively.

view the full text of this article (10 pages, format: PDF, size= 1096kB)

key words: ash content; carbon; desorption; emission spectroscopy; gases; graphite; materials testing; permeability; reactor components
Reference:
Specialists' meeting on the status of graphite development for gas cooled reactors. Tokai, Ibaraki (Japan). 9-12 Sep 1991
International Atomic Energy Agency, Vienna (Austria)
IAEA-TECDOC--690, pp:149-158