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