日本ゼオライト学会　刊行物 Publication of Japan Zeolite Association

The following four topics are described according to the authors' past studies, i. e., 1) Isothermal adsorption and desorption of carbon dioxide onto 4A, 5A and 13X zeolite particle bed to analyse adsorption processes by use of redioisotopic exchange. Results showed that the rate-determining step of intraparticle diffusion changed depending on the size of micropores of zeolite particles in comparison to that of the carbon dioxide. 2) Nonisothermal adsorption behavior of carbon dixide in 5A zeolite bed was well described by J.W.Carter. Real feature of nonisothermal fixed bed adsorption was observed by a double column device, with a plateau in the adsorption breakthrough curves. 3) Equilibrium and kinetic studies of adsorption of organic vapor on High Silica Zeolite bed were conducted to show intraparticle diffusion is mostly controlled by that in macropore (interaggregate spacings). 4) Binary adsorption of some azeotropic mixture on Y-type High Silica Zeolite was studied for n-butanol-p-xylene mixture and for other systems. Turnover of the order of breakthrough occured and an approximate analysis of breakthrough curves was done for a certain concentration range based on a simple method.