Abstract: A process for separation of carbon dioxide that is present in a gas mixture by pressure-modulated adsorption (PSA) that comprises at least the following stages is described: a) Bringing said mixture that is to be purified into contact with at least one adsorbent that is formed by a porous carbon material that comprises at least 70% by weight of carbon, whereby said material has a specific surface area that is larger than 1,500 m2/g, a micropore volume of between 0.5 and 2 cm3/g of adsorbent and between 0.5 and 0.8 cm3/cm3 of adsorbent, b) The adsorption of carbon dioxide on said adsorbent at a total pressure P1, c) The desorption of at least a portion of CO2 that is adsorbed in said stage b) so as to produce a CO2-enriched stream at a total pressure P2 that is less than P1.

Abstract: The present method of manufacturing a ceramic composite material, composed of matrix and reinforcing materials and an intermediate weak interfice material, creates a composite material particuarly intended for use at temperatures above 1400° C. and in an oxidizing environment. The matrix and reinforcing materials consist of the same or different ceramic oxides having a melting point above 1600° C. The interface material provides in combination with the matrix and reinforcing materials a stress field liable to micro aciding. The reinforcing material is immersed into a powder slurry containing carbon (C) and ZrO2 so as to be coated thereby and then dried. After which, the thus created composite material is subjected to green forming and densifying steps. Finally, the composite material undergoes a heat-treatment in air leaving a porous structure of the interface material.