OXYDO-REDUCING LOOP PROCESS USING AS OXYDO-REDUCTIVE MASS A COMPOSITION BASED ON CERIUM OXIDES, A RARE EARTH OTHER THAN CERIUM AND, IF POSSIBLE, ZIRCONIUM

摘要

The invention relates to a looped oxidation-reduction method which is characterized in that a mass comprising a composition based on cerium oxide and which consists essentially of oxide is used as the redox mass. of cerium and at least one oxide of another rare earth and has a surface area of at least 20 m / g after calcination at 1000 ° C for 5 hours; or which is based on cerium oxide, zirconium oxide and at least one oxide of a rare earth other than cerium.