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利用 XRD、SEM、TEM 及表面酸性测定等手段研究了 Cr_2O_3/Al_2O_3新、废催化剂在物化结构及表面酸性上存在的差异,论证了工业生产中 Cr_2O_3/Al_2O_3催化剂的失活是由其微观结构变化和表面酸性下降引起的。
The differences of physicochemical structure and surface acidity of Cr_2O_3 / Al_2O_3 new and spent catalysts were studied by means of XRD, SEM, TEM and surface acidity determination. It is demonstrated that the deactivation of Cr_2O_3 / Al_2O_3 catalyst in industrial production is caused by its microstructure change And surface acidity caused by the decline.