Structure and performance of regenerated fluid catalytic cracking catalysts
Two kinds of regenerated fluid catalytic cracking catalysts with carbon mass fraction of 0.25％and 0.04％were prepared by using a fixed bed de-vice.The catalysts were characterized by X-ray diffractometer,N2 adsorption,scanning electron mi-croscope.The influence of the regeneration process on catalyst structure and the performance of regener-ated catalysts were studied.The results showed that the regeneration process didn't affect the molecular sieve structure in the catalyst;the main reason for catalyst deactivation was that coke blocked the pores and covered the weak acidic active sites.The regen-eration process removed the coke and the catalyst activity was restored;the lower the carbon mass fraction of the catalyst,the higher the feed oil con-version rate,the lower the thermal cracking index;the feed oil conversion rate on the regenerated cata-lyst could reach up to 83.68％,and the thermal cracking index was only 0.19.
fluid catalytic crackingcatalystre-generationcokethermal cracking index
万方数据
维普
