Regeneration of Coked Zeolite from PMMA Cracking Process by Ozonation

Fig. 9. Photos of pellets (a) before and (b, c) after regeneration (Q_G = 12.7 l/h, C_O3,in =48 g/m³, TOS = 1 h): top pictures: T_outlet = 95 ^◦C, bottom pictures: T_outlet = 140 ^◦C.

Fig. 10. Distribution of acid sites for fresh zeolite, coked and regenerated samples A: (a) influence of regeneration duration, (b) influence of regeneration temperature.