Silica-alumina, coke deposits gasification kinetics

Gasification Kinetics of Coke Deposited on Silica-Alumina. Within the temperature range 1400 to 1600°F and in the presence of excess steam, the gasification reaction of coke deposited on the silica-alumina cracking catalyst closely followed first-order kinetics with respect to unreacted carbon (Figure 1). First-order rate constants were calculated from the slopes of these plots (Table III), and yielded an activation energy of 55.5 Kcal/mole. 

Figure 1. Kinetics of steam gasification of coke deposited on silica-alumina, for reaction temperatures of 1400°F (O), 1500°F ( Z ), 1550°F (A), and 1600°F (V).

Figure 3. Kinetics of steam gasification at 1500°F of coke deposited on mont-morillonite (AJ, silica-alumina (Al, American Cyanamid alumina ( ,), Catapal alumina, Run 58 (9), Catapal alumina, Run 56 (O), and fresh bauxite flj.

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