Thermofor catalytic cracking

For the purposes of this illustrative example, we wish to calculate the combined and effective diffusivities of cumene in a mixture of benzene and cumene at 1 atm total pressure and 510 °C within the pores of a typical TCC (Thermofor Catalytic Cracking) catalyst bead. For our present purposes, the approximation to the combined diffusivity given by equation 12.2.8 will be sufficient because we will see that the Knudsen diffusion term is the dominant factor in determining the combined diffusivity. 

Airlift Thermofor Catalytic Cracking Also called Airlift TCC. A continuous catalytic process for converting heavy petroleum fractions to lighter ones. The catalyst granules are moved continuously by a stream of air. Developed by Mobil Oil Corp., United States, and first operated in 1950. See also Thermofor. 

A REACTION ENGINEERING CASE HISTORY COKE BURNING IN THERMOFOR CATALYTIC CRACKING REGENERATORS... 

C. D. Prater, J. Wei, V. W. Weekman, Jr., and B. Gross, A Reaction Engineering Case History Coke Burning in Thermofor Catalytic Cracking Regenerators Costei D. Denson, Stripping Operations in Polymer Processing Robert C. Reid, Rapid Phase Transitions from Liquid to Vapor John H. Seinfeld, Atmospheric Diffusion Theory... 

Some of the principles used in Thermofor catalytic cracking have been applied to a coking operation. Coke itself, instead of catalyst, is the solid circulated. The coke is heated in the regenerator of the unit and more coke is deposited on the hot moving solid in the reactor of the unit. Appropriate proportions of the coke are removed continuously as the process proceeds (84). 

Airlift Thermofor catalytic cracking, liq. vol. % Fluid catalytic cracking, liq. vol. % Delayed coking, liq. vol. %... 

Airlift Thermofor catalytic cracking a moving-bed continuous catalytic process for conversion of heavy gas oils into lighter products the catalyst is moved by a stream of air. 

Thermofor catalytic cracking a continuous, moving-bed catalytic cracking process. 

Other types of operations where metals passivation has been successful are FCC units that operate to maximize distillate production and Thermofor Catalytic Cracking Units (TCCU) A refiner operating a FCCU at conversions less than 60 liquid volume percent of the oil feed observed a 56% decrease in hydrogen production with metals passivation. Yields of liquid products increased. In a TCCU application, injection of antimony decreased yield of coke, as evidenced by a 70°F decrease in regeneration temperature, and decreased the H2/CH4 mole ratio in the off gas 13.7%. 

Figure 10-28 Thermofor catalytic cracking (ICC) unit. [From V. Weekman,...

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