Adiabatic Temperature Rise-Exothermic Rxn

[dcguffey]

I know the way to calculate the adiabatic temperature rise: Heat_of_Rxn/Cp. However, I have run into a bit of a sticky wicket. I need to calculate ATR of a fluid bed reactor with a large amount of metal catalyst. The heat capacity of the liquid and the catalyst are significantly different. Any advice on how to proceed. The heat of reaction is around 2000 kJ/kg of product and the reaction mix has a heat capacity of around 4 kJ/kg?°C.

 

[dcguffey]

Forgot to mention that the reaction mix flowrate through the reactor is around 10,000 kg/h and the catalyst mass (stays in the reactor as expanded bed) is around 75,000 kg.

 

[Compositepro]

In that case (I was waiting for more info), the catalyst mass will affect initial rate of heat rise but will not affect the equilibrium temperature rise. It will behave just like the mass of the reactor.

 

[dcguffey]

Thanks for that. It is hard for me to get my head around that much "static" mass not influencing the final temperature. But it impacts the "rate" not the final number. Thanks again!