Is it possible to find a non-isothermal steady-state continuous stirred tank reactor and a non-isothermal steady-state plug flow reactor?

A CSTR is a reactor in which the reactants are thoroughly mixed before and during the reaction. This ensures that the concentration of the reactants and products, and the temperature, are uniform throughout the reactor at any given time. A steady-state CSTR has constant reactant flow rates, product flow rates, and temperature. Since a CSTR is well mixed and the temperature is uniform throughout, a non-isothermal CSTR would mean that the temperature is not constant with time, but it is still uniform spatially.

Yes, it is possible to find a non-isothermal steady-state CSTR. In this type of reactor, there might be some energy source present, such as a heating or cooling system, which can maintain the temperature at a certain level. As far as the steady-state condition is maintained, the reactor properties (concentration and temperature) will not change with time. Therefore, a non-isothermal steady-state CSTR can exist with a properly designed heating system or cooling system.

A PFR is a type of reactor in which the reactants flow through a tube, and the reaction occurs along the tube's length. In a PFR, the concentration of reactants and products, as well as the temperature, vary along the length of the reactor. A steady-state PFR means that the properties along the reactor (concentration, temperature, etc.) do not change with time.

Yes, it is possible to find a non-isothermal steady-state PFR. In this type of reactor, the temperature can vary spatially along the tube length due to factors such as heat generated by the reaction or heat loss to the environment. Various configurations can be employed to maintain this non-isothermal steady-state condition, such as heat exchangers or jacketed tubes. Thus, a non-isothermal steady-state PFR can exist if the reactor is designed and operated carefully to maintain the steady-state condition. In conclusion, it is possible to find a non-isothermal steady-state continuous stirred tank reactor and a non-isothermal steady-state plug flow reactor. The key is to properly design the reactors and their heating or cooling systems to ensure that the steady-state condition is maintained, even though the temperature might vary spatially or with time.