Problem 1

Consider the following reaction sequence.

a. What is (are) the active intermediate?

b. Provide a rate law for the product.

Problem 2

A second order reaction where ??→?? occurs in a CSTR under isothermal conditions. The exothermic reaction occurs at 175°C. A heat exchange fluid at 25°C is available.

The temperature of the reactants entering the reactor is 50°C and the heat of reaction is -15000 J/mol. The reaction rate constant is 0.005 m³/(mol/s). The heat capacity of A is 150 J/(mol/K) and its fractional conversion is 75%. The initial molar concentration of A is 300 mol/m³.

a. What is the initial molar flow rate of A if the volume is 10 m³?

b. What is the heat transfer area if the heat transfer coefficient is 1.5 KJ/(m².°C.h)?

Problem 3

Discussion Questions. Be thorough. Write your answers.

a. Explain the design of a semi-batch reactor. What is the main advantage of using a semibatch reactor?

b. Explain the importance of porous catalyst.