An elementary reaction, A + 2B C, will be done in an isothermal PFR. 1.1...

 

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An elementary reaction, A + 2B → C, will be done in an isothermal PFR. 1.1 What is the rate of reaction? (2) 1.2 What is the 8 for this reaction? (2) 1.3 Express the rate of reaction as a function of conversion for a gas-phase flow system. The feed consists of A and B in a 1:1 molar ratio. List your assumptions. (20) 1.4 For a PFR, express the reactor volume, V, as an equation in integral form. (5) 1.5 The feed flowrate of A is 80 mols, the desired conversion is 50%, the rate constant is 0.4 m.mol2.s¹ and the initial concentration of A is 2 mol.m³. What is the required reactor volume? (4) 1.6 In order to obtain a higher conversion, a stoichiometric feed is used (i.e. A:B = 1:2). Express the rate of reaction as a function of conversion for a gas-phase flow system. Neglect the pressure drop in the reactor. (10) 1.7 Explain how you would evaluate the integral that you obtained in 1.6 to find the volume of the reactor required to give a conversion of 70%. Justify your answer. (7) An elementary reaction, A + 2B → C, will be done in an isothermal PFR. 1.1 What is the rate of reaction? (2) 1.2 What is the 8 for this reaction? (2) 1.3 Express the rate of reaction as a function of conversion for a gas-phase flow system. The feed consists of A and B in a 1:1 molar ratio. List your assumptions. (20) 1.4 For a PFR, express the reactor volume, V, as an equation in integral form. (5) 1.5 The feed flowrate of A is 80 mols, the desired conversion is 50%, the rate constant is 0.4 m.mol2.s¹ and the initial concentration of A is 2 mol.m³. What is the required reactor volume? (4) 1.6 In order to obtain a higher conversion, a stoichiometric feed is used (i.e. A:B = 1:2). Express the rate of reaction as a function of conversion for a gas-phase flow system. Neglect the pressure drop in the reactor. (10) 1.7 Explain how you would evaluate the integral that you obtained in 1.6 to find the volume of the reactor required to give a conversion of 70%. Justify your answer. (7)

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