Reference no: EM133046020

M3H824741 Chemical Engineering Thermodynamics and Reaction Kinetics - National University of Science and Technology

Aim - To provide an understanding of the underlying principles of Thermodynamics and reaction kinetics required for a process engineer.

Learning Outcome 1: Explain and analyse isothermal, isobaric, isochoric, isentropic and cyclic processes for an ideal gas.

Learning Outcome 2: Analyse steam power and refrigeration cycles.

Learning Outcome 3: Analyse the reaction kinetics and behaviour of reactors under various operating conditions to find the rate expression.

Learning Outcome 4: Explain suitable applications of chemical reactors relevant to process industries and analyse the appropriate criteria for reactor selection.

Task

Question 1. (a) Nitrogen gas is confined in a cylinder and the pressure of the gas is maintained by a weight placed on the piston. The mass of the piston and the weight together is 50 kg. The acceleration due to gravity is 9.81 m/s2 and the atmospheric pressure is 1.01325 bar. Assume frictionless piston. Determine the following :
i. The force exerted by the atmosphere
ii. The force exerted by the piston and the weight on the gas if the piston is 100 mm in diameter.
iii. Total force acting on the gas.
iv. Pressure of the gas
v. If the gas is allowed to expand pushing up the piston and weight by 400 mm, what is the work done by the gas in J.

(b) Can thermodynamics help you to determine the maximum yield of a specified product in a chemical reaction? If so, justify with two examples?

Question 2. Consider a thermodynamical process in which heat is transmitted to 10 kg of air which is initially at 100 kPa and 27 deg cel until its temperature reaches 327 deg cel. The system undergoes constant volume and constant pressure process. Assume that air is an ideal gas for which the PVT relationship is PV = nRT, where n is the number of moles of the gas and R is the ideal gas constant. R = 8.314 kJ/kmol K. Take Cp = 29.099 kJ/kmol K, Cv = 20.785 kJ/kmol K and molecular weight of air = 29. Determine the Changes in internal energy, the change in enthalpy, the heat supplied and the work done for each processes.

Question 3. The key concept of thermodynamics is that heat is a form of energy corresponding to a definite amount of mechanical work. Choose any equipment or unit in the process plant which undergoes the thermodynamics changes. Highlight the (1) importance, (2) thermodynamically features of the unit and (3) define a numerical problem along with appropriate solution with suitable assumption. (1500 words).

Question 4. Ideal reactors are model systems for which the transport and mixing processes are exactly defined. Originate the performance equation of an ideal reactor with suitable assumptions and theory of approach. Also compare the different types of ideal reactors and suggest a best one suitable for the process of hydrogenation of oil at a pressure of 136.8 kPa and a temperature of 180 deg cel.

Attachment:- Chemical Engineering Thermodynamics.rar