CHEMICAL ENGINEERING
PAPER-I
Section A
(a) Fluid and Particle Dynamics
Viscosity of fluids. Laminar and turbulent flows. Equation of
continuity and Navier- Stokes equition-Bernoulli’s theorem. Flow meters. Fluid
drag and pressure drop due to friction, Reynold’s Number and friction factor -
effect of pipe roughness. Economic pipe diameter. Pumps, water, air/steam jet
ejectors, compressors, blowers and fans. Agitation and mixing of liquids.
Mixing of solids and pastes. Crushing and Grinding - principles and equipment.
Rittinger’s and Bond’s laws. Filtration and filtration equipment.
Fluid-particle mechanics - free and hindered settling. Fluidisation and minimum
fluidization velocity, concepts of compressible and incompressible flow. Transport
of Solids.
(b) Mass Transfer
Molecular diffusion coefficients, First and second law and
diffusion, mass transfer coefficients, film and penetration theories of mass
transfer. Distillation, simple distillation, relative volatility, fractional distillation,
plate and packed columns for distillation. Calculation of theoretical number of
plates. Liquid-liquid equilibria. Extraction - theory and practice; Design of
gas-absorption columns. Drying. Humidification, dehumidification.
Crystallisation. Design of equipment.
(c) Heat Taransfer
Conduction, thermal conductivity, extended surface heat transfer. Convection
- free and forced. Heat transfer coefficients - Nusselt Number. LMTD and effectiveness.
NTU methods for the design of Double Pipe and Shell & Tube Heat Exchangers.
Analogy between heat and momentum transfer. Boiling and condensation heat
transfer. Single and multiple-effect evaporators. Rediation - Stefan-Boltzman
Law, emissivity and absorptivity. Calculation of heat load of a furnace. Solar
heaters.
Section B
(d) Noval Separation Processes
Equilibrium separation processes - ion-exchange, osmosis,
electro-dialysis, reverse osmosis, ultra-filtration and other membrane
processes. Molecular distillation. Super critical fluid extraction.
(e) Process Equipment Design
Fractors affecting vessel design criteria - Cost considerations.
Design of storage vessels-vertical, horizontal spherical, underground tanks for
atmospheric and higher pressure. Design of closures flat and eliptical head.
Design of supports. Materials of construction-characteristics and selection.
(f) Process Dynamics and Control
Measuring instruments for process variables like level, pressure,
flow, temperature pH and concentration with indication in
visual/pneumatic/analog/digital signal forms. Control variable, manipulative
variable and load variables. Linear control theory- Laplace, transforms. PID
controllers. Block diagram represenation transient and frequency response,
stability of closed loop system. Advanced control strategies. Computer based
process control.
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