Course Details

Subject {L-T-P / C} : CH4112 : Fluidization Engineering {3-0-0 / 3}
Subject Nature : Theory
Coordinator : Prof. Hara Mohan Jena

Syllabus

Introduction to fluidization, types of fluidization, fluidization phenomena, historical development and industrial applications, Gross behaviour of fluidized beds, Minimum fluidizing velocity and pressure drops, Voidage, transport disengaging height, Distributor design, pressure drop requirement though distributor, behaviour in gas entry region, Bubbles in dense beds, Davidson Model, stream of bubbles, bubbling bed models, Emulsion phase, Turn-over rate of solids, residence time distribution diffusion model of solids movement, interchange coefficient into and out of wake, Entrainment and elutriation from fluidized beds, free board behaviour and entrainment from tall vessels, high velocity fluidization, turbulent and fast fluidized beds and associated pressure drop, Residence time distribution and size distribution of solids in fluidized beds, mixing and segregation behaviour, particles of changing size Circulation rates of solids, flow of high and low bulk density mixtures, Design for catalytic reactors, Design for noncatalytic gas-solid reactors, gas-liquid-solid fluidization, Semi-fluidized beds

Course Objectives

  1. To make students understand the wider application of Fluidization Engineering in chemical, petroleum, and petrochemical engineering in terms of reactors, combustors and other process units
  2. To have better understanding of fluidization phenomena, analyzing the behaviour associated with typical fluidized bed systems
  3. Develop generic models, investigate new diagnostic methods and analysis techniques to enable more reliable design and operation of industrial-scale fluidized bed systems

Course Outcomes

The student at the end of the course will have / able to
A clear understanding of fluidization phenomena, operational regimes, classification of particles and its Industrial applications
Knowledge in design various types of gas distributors for fluidized beds and determine effectiveness of gas mixing at the bottom region
Analyze Gross behavior of fluidized beds with respect to the gas velocity /gas-liquid velocities
Estimate pressure drop, minimum fluidization velocity, minimum bubbling velocity, bubble size, voidage, TDH, phase holdups, minimum and maximum semi-fluidization velocities, etc.
Describe different models and calculation of the exchange coefficients, heat and mass transfer rates
Design of various types of fluidized bed systems

Essential Reading

  1. D. Kunii and O. Levenspiel, Fluidization Engineering, Butterworth-Heinemann , 2nd edition, 1991, Indian reprint 2012
  2. C. K. Gupta, D. Sathiyamoorthy, Fluid Bed Technology in Materials Processing, CRC Press , 1st edition, 1998.

Supplementary Reading

  1. J.F. Davidson and D. Harrison, Fludization, Academic Press , 1971
  2. L. S. Fan, Gas-liquid-solid Fludization Engineering, Butterworth-Heinemann , 1989

Journal and Conferences

  1. J. S. N. Murthy and G. K. Roy, "Semifluidization: a Review", Indian Chemical Engineer, Vol. XXIX No. 2 . Pages 9-22