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TOPIC
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SUB-TOPICS
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Introduction
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Course organization, projects, grading
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CPI Perspective
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Examples of processes that handle and
separate solids. Discussion of typical operations (storage hoppers,
conveying, filters, drying, reactors, etc.) in a broad perspective.
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Particle Size and Shape
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Methods of measuring particle size,
definitions of particle size, mesh size, typical sizes of common materials.
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Size Distributions
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Definitions of averages, frequency and
cumulative distributions (number, area, mass), choice of mean particle
size.
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Drag force on a spherical and
non-spherical particle
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Drag coefficient, terminal velocity,
sphericity, correlations
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Bulk properties of solids
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Angle of repose; porosity; loose, normal, and dense
packing; bulk density, slurry viscosity, coefficient of friction,
axial-to-lateral stress ratio.
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Hindered settling
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Uniform size distribution of particles,
Bimodal size distribution of particles
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Packed Beds
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Ergun’s Equation, Darcy’s Law and
permeability
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Fluidized Beds
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Types of fluidization (smooth, bubbling, slugging),
minimum fluidization velocity, Geldart classification.
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Elutriation
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Freeboard, entrainment rate
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Solid/liquid separations
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Four stages of separation, range of
driving forces for separations.
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Selection of Solid/Liquid separation equipment
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Performance guides and selection charts
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Hopper design
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Flow modes, stress distributions,
segregation phenomena
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Pneumatic Conveying
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Dilute phase, dense phase, plug flow,
pressure drop calculations
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Separation Efficiency (Grade Efficiency)
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Definition, ideal versus real, sharpness
of cut
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Cyclones
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Gas, liquid, collection efficiency and
cut size, pressure drop
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