Page 524 - Air Pollution Control Engineering

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Emerging Pollution Control Technologies 491

V Velocity of particle in scrubber or relative to the target
V Velocity of gas
g
V Initial horizontal velocity
0
V Velocity of particle
p
V Terminal settling velocity
s
V Throat gas velocity
t
W Work
W Net reversible cycle work
net
W Work by a pump
p
X Concentration of solute in liquid
X Stopping distance
s
x Mole fraction in liquid
Y Gas-phase concentration of solute in
1
Y 2 Gas phase concentration of solute out
∆ Change
ε 0 Dielectric constant of a free space
µ micron, 10 m
−6
µ c Gas viscosity divided by Cunningham correction factor
µ g Gas viscosity
η Fractional collection efficiency
η p Efficiency of impactor
η R Net reversible cycle work
η t Turbine stage efficiency
ρ a Apparent density of suspended matter
ρ g Gas density
ρ p Particle density
τ Surface tension
τ a Charged particle self-removal time
τ c Cleaning time
τ R Charged particle lifetime
τ res Residence time
τ sc Scrubbing cleaning time
τ SR Particle scrubbing time
φ Deposition rate
ψ Inertia impaction parameter
ω Angular velocity

REFERENCES
1. H. C. McKee, Chem. Eng. Prog. 97(10), 42–45 (2001).
2. A. Neville, Environ. Protect., 13(10), 16–20 (2002).
3. T. K. Garret, Environ. Sci. Technol. 9(9) (1975).
4. J. E. McEvoy, Catalysis for the Control of Automotive Pollutants. Advances in Chemistry.
Series. No. 143. Chemical Society, Washington, DC, 1975.
5. G. S. Springer, and D. J Patterson, Engine Emissions, Pollutant Formation and Measurement.
Plenum, New York, 1973.