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Mass transfer of volatile organics in a packed column

Thesis/Dissertation ·
OSTI ID:5431523
Interphase mass transfer kinetics of several organic compounds in the air-water system were investigated in a countercurrent flow packed column. Oxygen and water mass transfer was studied simultaneously, to provide in-system reference substance data for single-phase limited compounds. Flooding studies were conducted to determine allowable air and water loadings at the desired air:water ratios. Column flooding points were accurately predicted using existing pressure drop correlations. The importance of operating a stripping column well below the loading range was underscored by the finding that the loading region covers a very narrow range of gas rates. Operating pressure drops were from 30 to 50% of predicted values, indicating that predicted column operating expenses may be overestimated using existing pressure drop estimation methods. New equilibrium data and enthalpies of desorption from water in the temperature range of 5 to 20/sup 0/C is reported for cis-1,2-dichloroethene, bromodichloromethane, chlorodibromomethane, bromoform, toluene, chlorobenzene, ethylbenzene, p-xylene, o-xylene, m-dichlorobenzene, p-dichlorobenzene, nitrobenzene and naphthalene. Mass transfer coefficients were estimated using both the Onda correlation and in-system reference substance data. Measured oxygen and water mass transfer coefficients were approximately 50 and 25%, respectively, of values estimated using the Onda correlations. Good agreement was obtained between measured and predicted (using Onda correlations) organic solute mass transfer coefficients under conditions where absorption factors were less than 1.0.
Research Organization:
Iowa Univ., Iowa City (USA)
OSTI ID:
5431523
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
AIR
ALKYLATED AROMATICS
AROMATICS
BROMINATED ALIPHATIC HYDROCARBONS
BROMOFORM
CONDENSED AROMATICS
DESORPTION
ENTHALPY
FLUIDS
GASES
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROCARBONS
HYDROGEN COMPOUNDS
LOADING RATE
MASS TRANSFER
NAPHTHALENE
NITRO COMPOUNDS
NITROBENZENE
ORGANIC BROMINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SOLVENTS
OXYGEN COMPOUNDS
PACKED BED
PHYSICAL PROPERTIES
PRESSURE DROP
SOLVENTS
THERMODYNAMIC PROPERTIES
TOLUENE
WATER
XYLENE-PARA
XYLENES