Chemical Engineering :: Mass Transfer
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The overall mass transfer co-efficient for the absorption of SO2 in air with dilute NaOH solution can be increased substantially by
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Flooding results in
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For the air water system under ambient conditions, the adiabatic saturation temperature and the wet bulb temperature are nearly equal, because
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In an operating distillation column, the
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In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the
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The diffusivity (D) in a binary gas mixture is related to the temperature (T) as
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For which of the following unit operations, Lewis number is of significance ?
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Tray spacing in a distillation column of dia 10-12 ft. used in petroleum refinery may be around __________ inches.
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If a1 and a2 are the relative volatilities when the pressure in the distillation column is 1 and 2 atm respectively. Pick out the correct statement.
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The dimension of diffusivity is same as that of the
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A.
vapors and liquids are at their dew point and bubble point respectively
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B.
driving force for the liquid flow is its specific weight.
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C.
driving force for the vapor flow is the pressure drop, as the pressure decreases gradually from the bottom to the top of the column.
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D.
highest temperature is encountered at the top of the column.
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