Height of overall transfer unit

Height of Overall Transfer Unit. Transfer unit heights are found as follows ... [Pg.101]

Hoi. = height of overall transfer unit in terms of liquid film, ft... [Pg.369]

Lr height of overall transfer unit based on Krci concentration in raffinate phase... [Pg.739]

Figure 22.12 presents different factors which determine the column performance as a function of the superficial gas velocity for F = 1. The height of overall transfer unit can be expressed as ... [Pg.590]

Hq and aie called the overall gas-phase height of a transfer unit and the number of overall gas-phase transfer units, respectively. In the case of a straight equiUbrium line, is often neady concentration-independent as explained earher. In such cases, use of equation 47 is especially convenient... [Pg.26]

The heights of a transfer unit ia each phase thus contribute to the overall heights of a transfer unit. Data on values of HTU for various types of countercurrent equipment have been reviewed (1,10). In normal operating practice, the extraction factor is chosen to be not greatiy different from unity, within the range of 0.5—2. [Pg.68]

These models provide values of the height of a transfer unit for the Hquid-phase and the vapor-phase Hy. These values are combined to form the heieht of an overall transfer unit, H ... [Pg.173]

The contribution to the height of a transfer unit overall based on the raffinate-phase compositions is the sum of the contribution from the resistance to mass transfer in the raffinate phase plus the contribution from the resistance to mass transfer in the extract phase divided bythe extraction factor [Eq. (15-31)]. [Pg.1464]

HTU = Height of a transfer unit, ft Kga = Overall gas mass-transfer coefficient, lb moles/(hr) (fF) (atm)... [Pg.96]

The relationship between the overall height of a transfer unit and the individual film transfer units H, and HG, which are based on the concentration driving force across the liquid and gas films, is given by ... [Pg.596]

The height and number of overall transfer units are defined as H0g and Nog by ... [Pg.167]

Benzene is to be absorbed from coal gas by means of a wash-oil. The inlet gas contains 3 per cent by volume of benzene, and the exit gas should not contain more than 0.02 per cent benzene by volume. The suggested oil circulation rate is 480 kg oil/100 m3 of inlet gas measured at 273 K and 101.3 kN/m2. The wash oil enters the tower solute-free. If the overall height of a transfer unit based on the gas phase is 1.4 m, determine the minimum height of the tower which is required to carry out the absorption. The equilibrium data are ... [Pg.175]

Determine the overall transfer coefficient and the height of the transfer unit. [Pg.188]

Outside vapor deposition (OVD), in fiber optic fabrication, 11 140, 141 Outsourcing, of maintenance, 15 478 Ovalbumin, properties of standard, 3 836t Overaged precipitation, 13 502 Overall gas-phase height of a transfer unit (Hog), packed column absorbers, 1 52... [Pg.659]

The Noq in Eq. (16e) is termed the overall number of transfer units. It is dimensionless and is the ratio of the change of bulk-phase concentration to the average concentration driving force. It is essentially a measure of the ease of separation. The H0G in Eq. (16d) is termed the overall height of a transfer unit. It has the dimension of length and defines the vertical height of contactor required to provide a change of concentration equivalent to one transfer unit. [Pg.13]

The overall gas-side transfer units are calculated by assuming that all of the resistance to mass transfer is in the gas phase. The effect of liquid-phase resistance is taken into account by adjusting the height of the transfer unit from Hg to Hog. The equations are... [Pg.423]

OG overall gas-phase height of a transfer unit, see equation 48 m... [Pg.44]

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