Stripping factors

In these equations S denotes the stripping factor, Equation 77 is only vaUd for a sufftciendy high number of transfer units so that the correction... [Pg.36]

A general, approximate, short-cut design procedure for adiabatic bubble tray absorbers has not been developed, although work has been done in the field of nonisothermal and multicomponent hydrocarbon absorbers. An analytical expression which will predict the recovery of each component provided the stripping factor, ie, the group is known for each component on each tray of the column has been developed (102). This requires knowledge... [Pg.42]

Example 2 Calculation of Kremser Method For the simple absorber specified in Fig. 13-44, a rigorous calculation procedure as described below gives results in Table 13-9. Values of were computed from component-product flow rates, and corresponding effective absorption and stripping factors were obtained by iterative calculations in using Eqs. (13-40) and (13-41) with N = 6. Use the Kremser method to estimate component-product rates if N is doubled to a value of 12. [Pg.1277]

In the inner-loop calculation sequence, component flow rates are computed from the MESH equations by the tridiagonal matrix method. The resulting bottoms-product flow rate deviates somewhat from the specified value of 50 lb mol/h. However, by modifying the component stripping factors with a base stripping factor, S, in (13-109) of 1,1863, the error in the bottoms flow rate is reduced to 0,73 percent. [Pg.1289]

For systems in which the concentrations are large and the stripping factor S may vary along the tower, the following Edmister eqnadons... [Pg.1358]

Ne = Bquid-pbase transfer units X = mG,n/L,n (stripping factor) m = slope of equibbrium curve G, = gas rate, moFs L,n = bquid rate, moFs... [Pg.1381]

On an XY diagram for case C the operating line will go through points Xr, Ys and Xf, with a slope of R /S similar to Fig. 15-13. When using the Kremser equation for case C, one uses the pseudo feed concentration X from Eq. (15-21) and the stripping factor from Eq. (15-22). One uses the raffinate concentration X and inlet solvent concentration Y, without modification. [Pg.1463]

S, = Stripping factor for component i in bottom section S = Stripping factor for component i in top section... [Pg.71]

Figure 1. This graph shows the abosrption and stripping factors, Eg and E, versus effective values, Ae and Se (efficiency functions). (By permission, W. C. Edmister, Petroleum Engineer, September, 1947 Series to January, 1948.)...

Edmister, W. C., Absorption and Stripping-factor Functions for Distillation Calculation by Manual- and Digital-computer Methods, A.I.Ch.E. Journal, June 1957. [Pg.100]

S = Smith-Brinkley overall stripping factor for component i... [Pg.222]

Smin = minimum stripping factor at minimum flow rate for air... [Pg.100]

Sopt = optimum stripping factor, where treatment costs are a minimum, referenced to costs of utilities, maintenance, depreciation, labor. As economic conditions change one may need to adjust Sopj, see Reference 143. [Pg.100]

Minimum stripping factor at corresponding minimum air flotvrate ... [Pg.100]

It can be important to examine the problem and evaluate the optimum stripping factor based on related costs, thus ... [Pg.100]

Constants a and b were determined from a linear regression for x /Xq = 4.75% and x>j and Xq = 0.05% for the packed and tray towers. The optimum stripping factor decreases as the Henry s Law constant decreases. Due to the complex relationship between cost and performance, the authors [143] recommend caution in attempting to extrapolate from the water flotvrate ranges shown. [Pg.100]

Henry s Law Constants and Optimum Stripping Factors for Selected Organic Compounds for Use th Tray Towers... [Pg.101]

St = Theoretical trays/stages at actual reflux, L/D, including reboiler and total condenser Sopt = Optimum stripping factor (SR)i = Separation factor... [Pg.105]

Figure 8-58. Absorption and stripping factors, Ea or Eg vs. effective values Ag or Se (efficiency functions). Used by permission, Edmister, W. C., Petroleum Engr., Sept. (194 to Jan. (1948).

This method [18] is well suited to handling the details of a complicated problem, yet utilizing the concept of average absorption and stripping factors. It also allows for the presence of solute components in the solvent and the loss of lean oil into the off gas. Reference 18 presents more details than are included here. Reference 18 is Edmister s original publication of the basic method for absorbers and strippers. Reference 18 also generates the... [Pg.112]

The stripping factor, Sg, is taken as 1/Ag = 0.6010 4. Calculation of required number of theoretical stages. Using Equation 8-216 for n-butane,... [Pg.116]

Edmister, W. C., Hydrocarbon Absorption and Fractionar tion Process Design Methods, Pet. Engr. May 1947-March 1949 and, Absorption and Stripping—Factor Functions for Distillation Calculations by Manual and Digital—Computer Methods. A.I.ChJE. foumal, V. 3, No. 2 p. 165 (1957). [Pg.224]

The group VKi/L is called the stripping factor S, and is the reciprocal of the absorption factor. [Pg.500]

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