Page 125 - Applied Process Design For Chemical And Petrochemical Plants Volume II

114 Applied Process Design for Chemical and Petrochemical Plants

Figure 849. Effecfive absorption and stripping factors used in absorption, stripping and fractionation as functions of effective factors. Used
by permission, Edmister, W. C., petroleum Engr. Sept. (1 947) to Jan. (1 948).

which can be written as fsj = the fraction ofV, + li that is absorbed by the
liquid phase
I fai = the fraction of V, + 1 that is absorbed by the
VI’ 1- (8- 217) liquid
n = absorber theoretical trays, also = N
where vli = molar gas flow rate of component “in leaving m = stripper theoretical trays, also .I M
plate 1 in absorber
l0i = molar flow of component “i” in entering liquid
to absorber A material balance on the key component fixes VI, 1,
v, + li = molar gas flow rate of component “i” in enter- and V, + 1 for the key. 4 is estimated after AT and AB are
ing gas to absorber calculated using approximate conditions at the top and
bottom, with a multiple of the minimum solvent rate,