![]() ![]() The expense of fabrication and erection of this equipment certainly warrants recognition of the quality and the methods as well as extra checking time prior to initiating fabrication. Similarly for Dew Point Calculation, n yi i 1 K i 1. K xi 1 i i 1 Or Ki can be directly obtained from DePriester Chart for ith component At a given temperature and pressure. ![]() Interpolation between charts of convergence pressure can be calculated, depending on how close the operating pres- sure is to the convergence pressure. n n K i K r ir y i K r ir xi y i 1 i K r ir xi i 1. The DePriester charts 80 check this quite well (see Figures 8-4A and B, and Figure 8-3D). The use of computers provides capability to examine a useful array of variables that is invaluable in selecting optimum or at least preferred modes or conditions of operation. For n-pentane at convergence pressure of 3,000 psia (nearest chart) the K-value reads 0.19. The more straightforward, uncomplicated systems are being predicted with excellent accuracy. Present design techniques using computer programs allow excellent prediction of performance for complicated multicomponent systems such as azeotropic or high hydrogen hydrocarbon as well as extremely high purity of one or more product streams. ![]() This chapter discusses the performance of distillation process. Although the art and science of distillation has been practiced for many years, studies continue to determine the best design procedures for multicomponent, azeotropic, batch, multidraw, multifeed, and other types. Efficient and economical performance of distillation equipment is vital to many processes. ![]()
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