Question

Problem Set I It is desired to mix three hydrocarbon streams denoted by A, B, and C in certain proportions so that the final mixture will meet certain vapor-pressure specifications. These specifications will be met by a stream of composition D as indicated in the following table. The values are vapor volume percent. a) Sketch the process diagram. b) Preform the degree of freedom analysis. c) Make necessary assumptions and calculate the proportions in which streams A, B, 1- and C must be mixed to give a product with a composition of D The subscripts on the Cs represent the number of carbons, and the +sign on Cs' indicates all compounds of higher molecular weight as well as iso-Cs. Does this problem have a unique solution? Component Stream A Stream B Stream C Stream D C2 C3 iso-Ca n-Ca iso-Cs 5.0 90.0 5.0 10.0 85.0 5.0 8.0 80.0 12.0 1.4 31.2 53.4 12.6 1.4

Answer 1