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Multistage multicomponent separation calculations using thermodynamic properties evaluated by the srk/pr equation of state
Author(s) -
Shah M. K.,
Bishnoi P. R.
Publication year - 1978
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450560408
Subject(s) - equation of state , convergence (economics) , range (aeronautics) , hydrocarbon mixtures , thermodynamics , hydrocarbon , computer science , chemistry , materials science , physics , organic chemistry , economics , composite material , economic growth
A computational procedure using thermodynamic properties evaluated by the Soave‐Redlich‐Kwong' (SRK) equation of state or the Peng‐Robinson (PR) equation of state is developed for multistage multicomponent separation processes. The procedure makes use of the Ishii‐Otto convergence scheme with the proposed modifications for application with the equation of state. A new technique is developed to improve an initial estimation of temperature profile in a column. The computational procedure is tested on CDC CYBER 172 computer for a wide range of problems including lean oil absorbers, reboiled absorbers and fractionators and a debutaniser operating in a natural gas processing plant in Alberta. The computational results are compared with those obtained using the Chao‐Seader model for generating the required thermodynamic properties. It is concluded that the present computational procedure can be used more reliably over a wider range of processing conditions such as those involved in the cryogenic separation of natural gases and in the separation of heavy hydrocarbon mixtures.