Improvements in the selection of real components forming a substitute mixture for petroleum fractions |
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Authors: | Egon Eckert Tomáš Vaněk |
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Institution: | (1) Department of Chemical Engineering, Institute of Chemical Technology, Technická 5, 166 28 Prague, Czech Republic |
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Abstract: | Complex mixtures, particularly petroleum fractions, usually need to be suitably modeled before providing the simulation and
other types of chemical engineering calculations. The most convenient way is to describe the original mixture by a substitute
mixture. The formerly published approach based on the employment of substitute mixtures of real components can be improved
in order to get a closer match between the behavior of the original and substitute mixtures. In the first phase of the algorithm,
a new concept of a band around the characterization curves brings wider possibilities for the selection of real components
into the substitute mixture. The second phase, which is used to determine the composition of the substitute mixture, can be
also improved by considering the global or bulk properties of the original mixture if available. Typically, some of the properties
e.g. liquid density, molecular mass and PNA (Paraffinic/Naphthenic/Aromatic carbon) analysis can be measured and used to improve
the adjustment of the composition. The improved algorithm is illustrated by an example. |
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Keywords: | characterization procedures TBP curve petroleum fractions substitute mixtures PNA analysis |
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