January 2007

Process Technology

Consider continuous thermodynamics approach for modeling

A new simulation method selectively uses key components to optimize various refining units

Datta, K. A., WorleyParsons; Singh, S., Fort Wheeler Eastern Pte. Ltd.

A petroleum mixture exhibits continuous variations of physical and thermodynamic properties due to the numerous hydrocarbons with varying molecular structures present. It is impossible to account for the actual components of various crude oils; thus, modeling practice uses discrete components that are popularly known as pseudo components. A pseudo component can be chosen to have an average true boiling point (TBP) and specific gravity (sg). For example, pseudo component 1 can be chosen to have a TBP range of 27°C to 52°C, pseudo component 2 a TBP range of 52°C to 77°C and so forth. Once the average TBP and sg of pseudo components have been identified, empirical correlatio

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