Simple predictive procedure calculates heptane K-value

This article presents a simple equation that provides good estimates of C(sub)7+ K-values, also known as equilibrium ratios. The equation is based on ethane and n-heptane K- values. It only requires the linear slope from a graph of the log of K-values vs. the square of normal boiling point. The only...

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Bibliographic Details
Published in:The Oil & gas journal 2003-04, Vol.101 (14), p.62-65
Main Authors: MOSHFEGHIAN, Mahmood, JOHANNES, Arland H, MADDOX, Robert N
Format: Magazinearticle
Language:English
Subjects:
Applied sciences
Chemical engineering
Civil engineering
Computer simulation
Crude oil, natural gas and petroleum products
Energy
Equilibrium
Ethane
Exact sciences and technology
Experimental data
Experiments
Fuels
Hydrocarbons
Natural gas
Petroleum
Petroleum products, gas and fuels. Motor fuels, lubricants and asphalts
Processes
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Summary:This article presents a simple equation that provides good estimates of C(sub)7+ K-values, also known as equilibrium ratios. The equation is based on ethane and n-heptane K- values. It only requires the linear slope from a graph of the log of K-values vs. the square of normal boiling point. The only required information is the C(sub)7+ fraction normal boiling point. The choice of ethane and n-heptane is arbitrary; one can use any other pair of components such as methane and n-hexane. The equation's accuracy is tested against experimental data using the Soave-Redlich-Kwong (SRK) equation of state. The overall average experimental data and the SRK was 7.41%.
ISSN:0030-1388
1944-9151