## PetroFrac - iPhone

PetroFrac calculates properties of refinery petroleum fractions based on the D86 distillation and API gravity. You enter the 10%, 50% and 90% D86 distillation temperatures along with the API gravity.

**Petroleum Fraction Property Calculator**

The program calculates:

SG, Specific gravity, Watson K, MW, molecular weight

Once you enter the flow temperature the program calculates:

- Density at flow temperature, g/cm3
- Viscosity at flow temperature
- Cp, Heat capacity at flow temperature, BTU/(lb Deg F)
- H Liquid, Enthalpy of liquid at flow temperature, BTU/Deg F
- H Vapor, Enthalpy of vapor at flow temperature, BTU/Deg F
- Heat Vap, Heat of vaporization at flow temperature, BTU/Deg F

Any values that are extrapolated beyond the ranges of the correlations are displayed in purple text.

Tapping on the “API” label toggles it to Specific Gravity. You can then enter SG and PetroFrac will calculate the API Gravity.

Petroleum Fraction Property Calculator

PetroFrac calculates properties of refinery petroleum fractions based on the D86 distillation and API gravity. You enter the 10%, 50% and 90% D86 distillation temperatures along with the API gravity.

References:

“New correlation for predicting the viscosity of heavy petroleum fractions”

H. M. Moharam, R. A. Al-Mehaideb and M. A. Fahim

Fuel vol. 74, 1995.

I’ve extended the correlation range using ASTM Designation: D341 – 93 (Reapproved 1998).

“New correlation predicts density of petroleum fractions”

Jose Vicente Gomez, Oil and Gas Journal, July 13, 1992

“Improve Predicted Enthalpy of Fractions”

M. G. Kesler and B. I. Lee

Hydrocarbon Processing 55, No. 3

American Petroleum Institute

Technical Data Book – Petroleum Refining