Technical paper
How to Estimate Reid Vapor Pressure (RVP) of Blends
New restrictions on vaporization loss os petroleum products give added emphasis to the measurement of vapor pressure for petroleum fractions and their blends. The common method for measuring vapor pressure is the Reid vapor pressure (Rvp) test. Now an algorithm is available to calculate Rvp without performing the actual test. The algorithm, based on air-and-water free model, uses the Gas Processors Association Soave-Redlich-Kwong equation of state and assumes liquid and gas volumes are additive. Since the calculations are iterative, they are incorporated into a general purpose process simulator to compare predicted values with experimental data. Good agreement is found between predicted and experimental values. Furthermore, the algorithm is fast and can be used to predict Rvp of any hydrocarbon mixture of known composition.
New restrictions on vaporization loss os petroleum products give added emphasis to the measurement of vapor pressure for petroleum fractions and their blends. The common method for measuring vapor pressure is the Reid vapor pressure (Rvp) test. Now an algorithm is available to calculate Rvp without performing the actual test. The algorithm, based on air-and-water free model, uses the Gas Processors Association Soave-Redlich-Kwong equation of state and assumes liquid and gas volumes are additive. Since the calculations are iterative, they are incorporated into a general purpose process simulator to compare predicted values with experimental data. Good agreement is found between predicted and experimental values. Furthermore, the algorithm is fast and can be used to predict Rvp of any hydrocarbon mixture of known composition.