Reid vapor pressure gasoline

As the gasoline Reid vapor pressure (RVP) is reduced, the operation ol the debutanizer becomes more critical. The allowable vapor pressure in gasoline makes it difficult to prevent heavy ends in the alkylation feed. This can limit the production of gasoline without sacrificing alkylation. This limitation is often from insufficient overhead cooling and reboiling ... 

Reid vapor pressure, bar Vapor pressure crude oil, bar Vapor pressure gasoline, bar R crude oil R stabilized gasoline... 

Debutanized gasoline cuts from Arabian Light crude. Reid Vapor Pressure as a function of yield, weight %. Aromatics content as a function of yield, volume %. 

Fuel vapor pressure, or Reid vapor pressure (RVP) is predominantiy influenced by the amount of C-4 in the fuel. California, other of the United States, and the EPA have or are restricting fuel RVP for both seasonal and areas (latitude). These restrictions greatiy reduce all gasoline evaporative losses. 

Reid Vapor Pressure (RVP) is gasoline vapor pressure at I00°F. 

A tank containing 1500 m3 of naphtha is to be blended with two other hydrocarbon streams to meet the specifications for gasoline. The final product must have a minimum research octane number (RON) of 95, a maximum Reid Vapor Pressure (RVP) of 0.6 bar, a maximum benzene content of 2% vol and maximum total aromatics of 25% vol. The properties and costs of the three streams are given in the Table 3.5. 

Seasonal production—the cost of not being able to produce when demand for the product is very high, such as low Reid Vapor Pressure (RVP) gasoline in Northern states during the summer months. 

Reid vapor pressure is measured at 100°F (37.8°C) and is used to help ensure that gasoline will vaporize adequately and ignite within the combustion chamber of an engine. Vapor pressure is provided by volatile gasoline components such as dissolved butane gas and the presence of pentanes, hexanes, heptanes, and benzene. 

The Reid vapor pressure of gasoline increases moderately when ethanol is blended into fuel as an oxygenate. At a 10% ethanol blend volume, the vapor pressure of gasoline can increase by 0.5 to 1.0 psi. 

Volatility Factor A rating of gasoline quality under environmental and operating conditions. It is a function of the Reid vapor pressure, the percent distilled at 158°F (70°C), and the percent distilled at 212°F (100°C). It can be used to help predict the vapor locking tendency of gasoline. 

An additional problem with alcohol-gasoline blends is the increase in vapor pressure of gasoline in the mixture (e.g., see National Research Council, 1991 Calvert et al., 1993 and Timpe and Wu, 1995). This can contribute to much higher Reid vapor pressures, increasing the relative importance of evaporative emissions. 

Figure 5 illustrates graphically the relationship between 10-pound Reid vapor pressure gasoline yield and leaded research octane number (CFRR + 3 ml. of tetraethyllead per gallon) for this series of experiments. At 500 pounds per square inch a yield of 83 volume % of 100 leaded research octane was obtained, while at 250 pounds per square inch this yield was increased to 88 volume % of 100 leaded research octane gasoline. 

A yield advantage on the order of 2 volume % is again shown for the fluid catalyst process. The yields of 10-pound Reid vapor pressure gasoline when blending with extra-... 

Reid vapor pressure. 6 C -f gasoline. e Hydrogenated dimer. 

Vapor Pressure—Equilibrium pressure exerted by vapors over a liquid at a given temperature [2.1, 2.3]. The Reid vapor pressure (RVP) is typically used to describe the vapor pressure of petroleum fuels without oxygenates at 100°F (ASTM Test Method D 323, Test Method for Vapor Pressure of Petroleum Products) [2.5]. The term true vapor pressure is often used to distinguish between vapor pressure and Reid vapor pressure. The Reid vapor pressure test involves saturating the fuel with water before testing and cannot be used for gasoline-alcohol blends or neat alcohol fuels a new procedure has been developed which does not use water and is called Dry Vapor Pressure Equivalent, or DVPE (see ASTM D 4814-95c under Additional Information section). 

Several patents discuss the use of Raman spectroscopy to determine the properties of finished products.93 94 For reformulated gasoline, some of these properties include sulfur, olefin, benzene, volatile organic carbon (VOC), nitrogen oxides (NOx), aromatic contents, total air pollutants (TAPs), Reid Vapor Pressure (RVP), distillation properties, motor and research octane numbers, and drivability. For the octane numbers, the accuracy of the Raman method was limited by errors in the reference method. 

Reid vapor pressure a measure of the volatility of liquid fuels, especially gasoline. 

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