Volatility gasoline

Among several other gasoline volatility criteria, we will cite the V/L ratio and the relations existing between the various ways of expressing the vapor pressure. 

At 77°F gasoline has a vapor pressure of 4.6 psia. Why can gasoline be stored in vented storage vessels without the presence of flammable vapors above the liquid in the vessel Comment on the EPA s effort to reduce gasoline volatility in order to reduce fugitive emissions. What will happen as the volatility is reduced ... 

Volatility is important to consider when discussing the combustibility of gasoline and the burning quality of kerosene. Gasoline volatility is crucial to the combustion process. In order to initiate and ensure smooth combustion of gasoline, volatile compounds such as low-molecular-weight branched paraffins and aromatics must... 

Automotive gasoline Volatility class A Volatility class B Volatility class C Volatility class D Volatility class E D 439... 

With respect to ETBE, ethanol has, however, some disadvantages such as volatility and water solubility. Its RVP is more four times that of ETBE and it adversely affects the gasoline volatility in fact, ethanol addition causes a significant reduction in temperature for the front end evaporation and, as a consequence, the light cheap gasoline components, such as butanes and pentanes, have to be removed to meet the volatility specification limit. 

After World War I there was a substantial effort on the part of the automobile manufacturers, the petroleum refining industry, and, to some extent, the chemical companies to investigate the properties of fuels such as chemical composition of gasolines, volatility, knocking tendency, storage problems, etc. The effort in the U.S.A. was especially notable. The phenomenon of knocking and its limitations on engine output and performance (compression ratio) and the relationship of chemical structures of fuels and... 

Gasoline volatility is usually expressed in terms of Reid Vapor Pressure (RVP), which is the fuel s vapor pressure at 37.7 (100 F). Smylie et al., (1991) presented very interesting data... 

Liquefied petroleum gas (LPG) Commercial propane Commercial butane Aviation gasoline (Avgas) Automotive gasoline Volatility class A Volatility class B Volatility class C Volatility class D Volatility class E Aviation turbine fuel Jet A or A-1 JetB... 

Traditionally, a major demand for natural gas liquids, mainly butanes and pentanes, has been in the manufacture of motor gasolines. However, the recent phaseout of leaded gasoline and the current, ongoing reduction in motor gasoline volatility have drastically reduced demand for pentane and butanes as gasoline blending stocks. On the other hand, these same measures, enacted to reduce air pollutants from the automobile, have resulted in an increased demand for these products as prime... 

The products could be classified as a function of various criteria physical properties (in particular, volatility), the way they are created (primary distillation or conversion). Nevertheless, the classification most relevant to this discussion is linked to the end product use LPG, premium gasoline, kerosene and diesel oil, medium and heavy fuels, specialty products like solvents, lubricants, and asphalts. Indeed, the product specifications are generally related to the end use. Traditionally, they have to do with specific properties octane number for premium gasoline, cetane number for diesel oil as well as overall physical properties such as density, distillation curves and viscosity. 

Thermal Cracking. In addition to the gases obtained by distillation of cmde petroleum, further highly volatile products result from the subsequent processing of naphtha and middle distillate to produce gasoline, as well as from hydrodesulfurization processes involving treatment of naphthas, distillates, and residual fuels (5,61), and from the coking or similar thermal treatment of vacuum gas oils and residual fuel oils (5). 

The market value of natural gas Hquids is highly volatile and historically has been weakly related to the world price of cmde oil. During the 1980s, the market value of natural gas Hquids ranged from approximately 60% of the price of cmde to 73% (12). In this 10-year interval, several fluctuations occurred in the natural gas Hquid market. Because of the variabiHty of the natural gas Hquid market, the NGL recovery plants need to have flexibiHty. Natural gas Hquid products compete in the following markets ethane propane a Hquefted petroleum gas (LPG) a C-3/C-4 mix and / -butane all compete as petrochemical feedstocks. Propane and LPG are also used as industrial and domestic fuels, whereas 2-butane and natural gasoline, consisting of C-5 and heavier hydrocarbons, are used as refinery feedstocks. 

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