CopyCopied, TVMXDCGIABBOFY-UHFFFAOYSA-N If stored in a vapor tight container the vapor pressure can be maintained for long periods of time. This makes cold weather fuel more susceptible to vapor pressure loss and octane decreases. Organic Compound; Gasoline Additive/Component; Food Toxin; Metabolite; Industrial/Workplace Toxin; Natural Compound, DANGER: FLAMMABLE, causes CNS injury, lung & eye irritation, P210-P261-P301+P310-P303+P361+P353-P405-P501a, Eye: Irrigate immediately Skin: Soap wash promptly Breathing: Respiratory support Swallow: Medical attention immediately, inhalation, ingestion, skin and/or eye contact, Irritation eyes, nose; drowsiness; dermatitis; chemical pneumonitis (aspiration liquid); in animals: narcosis, Eyes, skin, respiratory system, central nervous system, Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet (flammable) Change: No recommendation, NIOSH REL : TWA 75 ppm (350 mg/m 3 ) C 385 ppm (1800 mg/m 3 ) [15-minute] OSHA PEL ? Cold weather fuel has higher concentrations of butane. It is a colourless liquid. Zachary Santner 93 octane fuels are more refined and contain more stable hydrocarbons. Please note this additive is degraded by sunlight and can lose all octane boosting properties within minutes of exposure (L.Ter Haar). It is also used as a solvent and in organic synthesis. n-Octane (C 8 H 18) is a colorless liquid that is insoluble in water.It is obtained by fractional distillation of petroleum. AKI is the average of Research octane number (RON) and Motor octane number (MON)(Totten). Octane has many structural isomers that differ by the amount and location of branching in the carbon chain. The components used in Sunoco race fuels are very stable and can retain octane in excess of 2 years when properly stored. This is determined by how much pressure builds up inside a sealed fuel container when the fuel is heated to 100°F. Even in proper storage 87 octane gas can start to degrade in 3 months, 93 octane fuel should last closer to 9 months before degradation is noticeable. 87 octane fuels tend to be less refined and contain more unstable hydrocarbons. Engines must use the proper octane fuel to avoid knock and provide reliable operation. Octane ratings are important because different engines expose fuel to different amounts of pressure and heat. Sunoco 260 GT Plus is our only race fuel that contains MMT. The additive is stable in gasoline as long as no UV light hits the fuel. Special thanks goes to Minnesota State University Mankato, Automotive Engineering Technology students for suggesting the topic of this article. It’s no surprise because selecting octane of gasoline is the only choice the consumer has, except what station to buy it from. Over time as vapor pressure decreases the fuel can become stale. The alkene is classified as a higher olefin and alpha-olefin, meaning that the double bond is located at the alpha (primary) position, endowing this compound with higher reactivity and thus useful chemical properties. Technical Specialist Acta, 41(7), 1958, 1915-1932. https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:17590, ACD/Labs Percepta Platform - PhysChem Module, US Environmental Protection Agency’s EPISuite, Compounds with the same molecular formula, Search Google for structures with same skeleton, 257-259 F / 760 mmHg (125-126.1111 °C / 760 mmHg), 258 F / 760 mmHg (125.5556 °C / 760 mmHg), Soluble in ether, Slightly soluble in alcohol. Octane stability is greatly affected by the storage conditions. s; CAS no: 111659; Data type: Normal alkane RI value specified by scale definition; Authors: von Kovats, E., 206. Proper storage can preserve octane for years but improper storage can reduce octane and degrade fuel within weeks. ... predict which has a higher boiling point—hexane or octane. Essentially, these numbers provide a scale to measure how much heat and pressure can be put on the fuel before it spontaneously combusts. As the months pass during storage these unstable components react to form gums, varnishes and lower octane hydrocarbons. The higher boiling point means vapor pressure decreases won’t be as common until the fuel is exposed to temperatures above 80°F. If the fuel tank is vented to atmosphere the butane can start to evaporate out unless the daily temperatures are below freezing. Chim. Octane is flammable and moderately toxic. As a result the octane can decrease within months for 87 octane fuels, especially when stored under less than ideal conditions. A straight chain alkane composed of 8 carbon atoms. NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data) Totten, George E., Steven R. Westbrook, and Rajesh J. Shah. The butane vapor pressure issue is addressed with the use of chemical components that boil around 80°F. http://www.sunocoracefuels.com/tech-article/race-fuel-storage. That is why we provide proper storage information on our website. Pump fuels with high (12 pounds/square inch, psi) vapor pressures are used in cold weather to prevent engine starting issues due to low temperatures. Degraded MMT will settle to the bottom of the container as a rust colored material that can clog fuel lines and filters. Print. Colorless liquid with a gasoline-like odor. In this article we will focus on octane stability of 87 and 93 octane pump fuels versus racing fuels and what you can do to prevent octane loss in your fuel. We have test results confirming octane stability in our unleaded, leaded, ethanol-free and ethanol fuels. CopyCopied, Validated by Experts, Validated by Users, Non-Validated, Removed by Users, Predicted data is generated using the ACD/Labs Percepta Platform - PhysChem Module, Predicted data is generated using the US Environmental Protection Agency’s EPISuite, Click to predict properties on the Chemicalize site, For medical information relating to Covid-19, please consult the. Keep in mind that 93 octane fuels are still susceptible to octane loss and vapor pressure decreases due to butane evaporation.
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