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octane value

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  • Octane rating — or octane number is a standard measure of the anti knock properties (i.e. the performance) of a motor or aviation fuel. The higher the octane number, the more compression the fuel can withstand before detonating. In broad terms, fuels with a… …   Wikipedia

  • octane number — 1. A measure of petrol s resistance to pre ignition or pinking , which is the sound made by an engine when pre ignition occurs, particularly at low revs and high load. Two measures are used, for low speed and high speed pre ignition. ULSP in the… …   Petroleum refining glossary

  • Smith–Minkowski–Siegel mass formula — In mathematics, the Smith–Minkowski–Siegel mass formula (or Minkowski–Siegel mass formula) is a formula for the sum of the weights of the lattices (quadratic forms) in a genus, weighted by the reciprocals of the orders of their automorphism… …   Wikipedia

  • Green Methanol Synthesis — or Green Methanol is entirely developed from renewable sources of energy. Methanol made from this process would predominately synthesize from the following reaction: :CO2 + 3 H2 → CH3OH + H2OHow this differs from traditional methanol synthesis… …   Wikipedia

  • alkylation — 1. A process for manufacturing high octane blending components used in unleaded petrol or gasoline (RON 95,97,98). 2. A refinery process for chemically combining isoparaffin with olefin hydrocarbons. The product, alkylate, has high octane value… …   Petroleum refining glossary

  • Bristol Taurus — The Taurus was a 14 cylinder two row radial aircraft engine, produced by the Bristol Engine Company starting in 1936. The Taurus was developed by adding cylinders to the existing Aquila design, creating a design that produced just over 1,000… …   Wikipedia

  • Alkylation —   A refining process for chemically combining isobutane with olefin hydrocarbons (e.g., propylene, butylene) through the control of temperature and pressure in the presence of anacid catalyst, usually sulfuric acid or hydrofluoric acid. The… …   Energy terms

  • Mothball — Mothballs Mothballs are small balls of chemical pesticide and deodorant used when storing clothing and other articles susceptible to damage from mold or moth larvae (especially clothes moths like Tineola bisselliella). Their use when clothing is… …   Wikipedia

  • Engine efficiency — of thermal engines is the relationship between the total energy contained in the fuel, and the amount of energy used to perform useful work. There are two classifications of thermal engines (1) Internal combustion (gasoline, diesel and gas… …   Wikipedia

  • rating — i. An authorization entered on a license and forming a part, thereof, stating special conditions, privileges, and limitations pertaining to the license. ii. An endorsement to the pilot’s license that defines additional qualifications, privileges …   Aviation dictionary

  • Ethyl Tertiary Butyl Ether — (ETBE)   A chemical compound produced in a reaction between ethanol and isobutylene (a petroleum derived by product of the refining process). ETBE has characteristics superior to other ethers: low volatility, low water solubility, high octane… …   Energy terms

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