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An antiknock agent is a gasoline additive used to reduce engine knocking and increase the fuel's octane rating by raising the temperature and pressure at which auto ...
Antiknock agents allow the use of higher compression ratios for greater efficiency [22] and peak power. [23] Adding varying amounts of additives to gasoline allowed easy, inexpensive control of octane ratings. TEL offered the business advantage of being commercially profitable because its use for this purpose could be patented. [16]
By definition, the isomers iso-octane and n-heptane have an octane rating of 100 and 0, respectively. [86] Because of its more volatile nature, n-heptane ignites and knocks readily, which gives it a relatively low octane rating; [87] the isomer iso-octane causes less knocking because it is more branched and combusts more smoothly. In general ...
Antiknock agents. Tetraethyllead (TEL), now banned almost everywhere for causing brain damage. Methylcyclopentadienyl manganese tricarbonyl (MMT) is a neurotoxic substance and is fatal if swallowed/inhaled and causes manganism. [7] Ferrocene; Dimethyl methylphosphonate; Toluene; Isooctane; Triptane; Lead scavengers (for leaded gasoline)
In spark-ignition internal combustion engines, knocking (also knock, detonation, spark knock, pinging or pinking) occurs when combustion of some of the air/fuel mixture in the cylinder does not result from propagation of the flame front ignited by the spark plug, but when one or more pockets of air/fuel mixture explode outside the envelope of the normal combustion front.
Tetramethyllead, also called tetra methyllead and lead tetramethyl, is a chemical compound used as an antiknock additive for gasoline. [1] Its use is being phased out for environmental considerations. [2] The National Institute for Occupational Safety and Health (NIOSH) in the United States has identified tetramethyllead as a potential ...
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Methyl tert-butyl ether (MTBE), also known as tert-butyl methyl ether, is an organic compound with a structural formula (CH 3) 3 COCH 3.MTBE is a volatile, flammable, and colorless liquid that is sparingly soluble in water. [1]