Ignition accelerators

Ignition accelerator Ignitioncup Ignitionpoint Ignition resistance... 

Commercial amyl nitrate has been used as an ignition accelerator for compression-ignition engine fuels (Ref 3). It also was investigated as a possible monofuel in rocket or ATO engines but found to be unsuitable. Amyl nitrate is capable of decompn on a Ni catalyst but the reaction is barely self-sustaining and. large quantities of soot are deposited which quickly choke the pipes of motors(Ref 4). 

Antiknock agents Ignition accelerators 1586b Affecting Combustion—Chamber Surfaces ... 

The mechanism of ignition acceleration by small additions of additives has.been explained on the basis of chain reaction theory 21). It has been suggested 56) that vapor-phase additions are more effective than liquid-phase additions because of the initiation of preflame reactions during the compression stroke. 

Bogen, J. S., Wilson, G. C., Ignition Accelerators for Compression-Ignition Engine... 

Use Polymerization catalyst for resins, including olefins, styrene, styrenated alkyds, and silicones ignition accelerator for diesel fuel organic synthesis intermediate. 

Bogan and Wilson, Ignition Accelerators for Compression-ignition Engine Fuels, Pei. Refiner, July, 1944. 

Consequendy, convective heat transfer determines the intensity of warming up and ignition. In addition, convective heat transfer also plays an important part in the overall dame-to-surface transmission. The reaction of gases is greatiy accelerated by contact with hot surfaces and, whereas the reaction away from the walls may proceed slowly, reaction at the surface proceeds much more rapidly. 

Niobium pentoxide also is reduced to metal commercially by the aluminothermic process. The finely ground powder is mixed with atomized aluminum and an accelerator compound which gives extra heat during reaction, then is ignited. The reaction is completed quickly and, after cooling, the slag is broken loose to free the metal derby which is purified by electron-beam melting. 

The startup speed and temperature acceleration curves as shown in Figure 19-2 are one such safety measure. If the temperature or speed are not reached in a certain time span from ignition, the turbine will be shutdown. In the early days when these acceleration and temperature curves were not used, the fuel, which was not ignited, was carried from the combustor and then deposited at the first or second turbine nozzle, where the fuel combusted which resulted in the burnout of the turbine nozzles. After an aborted start the turbine must be fully purged of any fuel before the next start is attempted. To achieve the purge of any fuel residual from the turbine, there must be about seven times the turbine volume of air that must be exhausted before combustion is once again attempted. 

Styrene 32 (Vinyl benzene) C6H5CH CH2 490 1.1-6.1 0.9 3.6 145 Colourless/oily yellow liquid Penetrating odour Polymerizes slowly in air or light, accelerated by heat or catalysts Ignition/explosion possible Usually inhibited Store <21 °C... 

Fire Hazards - Flash Point (deg. F) 113 OC Flammable Limits in Air (%) Not pertinent Fire Extinguishing Agents Water, dry chemical, carbon dioxide Fire Extinguishing Agents Not To Be Used Not pertinent Special Hazards of Combustion Products Not pertinent Behavior in Fire May explode. Bums with accelerating intensity Ignition Temperature (deg. F) Explodes Electrical Hazard Data... 

Pipeline deflagrations and detonations can be initiated by varions ignition sonrces. The flame proceeds from a slow flame throngh a faster accelerating tnrbnlent flame to a point where a shock wave forms and a detonation transition occnrs, resnlting in an overdriven detonation (see Fignre 4-3). A stable (steady state) detonation follows after the peak overdriven detonation pressnre snbsides. 

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