NOx formed via the Zeldovich mechanism. The rate-limiting step in this mechanism is the formation of the O radical. This occurs only at high temperatures (above about 2400o F.). Hence the term thermal NOx, since it is NOX produced in the highest temperature regions of the flame.
Related Terms |
AIR COOLER
A factory-encased assembly of elements whereby the temperature of air passing through the device is reduced.
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CLEAN ROOM
A facility or enclosure in which air content and other conditions (such as temperature, humidity, and pressure) are controlled and maintained at a specific level by special facilities and operating processes and by trained personnel.
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ABSOLUTE ZERO TEMPERATURE
Temperature measured from absolute zero (-459.67°F, or -273.16°C).
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AIR REHEATING
In an air conditioning system, the final step in treatment, in the event the temperature is too low.
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CLOUD POINT
The temperature at which waxy crystals in an oil or fuel form a cloudy appearance.
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ABSOLUTE TEMPERATURE SCALE
A scale of temperature measurement in which zero degrees is absolute zero.
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CARBON RESIDUE
Coked material remaining after an oil has been exposed to high temperatures under controlled conditions.
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REFRIGERATOR
A device to transfer heat from a low temperature to a high temperature medium.
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ANTI-WEAR ADDITIVE
Improves the service life of tribological elements operating in the boundary lubrication regime. Anti-wear compounds (for example, ZDDP and TCP) start decomposing at 90° to 100°C and even at a lower temperature if water (25 to 50 ppm) is present.
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FIRE POINT
The temperature to which a combustible liquid must be heated so that the released vapor will burn continuously when ignited under specified conditions (Clevelend Open Cup).
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