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Combustion is the rapid chemical
combination of oxygen with thecombustible elements of a fuel, resultingin the production of heat.Combustion is accomplished by mixing
fuel and air at elevated temperatures. The air supplies oxygen, which uniteschemically with the carbon, hydrogen, anda few minor elements in the fuel to
produce heat.
CCOMBUSTIONOMBUSTION
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ORSAT ANALYSISORSAT ANALYSIS
The apparatus consistsessentially of a calibrated water-
jacketed gas burette connected
by glass capillary tubing to two orthree absorption pipettescontaining chemical solutionsthat absorb the gasses it is
required to easure. !or safety and portability, theapparatus is usually encased in awooden box.
The absorbents are"
Potassium HydroxidePotassium Hydroxide(Caustic Potash(Caustic PotashA!"a!i#e $yro%a!!o!A!"a!i#e $yro%a!!o!ammo#iaca! Cu$rousammo#iaca! Cu$rous
ch!oridech!oride The base of the as burette is
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%nswer the following
• &hat are the typical gases that are releasedfrom combustion of a solid fuel'
• (roximity analysis'
•
)ltimate analysis'• *rsat analysis'
• &hat is meant by excess air '
• +escribe the proximate and ultimate analysesof coal.
• &hat is absolute pressure, and how is itdetermined'