Fuels and Combustion
Which of the following would require least amount of secondary air for combustion
Coke breeze containing 25% ash and 2% volatile matter.
Anthracite containing 10% volatile matter and 8% ash.
Bituminous coal containing 20% ash and 25% volatile matter.
Semi-bituminous coal containing 25% ash and 20% volatile matter.
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Phosphoric acid is produced in wet process from phosphate rock and
The fugacity of liquid water at 298 K is approximately 3171 Pa. Considering the ideal heat of vaporisation as 43723 J/gm mole, its fugacity at 300 K would be
Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium