Chemical Engineering :: Fuels and Combustion
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For every 10% increase in the excess air; the fuel consumption increases by __________ percent.
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Fusion point of coal ash increases with increase in its __________ content.
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Pick out the wrong statement.
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Dry air required to burn 1 kg of carbon completely may be around __________ kg.
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Main component of sewage gas produced during aneorobic decomposition of organic waste (by suitable bacteria) during sewage disposal is
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Softening temperature of coal ash is a measure of the __________ of coal.
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A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be
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Presence of phosphorous in metallurgical coal
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Initial pressure of oxygen introduced into the 'bomb' of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around __________ atm.
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'Fat' coal means a coal having
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A.
Pulverised fuel can be completely burnt with less percentage of excess air compared to lump coal.
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B.
Low grade coal can be used, but generally high volatile matter coals are more suitable for making pulverised fuel.
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C.
Regulation of furnace temperature and atmosphere (oxidising or reducing) is easily possible with pulverised fuel firing.
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D.
none of these.
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