Discuss proximate analysis of Coal.
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Proximate analysis tests conducted :
Moisture
Moisture is the water that exists in the coal at the site, time, and under the conditions it is sampled.
Sulfur
It is important to measure the sulfur content in coal samples to evaluate the potential sulfur emissions from coal combustion, or for contract specifications purposes.
Calorific Value
The calorific value of coal or coke is the heat liberated when the solid fuel undergoes complete combustion in oxygen.
Volatile Matter
Volatile matter includes the components of coal, except for water, which are liberated at high temperature in the absence of oxygen. Volatile matter is a key health and safety concern as coals high in volatiles have an increased risk of spontaneous combustion.
Fixed Carbon
The fixed carbon content of coal is determined by subtracting the percentages of moisture, volatile matter and ash from the original mass of the coal sample: the solid combustible residue that remains after a coal has had the volatiles driven off.
ASH
it conducts a variety of fundamental ash analysis tests including ash elemental tests, ash fusion tests and coal ash analysis.
ULTIMATE ANALYSIS TESTS
Ultimate analysis tests produce more comprehensive results than the proximate analyses. it uses the results from ultimate analysis tests to determine the elemental composition of the coal including moisture, ash, carbon, hydrogen, nitrogen, sulfur, and oxygen (by difference). We determine each element through chemical analysis and express it as a percentage of the total mass of the original coal or coke sample.
hope it helps you :)
Moisture
Moisture is the water that exists in the coal at the site, time, and under the conditions it is sampled.
Sulfur
It is important to measure the sulfur content in coal samples to evaluate the potential sulfur emissions from coal combustion, or for contract specifications purposes.
Calorific Value
The calorific value of coal or coke is the heat liberated when the solid fuel undergoes complete combustion in oxygen.
Volatile Matter
Volatile matter includes the components of coal, except for water, which are liberated at high temperature in the absence of oxygen. Volatile matter is a key health and safety concern as coals high in volatiles have an increased risk of spontaneous combustion.
Fixed Carbon
The fixed carbon content of coal is determined by subtracting the percentages of moisture, volatile matter and ash from the original mass of the coal sample: the solid combustible residue that remains after a coal has had the volatiles driven off.
ASH
it conducts a variety of fundamental ash analysis tests including ash elemental tests, ash fusion tests and coal ash analysis.
ULTIMATE ANALYSIS TESTS
Ultimate analysis tests produce more comprehensive results than the proximate analyses. it uses the results from ultimate analysis tests to determine the elemental composition of the coal including moisture, ash, carbon, hydrogen, nitrogen, sulfur, and oxygen (by difference). We determine each element through chemical analysis and express it as a percentage of the total mass of the original coal or coke sample.
hope it helps you :)
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