Ultimate analysis determines the _______________ content of coal?
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Answer: A. Carbon, hydrogen, nitrogen & sulphur
Explanation
Ultimate analysis breaks down organic coal matter into its fundamental chemical elements for mass balances. The primary elements measured include carbon, hydrogen, nitrogen, sulfur, and organically bound oxygen. This elemental data is essential for calculating theoretical air requirements and combustion product compositions. Ultimate analysis differs from proximate analysis, which measures empirical physical fractions like moisture and ash. Combustion stoichiometry relies entirely on elemental mass percentages obtained from standard ultimate testing. Sulfur and nitrogen fractions help environmental engineers predict sulfur dioxide and nitrogen oxide emissions.
Power plant operators use ultimate analysis results to design effective flue gas desulfurization scrubber systems. Environmental compliance reports require accurate elemental fuel data to calculate greenhouse gas emission inventories. Boiler efficiency calculations incorporate ultimate analysis to determine accurate dry gas sensible heat losses. Option carbon, ash, sulfur, nitrogen is incorrect because ash is a mineral residue measured in proximate analysis. Option carbon, sulfur, volatile matter, ash mixes ultimate elemental assays with proximate fractions. Option carbon, volatile matter, ash, moisture describes proximate analysis parameters rather than ultimate chemistry.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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