GATE CE 2020 Set 2 — Question 63
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Environmental Engineering → Municipal Solid Waste → Incineration
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Question
A waste to energy plant burns dry solid waste of composition: Carbon = 35%, Oxygen = 26%, Hydrogen = 10%, Sulphur = 6%, Nitrogen = 3% and Inerts = 20%. Burning rate is 1000 tonnes/d. Oxygen in air by weight is 23%. Assume complete conversion of Carbon to , Hydrogen to , Sulphur to and Nitrogen to .Given Atomic weights: H = 1, C = 12, N = 14, O = 16, S = 32The stoichiometric (theoretical) amount of air (in tonnes/d, round off to the nearest integer) required for complete burning of this waste, is ________.
Correct answer
6963 to 6967
Solution
1.Calculate the mass of each component in 1000 tonnes of waste:
- Carbon (C):
- Hydrogen (H):
- Sulphur (S):
- Nitrogen (N):
- Oxygen (O) already present:
- :
- :
- :
- :
4.Net required from air = Total - in waste = .
5.Stoichiometric air required = .
Rounding to the nearest integer gives 6965.Continue learning with Success Tracker
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