A sample of natural gas containing 80% methane (CH4) and rest nitrogen (N2) is burnt with 20% excess air. With 80% of the combustibles producing CO2 and the remainder going to CO, the Orsat analysis in volume percent is_________________?
Correct answer: B. CO2 : 7.42, CO : 1.86, O2 : 4.64, N2:86.02
- A. CO2 : 6.26, CO : 1.56, O2 : 3.91, H2O :15.66, N2 : 72.60
- B. CO2 : 7.42, CO : 1.86, O2 : 4.64, N2:86.02
- C. CO2 : 6.39, CO : 1.60, O2 : 3.99, H2O:25.96, N2:72.06
- D. CO2 : 7.60, CO : 1.90, O2 : 4.75, N2 : 85.74
Explanation
For 100 mol of fuel, 64 mol CH₄ form CO₂ and 16 mol form CO; with 20% excess air, the dry products are approximately CO₂ 7.42%, CO 1.86%, O₂ 4.64% and N₂ 86.02%. Orsat analysis is reported on a dry basis, so water vapour is omitted.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Chemical Process Principles
2,710 free Chemical Process Principles MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Chemical Process Principles questions
Softening temperature of coal ash is a measure of the _____________ of coal?
Calorific value of coke even gas produced by low temperature carbonisation of coal is about ____________ Kcal/Nm3?
During combustion of coal on grate, clinker formation is increased by the___________________?
Higher fuel combustion efficiency cannot be achieved by_________________?
Tolerable concentration of toxic carbon monoxide in atmospheric air is about ______________ ppm?
Which of the following combustibles is absent in blast furnace gas ?