Roll No: __________________
CL 152: Introduction to Chemical Engineering
Quiz-2 (Announced), 20th February, 2020
Duration 1 hour
Total Marks: 20
Instructions:
1. Please return your question paper (writing your roll no.) with the answer sheet.
2. Weightage for numerical accuracy is 20%
3. This is closed book/notes pre-announced quiz.
1. The composition of the product gas from a solid fuel (a hydro carbon with tracer amount
of sulphur) combustion reaction is as follows. 72% CO2, 2.57% CO, 0.0592% SO2 and
25.4% O2. Pure O2 is feed to the furnace in 20% excess of that required to burn the fuel
completely. There is no oxygen in the fuel. Calculate the elemental composition (mol%
of the elements) of the fuel. [4]
2. Consider that the following reaction is started with 50 g of H2O2 and 25 grams of O3
H2O2+ O3 ------------------ H2O+ O2
If 25 mol % of O3 is consumed, find out the molar extent of reaction and the changes in
the moles of all the other species. [4]
3. Methanol is produced by reacting carbon monoxide and hydrogen. A fresh feed stream
containing CO and H2 joins a recycle stream and the combined stream is fed to the
reactor. The reactor outlet stream flows at a rate of 350 mol/min and contains 10.6 wt%
H2, 64 wt% CO, and 25.4 wt% CH3OH. This stream is then cooled in a cooler in which
most of the methanol is condensed. The liquid methanol is taken out as product and the
gas stream leaving the condenser which contains CO, H2, and 0.40 mole% uncondensed
vapour of CH3OH is recycled and mixed with the fresh feed. [2+4+2+4]
a) Draw the flow chart of the process.
b) Find out the molar flow rate of CO and H2 in the fresh feed.
c) The production rate of liquid methanol.
d) Single pass and overall conversion of carbon monoxide
CL 152: Introduction to Chemical Engineering
Quiz-2 (Announced), 20th February, 2020
Duration 1 hour
Total Marks: 20
Instructions:
1. Please return your question paper (writing your roll no.) with the answer sheet.
2. Weightage for numerical accuracy is 20%
3. This is closed book/notes pre-announced quiz.
1. The composition of the product gas from a solid fuel (a hydro carbon with tracer amount
of sulphur) combustion reaction is as follows. 72% CO2, 2.57% CO, 0.0592% SO2 and
25.4% O2. Pure O2 is feed to the furnace in 20% excess of that required to burn the fuel
completely. There is no oxygen in the fuel. Calculate the elemental composition (mol%
of the elements) of the fuel. [4]
2. Consider that the following reaction is started with 50 g of H2O2 and 25 grams of O3
H2O2+ O3 ------------------ H2O+ O2
If 25 mol % of O3 is consumed, find out the molar extent of reaction and the changes in
the moles of all the other species. [4]
3. Methanol is produced by reacting carbon monoxide and hydrogen. A fresh feed stream
containing CO and H2 joins a recycle stream and the combined stream is fed to the
reactor. The reactor outlet stream flows at a rate of 350 mol/min and contains 10.6 wt%
H2, 64 wt% CO, and 25.4 wt% CH3OH. This stream is then cooled in a cooler in which
most of the methanol is condensed. The liquid methanol is taken out as product and the
gas stream leaving the condenser which contains CO, H2, and 0.40 mole% uncondensed
vapour of CH3OH is recycled and mixed with the fresh feed. [2+4+2+4]
a) Draw the flow chart of the process.
b) Find out the molar flow rate of CO and H2 in the fresh feed.
c) The production rate of liquid methanol.
d) Single pass and overall conversion of carbon monoxide
