Scribd
Upload
16 views3 pages

Problem Sheet 6

The document outlines a problem sheet focused on the construction of process flow sheets and the study of material and energy balances for various chemical processes without recycle. It includes calculations for the oxidation of sulfur dioxide, combustion of carbon monoxide, and the oxychlorination of ethylene, providing results for heat duties and compositions of reactants and products. Key results include heat absorbed in a heat exchanger and the moles and mass of reactants and products for the processes described.

Uploaded by

adityasingh273158
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
16 views3 pages

Problem Sheet 6

The document outlines a problem sheet focused on the construction of process flow sheets and the study of material and energy balances for various chemical processes without recycle. It includes calculations for the oxidation of sulfur dioxide, combustion of carbon monoxide, and the oxychlorination of ethylene, providing results for heat duties and compositions of reactants and products. Key results include heat absorbed in a heat exchanger and the moles and mass of reactants and products for the processes described.

Uploaded by

adityasingh273158
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
You are on page 1/ 3

Problem Sheet 6

Construction of process flow sheet and study of material and energy balances for the process
without recycle.

(1) (a) Sulphur dioxide is oxidised to sulphur trioxide in 100% excess air. 90% conversion of SO2 is
achieved in the reactor. The gases enter the converter at 400 0C and leave at 450 0C. The
convertor is operated in the isothermal mode. How many kilocalories/hour are absorbed in the
heat exchanger of the converter per kilogram-mole of SO2 introduced?

(b) What is the value of heat duty if reactor is operated adiabatically? Note the temperature of

the product stream.

Result: -149kilocalories/h

Result: 1353.750C
Ques(2) Carbon mono oxide at 200 0C is burned under atmospheric pressure with dry air at
5000C in 90% excess of that theoretically required. The products of combustion leave the reaction
chamber at 1000 0C. The reactor is operated in the isothermal mode. Find the heat evolved in the
reaction chamber in kcal per kilogram-mole of CO burned, assuming
(a) complete combustion
(b) 80% conversion of CO.

Result: (a) -67591.6 kcal/kg.kmol


(b) kcal/Kg.kmol

Ques(3) Ethylene dichloride is manufactured by the oxychlorination of ethylene:

2𝐶2𝐻4 + 4𝐻𝐶𝑙 + 𝑂2 → 2𝐶2𝐻4𝐶𝑙2 + 𝐻2𝑂


Ethylene and air are supplied in excess of 5% and 10% respectively, than what is required for
complete conversion of hydrogen chloride. The conversion attained is 90%.
For 500 kmol of HCl supplied, calculate the following using a stoichiometric reactor:
(i) the moles of reactants and products
(ii) the mass of reactants and products
(iii) the composition of the reactant stream in weight percent
(iv) the composition of the product stream in weight percent
Result: (ii) Reactant product:

Ethylene = 7364.1Kg/h Ethylene=7364.171Kg/h

Hydrogen Chloride= 18230.4Kg/h Hydrogen Chloride= 1002.67Kg/h

Air= 3980.727Kg/h Air=560.925Kg/h

Etylene Di Chloride=0 Kg/h Ethylene Di Chloride =23379.05Kg/h

Water = 0 Kg/h water = 4256.011Kg/hr

(i)

Reactant Product

Ethylene = 263 Kmol/h Ethylene=263.00Kmol/h

Hydrogen Chloride= 506.4 Kmol/h Hydrogen Chloride=27.85Kmol/h

Air= 137.45 Kmol/h Air=19.34Kmol/h

Etylene Di Chloride= 0 Ethylene Di Chloride =233.7Kmol/h

Water = 0 water= 236.44Kmol/hr

(iii) Weight composition of reactant stream (iv) Weight composition of product stream

Ethylene = 24.899 % Ethylene=20.14%

Hydrogen Chloride= 61.6% Hydrogen Chloride=2.74%

Air=13.4 % Air= 1.534%

Etylene Di Chloride= 0 % Ethylene Di Chloride = 63.94

Water = 0% Water= 11.6%

You might also like