Question

Asked Nov 27, 2019

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Step 1

Consider a reactor system with feed stream F_{1} consisting of methanol and feed stream F_{2 }consisting of air. The product stream P consist of formaldehyde gas and water. Formaldehyde gas is again reacting with oxygen to form carbon monoxide and water. Reactions are as follows:

Step 2

Assume basis as molar feed rate F_{1}=100 kmol h^{-1}. Molar feed rate of air is twice the molar feed rate of F_{1}, that is 200 kmol h^{-1}. In product stream, consider mole fraction of methanol is n_{1}, mole fraction of formaldehyde is n_{2} and mole fraction of water is n_{3}. Degree of freedom of the system = no of unknown variables + no of chemical reaction – no of mass balance equation – no of equation relating unknown variables.

Step 3

Mole of Oxygen in F2 feed is 21% of the total feed of air e...

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