The fuel gas containing $80$ mole $\%C{H}_4$ and $20$ mole $\%C_2{H}_6,$ is fed to a furnace for

combustion where it is burned with $55\%$ excess air. The combustion of methane $(C{H}_4)$

ethane $(C_2{H}_6)$ is complete, and the fractional conversion of $C{H}_4$ is $0\mathrm{.}90,$ which is the same

as that of $C_2{H}_6.$

Calculate the following:

$($a$)$ Draw and complete the block flow diagram for the process with correct reactions

and correct input and output stream labelled.

$($b$)$ The molar flow rate of air supplied to the furnace if $100$ moles of fuel gas was fed

to the furnace;

$($c$)$ The dry basis composition of the stack gas leaving the furnace.Q$2.$ The fuel gas containing $80$ mole$\%$CH$4$ and $20$ mole$\%$C$2$H$6,$ is fed to a furnace for

combustion where it is burned with $55\%$ excess air. The combustion of methane $($CH$4)$

ethane $($C$2$H$6)$ is complete, and the fractional conversion of CH$4$ is $0\mathrm{.}90,$ which is the same

as that of C$2$H$6.$

Calculate the following:

$($a$)$ Draw and complete the block flow diagram for the process with correct reactions

and correct input and output stream labelled.

$($b$)$ The molar flow rate of air supplied to the furnace if $100$ moles of fuel gas was fed

to the furnace;

$($c$)$ The dry basis composition of the stack gas leaving the furnace.