$100\%$ Formaldehyde $(C{H}_{2}O)$ is produced from methanol $(C{H}_{3}OH)$ through the recycle process. Its single pass conversion is $80\%.$ All non$-$reacting methanol in the outflow from the reactor is separated from formaldehyde and $H_2$ in separator and is recycled to the reaction with fresh feed. Calculate the mass flow rate $(k\frac{g}{s})$ of $($a$)$ the methanol stream of the fresh feed and $($b$)$ the recycling stream to produce formaldehyde at $90k\frac{g}{s}.(20$ pts$)$

Answer:

$100\%$ Formaldehyde $(C{H}_{2}O)$ is produced from methanol $(C{H}_{3}OH)$ through the recycle process. Its single pass conversion is $80\%.$ All non$-$reacting methanol in the outflow from the reactor is separated from formaldehyde and $H_2$ in separator and is recycled to the reaction with fresh feed. Calculate the mass flow rate $(k\frac{g}{s})$ of $($a$)$ the methanol stream of the fresh feed and $($b$)$ the recycling stream to produce formaldehyde at $90k\frac{g}{s}.(20pts)$