Ethyl alcohol in a CO$2-$rich vapor stream is recovered by absorption with water in a sieve$-$tray tower. Assuming isothermal, isobaric conditions and that only alcohol is absorbed$.$ The entering feed gas is $180$ kmol$/$h; $95\%$ CO$2,5\%$ ethyl alcohol; $30\backslash$deg C$,110$ kPa. The entering liquid absorbent is $100\%$ water: $30\backslash$deg C$,110$ kPa.

You desire a recovery $($absorption$)$ of ethyl alcohol is $80\%.$

The vapor pressure of CO$2$ at $30\backslash$deg C is $11$ kPa. Assume the gas and liquid both behave as ideal.

Water flow is $1\mathrm{.}5$ x L$$min$.$

Assume the packing materials provide $3$ ft$2$ cross$-$sectional area $($S$).$ A gas phase film mass transport resistant is domi

a$.$ Find H$($OG$)$

b$.$ Find N$($OG$)$

C$.$ Deteremine height of absorption tower

d$.$ discuss relationship between N$($og$)$ and N$($t$)$