EXAMPLE $9\mathrm{.}5-4$ Simultaneous Material and Energy Balances

The ethanol dehydrogenation reaction of Example $9\mathrm{.}5-3$ is carried out with the feed entering at $300C.$ The feed contains $90\mathrm{.}0$ mole $\%$ ethanol and the balance acetaldehyde and enters the reactor at a rate of $150mo\frac{l}{s}.$ To keep the temperature from dropping too much and thereby decreasing the reaction rate to an unacceptably low level, heat is transferred to the reactor. When the heat addition rate is $2440kW,$ the outlet temperature is $253C.$ Calculate the fractional conversion of ethanol achieved in the reactor.

SOLUTION

Table B$.8$ Specific Enthalpies of Selected Gases: SI Units

$\backslash$table$[[$Reference state: Gas, $P_{\text{r}\text{e}\text{f}}=1$atm,$T_{\text{r}\text{e}\text{f}}=25C$