$\backslash$table$[[$Q$.1,$Acetaldehyde can be produced from ethanol in the following reaction:$]]$

Unfortunately, acetaldehyde is oxidized further to carbon dioxide:

$C{H}_{3}CH{O}_{(R)}+\frac{5}{2}{O}_{2}k2C{O}_2+2H_{2}O.$

The oxygen excess is large, and this is why reaction $(1)$ and $(2)$ can be considered to follow the first order kinetics in terms of ethanol and acetaldehyde, respectively. Since the ethanol concentration in the process is low at the reactor inlet