The initial water concentration in the gas was $c_o=926{10}^{-6}kg$ water $\frac{?}{kg}$

nitrogen. The breakthrough data are as follows.

A value of $\frac{c}{c_o}=0\mathrm{.}02$ is desired at the break point. Do as follows.

$($a$)$ Determine the break$-$point time, the fraction of total capacity used up to

the break point, the length of the unused bed, and the saturation loading

capacity of the solid.

$($b$)$ For a proposed column length $H_T=0\mathrm{.}40m,$ calculate the break$-$point

time and fraction of total capacity used.

Ans. $($a$)t_b=9\mathrm{.}58h,$ fraction used $=0\mathrm{.}87812\mathrm{.}3-2.$ Drying of Nitrogen and Scale$-$Up of Column. Using molecular sieves, water

vapor was removed from nitrogen gas in a packed bed $($C$3)$ at $28\mathrm{.}3C.$ The

column height was $0\mathrm{.}268m,$ with the bulk density of the solid bed being equal

to $712\mathrm{.}8k\frac{g}{m^3}.$ The initial water concentration in the solid was $0\mathrm{.}01kg$

water $\frac{?}{kg}$ solid and the mass velocity of the nitrogen gas was $4052k\frac{g}{m^2}*h.$