Q$2$: A gas absorption tower of diameter $2m$ contains

ceramic Raschig rings randomly packed to a height of $5$

$m.$ Air containing a small proportion of sulphur dioxide

passes upwards through the absorption tower at a flow

rate of $6\frac{m^3}{s}.$ The viscosity and density of the gas may

be taken as $1\mathrm{.}8010-5$ Pas and $1\mathrm{.}2k\frac{g}{m}3$ respectively.

Details of the ceramic raschig rings packing is given

:below

Surface area per unit volume of packed bed, $S_B=190$

$.\frac{m^2}{m^3}$

Voidage of randomly packed bed $=0\mathrm{.}71$

Calculate the diameter, $x_{sv},$ of a sphere with the $($a$)$

$.$same surface$-$volume ratio as the Raschig rings

Calculate the frictional pressure drop across the $($b$)$

$.$packing in the tower