In a flue gas desulphurization process, a limestone $(CaC{O}_3)$ slurry with a solid concentration of $20\%$ is used. The flue gas flow rate is $30,000\frac{m^3}{h},$ and the inlet $S{O}_2$ concentration is $4000ppm.$ If the system achieves an $S{O}_2$ removal efficiency of $90\%,$ calculate the mass flow rate of limestone $($in $k\frac{g}{h})$ required for the process. $[10$ marks$]$

A power plant has a flue gas flow rate of $80,000\frac{m^3}{h}$ and an $S{O}_2$ concentration of $5000ppm.$ The plant plans to install a dry scrubbing system using sodium bicarbonate $(NaHC{O}_3)$ as the sorbent. The required stoichiometric ratio $(N\frac{a}{S})$ is $1\mathrm{.}2.$ Calculate the mass flow rate of sodium bicarbonate $($in $k\frac{g}{h})$ required for achieving an $S{O}_2$ removal efficiency of $80\%.[10$ marks$]$