Chemistry - Hydrogen Question with Solution | TestHub

The process of producing syn gas or synthesis gas from coal is called 'coal gasification'.

$\underset{\mathrm{Coal}}{\mathrm{C}\left(\mathrm{s}\right)}+\underset{\mathrm{Steam}}{{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)}\underset{\mathrm{Ni}}{\overset{1270 \mathrm{K}}{\to }}\underset{\mathrm{Synthesis}gas}{\underbrace{\mathrm{CO}\left(\mathrm{g}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right)}}$

The production of hydrogen can be increased by reacting carbon monoxide of the syn gas with steam in the presence of iron chromate as a catalyst at $673 \mathrm{K}$.

$\mathrm{CO}\left(\mathrm{g}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)\stackrel{{\mathrm{FeCrO}}_4, 673 \mathrm{K}}{⟶}{\mathrm{CO}}_2\left(\mathrm{g}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right)$

${\mathrm{CO}}_2$ is removed by scrubbing with a solution of sodium arsenite.