How can the production of dihydrogen,obtained from 'coal gasification',be increased?

(N/A) The production of dihydrogen from 'coal gasification' (syngas) can be increased by reacting the carbon monoxide present in the syngas mixture with steam in the presence of iron chromate $(FeCrO_4)$ as a catalyst. This process is known as the 'water-gas shift reaction'.
The chemical equation for this reaction is:
$CO_{(g)} + H_2O_{(g)} \xrightarrow{673 \ K, \text{FeCrO}_4} CO_{2_{(g)}} + H_{2_{(g)}}$