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How to prepare hydrogen gas from coal (w...

How to prepare hydrogen gas from coal (water gas) ?

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Step 1 : Steam is passed through coke at 1270 K and Ni as catalyst gives water gas `[CO+H_(2)]`
`underset(coke)C+underset("steam")(H_(2)O)underset(Ni)overset(1270K)tounderset("water gas")ubrace(Co(g)+H_(2)(g))`
Step 2 : Steam is passed through water gas in presence of `Fe_(2)O_(3)+Cr_(2)O_(3)` catalyst at 773 K gives hydrogen.
`underset("Water gase")(CO+H_(2))+underset("Steam")(H_(2)O)underset(773K)overset(Fe_(2)O_(3)+Cr_(2)O_(3))toCO_(2)+2H_(2)`
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