It is exothermic process.
Heavy oil ---------Cracking-------Gasoline
Water gas (CO+H2) produced by passing steam over
heated coke.
Mixed with Hydrogen.
Gas purified by passing through Fe2O3
( to remove H2S),then Fe2O3 +Na2CO3
( to remove organic sulphur compounds).
Purified gas compressed to (5-25 atm.) and then led through
a convertor, maintained at about 200-300oC
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