Gasification process with zinc condensation on the carbon source

Abstract From the Canadian patent

In a process for gasifying solid carbon sources such as coal utilizingzinc oxide as the oxygen donor the carbon sources is first contacted in a preheat zone with product gas; any zinc in this product gas is condensed on the carbon source; the preheated carbon source and zinc are then exposed to steam whereby the zinc is oxidized to zinc oxide; the mixture of zinc oxide and carbonsource finally is reacted at elevated temperature conditions to form a gas comprising carbon monoxide and zinc.