COAL CONVERSION PROCESS

An improved gasification process for solid carbonaceous materials wherein reactor volume is reduced by elevating either the point or points at which the solid carbonaceous feed is introduced, the point or points wherein hydrogen and carbon monoxide are introduced or the point or points at which both the solid carbonaceous feed and the carbon monoxide and hydrogen are introduced. When the points of feed introduction and the points of carbon monoxide and hydrogen introduction are elevated, the reduction in volume is greater than would have been predicted from a relocation of either of these points separately.