Patent ID: 8480771

Claim:
A gasification process for making producer gas comprising: supplying a consistent quality raw carbon source material; adjusting impurity content of the raw carbon source material to within an acceptable consistent range of impurity content, wherein adjusting impurity content of the raw carbon source material comprises measuring ash content of the batch of raw carbon source material, comparing the measured ash content to a predetermined acceptable range of ash content values for an intended use of the producer gas to be formed, and if the measured ash content is within the acceptable range, accepting the batch of raw carbon source material for supplying to the gasification generator, and if the ash content is outside of the acceptable range, adjusting the ash content to within the acceptable range; heating the raw carbon source material in a non-oxidizing environment to remove volatile hydrocarbon constituents and to produce a devolatilized carbon source material; and gasifying the devolatilized carbon source material by heating the devolatilized carbon source material to a gasification temperature in a gasification generator, supplying steam, and supplying enhanced oxygen content air to react in the gasification generator and to thereby form consistent, high energy value, and low impurity producer gas.