Patent ID: 7056487

Claim:
A process for cleaning feedstock gas, comprising: producing a feedstock gas; passing the feedstock gas at a first temperature to at least one first filter vessel where at least a portion of particulates contained in the feedstock gas in the at least one first filter vessel and at least a portion of at least one halide contained in the feedstock gas in the at least one first filter vessel are removed from the feedstock gas by contacting the feedstock gas with at least one sorbent capable of removing at least one halide from the feedstock gas; passing the feedstock gas to a bulk desulfurization system where at least a portion of sulfur contained in the feedstock gas in the bulk desulfurization system is removed by contacting the feedstock gas with at least one sorbent capable of removing sulfur from the feedstock gas; passing the feedstock gas at a second temperature that is less than the first temperature to at least one second filter vessel where a portion of at least one contaminant contained in the feedstock gas in the at least a one second filter vessel is removed by contacting the feedstock gas with at least one sorbent; and passing the feedstock gas at a third temperature that is less than the second temperature to at least one third filter vessel where a portion of at least one contaminant contained in the feedstock gas in the at least one second filter vessel is removed by contacting the feedstock gas with at least one sorbent.