TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The methane removal unit, the first and second methane removal units, the methane removal unit, the first and second methane removal units, or the first, second and third methane removal units are arranged: to separate and recover methane from the acid gas-depleted gas stream and to produce a methane-depleted gas stream and a methane product stream; to separate and recover methane from the first and second acid gas-depleted gas streams and to produce a methane-depleted gas stream and a methane product stream; to separate and recover methane from the first and second acid gas-depleted gas streams and to produce first and second methane-depleted gas streams and first and second methane product streams; to separate and recover methane from the first, second and third acid gas-depleted gas streams and to produce a single methane-depleted gas stream and a single methane product stream; to separate and recover methane from the first, second and third acid gas-depleted gas streams and to produce first and second methane-depleted gas stream and first and second methane product streams; or to separate and recover methane from the first, second and third acid gas-depleted gas streams and to produce first, second and third methane-depleted gas streams, and a first, second and third methane product streams, when only the acid gas-depleted gas stream is present, the first and second acid gas-depleted gas streams are present, or the first, second and third acid gas-depleted gas streams are present respectively. A single steam source, first and second steam sources, or first, second and third steam sources are arranged to supply steam to the first, second and third gasifying reactor units. When the first, second and third catalyst loading units are present respectively, the carbonaceous material processing unit, the processing unit, or the first, second and third processing units are arranged to supply carbonaceous particulates (20) to the loading tank of the catalyst loading units, or to supply the particulates to the tanks of the first and second catalyst loading units, or to supply the carbonaceous particulates to the tanks of the first, second and third catalyst loading units respectively. The heat exchanger unit, the first and second heat exchanger units, or the first, second and third heat exchanger units are arranged to remove heat energy from the hot first gas streams from the gasifying reactor units to generate steam and to produce a single cooled first gas stream, or to remove heat energy from the hot first gas streams from the gasifying reactor units to generate steam and produce first and second cooled first and second gas streams, or to remove heat energy from the hot first gas stream from the gasifying reactor units to generate steam and produce first, second and third cooled first, second and third gas streams respectively.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred components: The gaseous products comprise methane, hydrogen, carbon monoxide, carbon dioxide and hydrogen sulfide. The acid gas-depleted gas streams comprise methane, hydrogen and carbon monoxide from the cooled gas streams. The trace contaminants comprise carbonyl sulfide, mercury and hydrogen cyanide.