TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The reactor is a gasifier or an oxygen combuster. The steam is generated within the reactor.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The heat energy is transferred to a heat exchanger which generates steam upon contact with water. The process further comprises: dividing the steam into a first steam stream and a second steam stream; introducing the first steam stream, the first gas stream, a second carbonaceous feedstock and an alkali metal gasification catalyst to a gasifier; introducing the second steam stream to a steam turbine to generate electricity; and reacting the second carbonaceous feedstock in the gasifier in the presence of the steam and the alkali metal gasification catalyst under suitable temperature and pressure to form a second gas stream comprising the gaseous products. Preferred Components: The third gas stream includes substantially all of the carbon dioxide formed in steps (b) and (e). The first carbonaceous feedstock is in a form of aqueous slurry. The first, second or both carbonaceous feedstocks comprise biomass. The first gas stream further comprises carbon monoxide and hydrogen. The gasification catalyst comprises a source of at least one alkali metal and is present in an amount sufficient to provide, in the biomass feedstock, ratio of alkali metal atoms to carbon atoms of 0.01-0.08. The fourth gas stream comprises a predominant amount of methane. EXAMPLE - Coal (Powder River basin) was stage-crushed to maximize the amount of material (particle sizes of 0.85-1.4 mm). Fines (less than 0.85 mm) were separated from the crushed materials by vibratory screening and directed to the steam generating combustion reactor. The crushed coal was slurried with an aqueous solution of potassium carbonate, dewatered, and dried via fluid bed slurry drier to typically yield a catalyzed feedstock containing 185 lb coal (88 wt.%), 14.9 lb catalyst (7 wt.%), and 10.5 lb moisture (5 wt.%). The coal fines were separated at the crushing stage. The obtained coal fines were provided to a combustion reactor fed by an enriched oxygen source. The resulting exhaust gas from the combustion reactor contained hot carbon dioxide. The exhaust gas was passed through a heat exchange in contact with a water source to produce steam. The generated steam and the exhaust gas from the combustion reactor was superheated and then introduced to a fluidized bed gasification reactor (catalytic gasifier) supplied with the catalyzed feedstock. The catalyzed feedstock was introduced under a positive pressure of nitrogen. Typical conditions for the catalytic gasifier was a total pressure of 500 psi and temperature of 1200 degrees F. The effluent of the catalytic gasifier containing methane, carbon dioxide, hydrogen, carbon monoxide, water, hydrogen sulfide, ammonia and nitrogen, were passed to a scrubber to remove ammonia and to an acid gas removal unit to remove hydrogen sulfide and carbon dioxide. The carbon dioxide was then recovered.