NOVELTY - Gasification system comprises gasifying reactors (301-304), catalyst loading units (201-204), carbonaceous material processing unit(s), heat exchangers (401-404), acid gas remover (500), methane removal unit (600), and steam sources (701, 702). Each gasifying reactor unit comprises reaction chamber and fines remover unit. The acid gas remover unit removes substantial portion of carbon dioxide and of hydrogen sulfide from the cooled gas stream to produce acid gas-depleted gas stream comprising methane and hydrogen, and optionally carbon monoxide.    USE - A gasification system for generating gases (particularly methane) from catalyzed carbonaceous feedstock, e.g. coal or petroleum coke.    ADVANTAGE - The system has increased efficiency and component utilization, and minimizes losses in overall production capacities. The system has multiple gasification reactors which share one or more unit operations to facilitate routine maintenance or repair while maintaining systems operations, with improved operating efficiency and control of the overall system.    DETAILED DESCRIPTION - A gasification system comprises four gasifying reactor units (301-304), catalyst loading units (201-204), carbonaceous material processing unit(s), heat exchangers (401-404), acid gas remover (500), methane removal unit (600), and steam sources (701, 702). Each gasifying reactor unit comprises reaction chamber in which a catalyzed carbonaceous feedstock and steam are converted into gaseous products; feed inlet for the catalyzed carbonaceous feedstock; steam inlet; hot gas outlet; char outlet; and fines remover unit. The gaseous products comprise methane, hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide and unreacted steam; unreacted carbonaceous fines; and solid char product comprising entrained catalyst. Each catalyst loading unit independently comprises loading tank, and dryer to thermally treat the catalyzed carbonaceous feedstock to reduce moisture content. The carbonaceous material processing unit comprises a receiver of carbonaceous material, and grinder. The heat exchanger unit removes the heat energy from the hot gas streams from the gasifying reactor units to generate steam, and produce cooled gas stream. The acid gas remover unit removes substantial portion of carbon dioxide and of hydrogen sulfide from the cooled gas stream to produce acid gas-depleted gas stream comprising methane and hydrogen, and optionally carbon monoxide. The methane removal unit separates and recovers methane from the acid gas-depleted gas stream to produce methane-depleted gas stream and methane product stream. The steam source supply steam to gasifying reactor units. The gasification system further comprises trace contaminant removal unit to remove trace contaminants comprising carbon oxysulfide, mercury and hydrogen cyanide from the cooled gas stream(s); reformer unit to convert the methane product stream into syngas; methane compressor unit; carbon dioxide recovery unit; sulfur recovery unit to extract and recover sulfur from hydrogen sulfide removed by acid gas remover unit; catalyst recovery unit to extract and recover entrained catalyst from solid char product and recycle the recovered catalyst to catalyst loading unit; gas recycle loop to recycle methane-depleted gas stream to gasifying reactor units; wastewater treatment; steam superheater; steam turbine; and sour shift unit to contact a cooled gas stream with aqueous medium to convert carbon monoxide in the cooled gas stream into carbon dioxide.    DESCRIPTION OF DRAWING(S) - The drawing shows a diagram of the gasification system.    Catalyst loading units (201-204)    Gasifying reactors (301-304)    Heat exchangers (401-404)    Acid gas remover (500)    Methane removal unit (600)    Steam source (701, 702)