NOVELTY - Feedstock and oxidant are combined in a fluidized reaction zone to provide syngas. Heat is indirectly exchanged in zone (220) from syngas to a condensate to provide steam and cooled syngas. Heat is exchanged in zone (230) from cooled syngas to portion(s) of steam produced in zone (220) to provide superheated steam and cooled syngas. Heat is exchanged in zone (240) from cooled syngas to heat transfer medium to provide condensate and cooled syngas. Portion(s) of superheated steam produced in zone (230) is supplied to steam turbine (285) to produce power.    USE - Production of syngas and power. Syngas is used as fuel to generate electricity or steam, as source of hydrogen, and as raw material in production of fuels, chemicals, fertilizers, and industrial gases.    ADVANTAGE - The process enables efficient production of syngas with effective utilization of produced heat. The sorbent delays or prevents the oxygen from reaching a concentration which can result in undesirable side reactions with hydrogen from feedstock within the gasifier.    DETAILED DESCRIPTION - Feedstock(s) and oxidant(s) are combined in a fluidized reaction zone operated at 550-1050 degrees C to provide a syngas. Heat is indirectly exchanged in zone (220) from the syngas to a condensate to provide steam and a cooled syngas having temperature (I). Heat is exchanged indirectly in zone (230) from the syngas cooled in zone (220) to portion(s) of steam produced in zone (220) to provide superheated steam and a cooled syngas having temperature (II). Heat is exchanged indirectly in zone (240) from the syngas cooled in zone (230) to a heat transfer medium consisting of water to provide the condensate and a cooled syngas having temperature (III). Portion(s) of superheated steam produced in zone (230) is supplied to steam turbine(s) to produce power. Portion(s) of condensate provided in zone (240) is supplied to zone (220) for indirect heat exchange with syngas. The process further involves converting portion(s) of the cooled syngas to methanol, alkylformates, dimethylether, ammonia, one or more Fischer-Tropsch products, and/or their derivatives. Sorbent(s) containing limestone and/or dolomite is combined with the feedstock. The feedstock comprises biomass, coal, oil shale, coke, tar, asphaltenes, low ash polymers, no ash polymers, hydrocarbon-based polymeric materials, biomass derived material, by-product derived material from manufacturing operations, their derivatives, and/or their mixtures. The oxidant comprises air, oxygen, essentially oxygen, oxygen-enriched air, mixtures of oxygen and air, and/or mixtures of oxygen and inert gas. The feedstock comprises polymer, biomass and coal. An INDEPENDENT CLAIM is included for system for producing syngas and power.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the system used for recovering heat from syngas and producing power.    Gasifier (100)    Heat-exchanging zones (220,230,240)    Separator (260)    Steam turbine (285)    Generator (295)