NOVELTY - Integrated plant, comprises steam explosion unit (108) having input cavity to receive chips of biomass as feedstock, at least one steam supply input, and at least two stages to pretreat biomass for subsequent supply to biomass gasifier (114), where stages use combination of heat, pressure, and moisture that are applied to biomass to make biomass into moist fine particle form. The stages are configured to break down bulk structure of received chips of biomass, at least in part, by applying steam from first steam supply input to degrade bonds between lignin and hemicellulose.    USE - The integrated plant is useful for generating syngas from biomass (claimed).    DETAILED DESCRIPTION - Integrated plant, comprises a steam explosion unit (108) having an input cavity to receive chips of biomass as a feedstock, at least one steam supply input, and at least two stages to pretreat the biomass for subsequent supply to a biomass gasifier (114), where the stages use a combination of heat, pressure, and moisture that are applied to the biomass to make the biomass into a moist fine particle form. The stages are configured to break down a bulk structure of the received chips of biomass, at least in part, by applying steam from a first steam supply input to begin degrading bonds between lignin and hemicellulose from cellulose fibers of the biomass and increase a moisture content of the received chips of biomass, and then, in the stages, steam at least 14 times atmospheric pressure from a second steam supply input is applied to heat and pressurize any gases and fluids present inside the biomass, where at an exit orifice to the stages, the bulk structure of the pressurized biomass is internally blown apart via a rapid depressurization of the biomass. The biomass blown apart produces a fine particle form exiting from the stages having average dimensions of less than 70 microns thick and less than 500 microns in length, and those produced moist fine particles of biomass are subsequently fed to a feed section of the biomass gasifier. The biomass gasifier has a reactor vessel configured to react the biomass in moist fine particle form, which has a decreased particle size and an overall increase in surface area compared to the received chips of biomass in the input cavity, due to being blown apart by the steam explosion unit. The biomass gasifier has a third steam supply input and at least one heat source, and in the presence of the steam the biomass in fine particle form is reacted in the reactor vessel in a rapid biomass gasification reaction to produce at least syngas components, including hydrogen and carbon monoxide, where the steam explosion unit and the biomass gasifier are part of the integrated plant. An INDEPENDENT CLAIM is also included for generating syngas from biomass in an integrated plant, comprising: receiving biomass in chip form (451) as a feedstock to pre-treat the biomass in the stages for subsequent supply to a biomass gasifier; applying a combination of heat, pressure, and moisture to the biomass in the stages to make the biomass into a moist fine particle form, where a steam explosion process in the stages breaks down a bulk structure of the received biomass in chip form, at least in part, by applying steam with a low pressure to begin degrading bonds between lignin and hemicellulose from cellulose fibers of the biomass and increase a moisture content of the received biomass, and then by applying steam with a higher pressure to heat and pressurize any gases and fluids present inside the biomass to internally blow apart the bulk structure of the received biomass in chip form via a rapid depressurization of the biomass with the increased moisture content and degraded bonds, where the biomass produced into the moist fine particle form from a steam explosion unit of the stages has average dimensions of less than 70 microns thick and less than 500 microns in length, and those produced moist fine particles of biomass are subsequently fed to a feed section of the biomass gasifier; and reacting the fine particles of biomass, which have a decreased particle size and an overall increased surface area compared to the received biomass in chip form as feedstock, due to being blown apart by the stages of the steam explosion unit in the biomass gasifier, where in the presence of steam in the biomass gasifier, the particles of the biomass produced by the steam explosion unit are reacted in a rapid biomass gasification reaction to produce at least syngas components, including hydrogen and carbon monoxide, and the steam explosion unit and biomass gasifier are part of the integrated plant.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of steam explosion unit having an input cavity to receive biomass as a feedstock, at least two steam supply inputs, and at least two stages to pretreat the biomass for subsequent supply to a biomass gasifier.    Chipper unit (104)    Explosion unit (108)    Biomass gasifier (114)    Biomass in chip form (451)    Log of biomass (453)