NOVELTY - Two-stage process unit to convert biomass to syngas involves: introducing steam into gasifier (10) with bed of fluidized solids (200) at 1000-1600 degrees F; adding particulate biomass for conversion to syngas and carbon-rich particulate; pulsing oxygen to maintain temperature to 1000 to not greater than 1600 degrees F; forming solids-free syngas; transporting carbon-rich particulate to combustor (20); adding fluidizing gas to second stage to form fluidized biomass particulates (230) at greater than or equal to 50 degrees F greater than that first stage to not greater than 2000 degrees F; returning at least some solids to first stage; and removing excess solids.    USE - As two-stage process unit to convert biomass feedstock to syngas (claimed).    ADVANTAGE - The two-stage process unit for forming syngas provides process, where first stage is gasification and second stage is combustion, and provides more efficient processes to convert biomass to syngas using gasification for at least one stage. In gasification stage, biomass be reduced in size by torrefying it at moderate temperatures in oxygen-free atmosphere, which increases energy density of cellulosic materials by decomposing fraction of hemicelluloses that is reactive ad also celluloses. The energy content per unit mass of torrefied product is increased (90% of feedstock) or higher than feedstock. Further, much of energy lost during torrefaction is in off-gas (tor-gas) that contains combustibles, which can be burned to provide some of heat required by torrefaction. During torrefaction, biomass properties are changed, which results in better fuel quality for combustion and gasification, where torrefied biomass is not pelletized, but is instead reduced to particle size for use in a fluid-bed gasifier i.e. 1-300 microns. If torrefaction is not used then particle size range is as high as 3 inches. Thus particle size reduction of the process is as a result of chemical action rather than mechanical actions as in grinding. Overall, process uses less electrical power to achieve desired degree of size reduction. The solid product of torrefaction can result in char during gasification and can contribute to heat balance needed for gasifier. Further, torrefaction converts wide array of cellulosic biomass into particulate matter having similar properties. Hence, if desired, severity of torrefaction process can be altered to produce a torrefied product having same energy content as that produced from completely different biomass feedstock. This has implicit advantages in design of gasifier feed system and greatly simplifies gasifier operation with respect to controlling H2:CO ratio in syngas. In addition, by selectively removing carboxylates in torrefaction unit, it is believed that less methane will be produced as result of decarboxylation and fewer tars will be formed during gasification by reactions between aldehydes produced from these carboxylic acids and phenols derived from lignin. Also, torrefaction results in reduced amount of phenolic intermediates resulting in less tar formation. Thus, as presently there is no commercial biomass high-pressure gasification, conventional low-pressure gasifiers require very expensive and most often (economically) prohibitive gas compression step. As a result, high pressure gasifier system of the two-stage unit substantially decreases size of, and preferably eliminates compression step typically required for post-gasifier conversion processes.    DETAILED DESCRIPTION - Two-stage process unit to convert biomass feedstock to syngas, involves: introducing steam into gasifier stage (10) containing bed of fluidized solids (200); introducing fluidizing gas through first nozzles (210) located at bottom of first stage containing bed of solids, to result in and maintaining fluidized bed of solids; operating first stage at 1000-1600 degrees F; introducing biomass feedstock having organic fraction and inorganic fraction, in particulate form, into first stage containing fluidized bed of solids, where residence time of biomass in first gasification reactor is effective residence time that will result in conversion of greater than or equal to 90% of the organic fraction to gaseous products, to result in syngas product stream and carbon-rich particulate product; pulsing oxygen through nozzles into first stage, where pulsing is preformed to maintain temperature of first stage to 1000 degrees F to not greater than 1600 degrees F, and to keep the partial oxidation zone of nozzles below fusion temperature of inorganic fraction of biomass, where nozzles are divided into at least one set with each set pulsing oxygen at same or at different frequency of time; passing at least fraction of syngas phase product stream to solids/gas separation zone, where substantially all of any solids carried in syngas product stream are removed, to result in a substantially solids-free syngas product stream; passing substantially solids-free syngas product stream to downstream processing; transporting carbon-rich particulate product from gasification stage to combustor stage (20); introducing, through second nozzles, an amount of fluidizing gas into second stage to result in second fluidized bed of biomass particulates (230) and fluidizing solids; operating second stage at, greater than or equal to 50 degrees F greater than that of first stage, but not greater than 2000 degrees F and at a residence time of 1-3 times of that of first gasification reactor; returning at least a portion of solids of second stage to first stage; and removing any excess solids from process unit to maintain predetermined balance of solids. The average particle size of the biomass feedstock is 1 micron to 3 inches (preferably 150 microns to 1.5 inches). The biomass feedstock is pretreated by subjecting it to a torrefaction process at 390-665 degrees F to reduce average particle size of biomass feedstock of (1-300, preferably 150-300) mircons. The biomass feedstock is lignocellulose comprised of cellulose and/or hemicelluloses ( greater than or equal to 30, preferably greater than or equal to 50) wt.%. The fluidizing gas is selected from steam, CO2, syngas product, and/or product water (preferably steam). The fluidizing solids are alpha alumina (preferably alpha alumina doped with Ca or K). At least a portion of biomass feedstock is introduced into gasification zone via a riser. The solids residence time of gasification stage is for converting ( greater than or equal to 90, preferably greater than or equal to 95) wt. % of carbon present in biomass.    DESCRIPTION OF DRAWING(S) - The figure shows representation of two stage process unit for converting biomass to predominantly gaseous product with first gasification stage and second combustion stage.    First gasification stage (10)    Second combustion stage (20)    Riser (100)    Fluidized bed of first stage (200)    Nozzle (210)    Fluidized bed of second stage (230)