NOVELTY - Producing (P1) a high-carbon biogenic reagent, involves: (a) providing carbon-containing feedstock comprising biomass; (b) optionally drying feedstock to remove moisture contained within feedstock; (c) optionally de-aerating dried feedstock to remove interstitial oxygen; (d) pyrolyzing feedstock in presence of inert gas; (e) separating condensable vapors and non-condensable gases from hot pyrolyzed solids; (f) cooling hot solids; (g) optionally cooling warm pyrolyzed solids; (h) passing condensable vapors or non-condensable gases across warm/cool solids; and (i) recovering the reagent.    USE - For producing a high-carbon biogenic reagent such as carbon (claimed); and for converting biomass into high-carbon biogenic reagents that are suitable for a variety of commercial applications. The high-carbon biogenic reagents are used: as injectable (e.g. pulverized) carbon-based materials; as an injectable carbon replacement product for basic oxygen furnace or electric arc furnace facilities; as a pulverized carbon replacement product; as electrode used in aluminum production; in carbon electrodes including in batteries, fuel cells, capacitors, and other energy-storage or energy-delivery devices; and as catalyst supports in a wide range of catalyzed chemical reactions.    ADVANTAGE - The process improve process energy efficiency; and improve a product attribute associated with the high-carbon biogenic reagent, such as carbon content, energy content, structural integrity, or mechanical strength. The high-carbon biogenic reagents are not only environmentally superior, but also functionally superior from a processing standpoint because of greater purity. The production of biogenic reagents result in significantly lower emissions of CO, CO2, NOx, SO2, and hazardous air pollutants compared to the coking of coal-based products necessary to prepare them for use in metals production. The use of high-carbon biogenic reagents in place of coal or coke also significantly reduces environmental emissions of SO2, hazardous air pollutants, and mercury. Also, because of the purity of these high-carbon biogenic reagents (including low ash content), the biogenic reagents have the potential to reduce slag and increase production capacity in batch metal-making processes.    DETAILED DESCRIPTION - Producing (P1) a high-carbon biogenic reagent, involves: (a) providing a carbon-containing feedstock comprising biomass; (b) optionally drying the feedstock to remove at least a portion of moisture contained within the feedstock; (c) optionally de-aerating the dried feedstock to remove at least a portion of interstitial oxygen, if any, contained with the feedstock; (d) in a pyrolysis zone, pyrolyzing the feedstock in the presence of inert gas for at least 10 minutes and with a pyrolysis temperature selected from 250-700 degrees C, to generate hot pyrolyzed solids, condensable vapors, and non-condensable gases; (e) separating at least a portion of the condensable vapors and at least a portion of the non-condensable gases from the hot pyrolyzed solids; (f) in a cooling zone, cooling the hot pyrolyzed solids, in the presence of the inert gas for at least 5 minutes and with a cooling temperature less than the pyrolysis temperature, to generate warm pyrolyzed solids; (g) optionally cooling the warm pyrolyzed solids in a cooler to generate cool pyrolyzed solids; (h) subsequently passing at least a portion of the condensable vapors and/or at least a portion of the non-condensable gases from step (e) across the warm pyrolyzed solids and/or the cool pyrolyzed solids, to form enhanced pyrolyzed solids with increased carbon content; and (i) recovering a high-carbon biogenic reagent comprising at least a portion of the enhanced pyrolyzed solids. INDEPENDENT CLAIMS are included for the following:    (1) producing (P2) a high-carbon biogenic reagent, involving: (a) providing a solid stream comprising a carbon-containing material; (b) providing a gas stream comprising condensable carbon-containing vapors, non-condensable carbon-containing gases, or a mixture of condensable carbon-containing vapors and non-condensable carbon-containing gases; and (c) passing the gas stream across the solid stream under suitable conditions to form a carbon-containing product with increased carbon and/or energy content relative to the carbon-containing material; and    (2) a high-carbon biogenic reagent production system, comprising: (a) a material feed system configured to introduce a carbon-containing feedstock; (b) an optional dryer, disposed in operable communication with the material feed system, configured to remove moisture contained within a carbon-containing feedstock; (c) a multiple-zone reactor, disposed in operable communication with the material feed system or the dryer, where the multiple-zone reactor contains at least one pyrolysis zone disposed in operable communication with a spatially separated cooling zone, and where the multiple-zone reactor is configured with an outlet to remove condensable vapors and non-condensable gases from solids; (d) an optional cooler, disposed in operable communication with the multiple-zone reactor; (e) a material enrichment unit, disposed in operable communication with the multiple-zone reactor or the solids cooler, configured to pass the condensable vapors and/or the non-condensable gases across the solids, to form enhanced solids with increased carbon content; and (f) a carbon recovery unit, disposed in operable communication with the material enrichment unit.