TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The inert gas is selected from N2, Ar, CO, CO2, H2 and/or CH4. The inert gas includes at least one non-condensable gas species recycled from step E). The pyrolysis zone and the cooling zone each comprise a gas phase containing oxygen (less than 5, preferably 1 wt.%). The product attribute is carbon content; energy content or structural integrity or mechanical strength. The additive (a1) is selected from sodium hydroxide, potassium hydroxide, magnesium oxide, hydrogen bromide, hydrogen chloride, sodium silicate and/or potassium permanganate. The additive (a2) is selected from magnesium, manganese, aluminum, nickel, chromium, silicon, boron, cerium, molybdenum, phosphorus, tungsten, vanadium, iron chloride, iron bromide, magnesium oxide, dolomite, dolomitic lime, fluorite, fluorospar, bentonite, calcium oxide and/or lime. The second inert gas is selected from N2, Ar, CO, CO2, H2 and/or CH4. In the method (M1), at least some of the second inert gas includes at least one non-condensable gas species recovered from step E).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The method (M1) involves: drying the feedstock to remove at least a portion of moisture contained within the feedstock; deaerating the feedstock to remove at least a portion of interstitial oxygen contained with the feedstock; drying the feedstock to remove at least a portion of moisture contained within the feedstock, and where heat produced from the process gas heating is utilized, at least in part, for the drying. The method further involves: prior to step D), preheating the dried feedstock in a preheating zone in the presence of the inert gas for at least 5 minutes and with a preheating temperature selected from 80-500 (preferably 80-150) degrees C; monitoring and controlling the process with at least one reaction gas probe; process gas heating of at least a portion of the condensable vapors with an oxygen-containing gas; combining at least a portion of the condensable vapors, in at least partially condensed form, with the cooled pyrolyzed solids, to increase the carbon content of the high-carbon biogenic reagent; combining at least a portion of the condensable vapors with the warm pyrolyzed solids, to increase the carbon content of the high-carbon biogenic reagent; introducing at least one additive (a1) selected from acids, bases, or their salts; introducing at least one additive (a2) selected from metal, metal oxide, a metal hydroxide and/or metal halide; introducing at least a portion of the cool pyrolyzed solids to a separate unit for additional pyrolysis, in the presence of a second substantially inert gas for at least 30 minutes and with a pyrolysis temperature selected from 200-600 degrees C, to generate a solid product having higher carbon content than the cool pyrolyzed solids; process gas heating of at least a portion of the condensable vapors with an oxygen-containing gas, where heat produced from the process gas heating is utilized, at least in part, to heat the second inert gas prior to introduction to the separate unit for additional pyrolysis; operating the cooler to cool the warm pyrolyzed solids with steam, thus generating the cool pyrolyzed solids and superheated steam, where the drying is carried out, at least in part, with the superheated steam derived from the cooler; forming a fine powder from the high-carbon biogenic reagent. The pyrolysis temperature is selected from 400-600 degrees C. The pyrolysis in step D) is carried out for at least 20 minutes. The pyrolysis conditions of step D) are selected to maintain the structural integrity or mechanical strength of the high-carbon biogenic reagent relative to the feedstock. The cooling-zone temperature is selected from 150-350 degrees C. Each of the zones is located within a single reactor or separate reactor. The inert gas flows countercurrent relative to the direction of solids flow. The inert gas flows cocurrent relative to the direction of solids flow. In the method (M1), at least two reaction gas probes are utilized to monitor and control the process. The process gas heating is assisted with combustion of natural gas. The heat produced from the process gas heating is utilized, at least in part, to heat the inert gas. In the method (M1), at least a portion of the inert gas is heated and then introduced to the pyrolysis zone. The additive (a1) and (a2) is selected to maintain the structural integrity or mechanical strength of the high-carbon biogenic reagent relative to the feedstock. The presence of the additive (a1) and (a2) in the process increases the carbon content of the high-carbon biogenic reagent compared to an otherwise-identical process without introduction of the additive; increases the energy content of the high-carbon biogenic reagent compared to an otherwise-identical process without introduction of the additive. The additive (a1) and (a2) is introduced prior to or during step B); is introduced prior to or during step D); is introduced during step F), during step G), between steps F) and G), or after step G); is introduced to the warm pyrolyzed solids; is introduced in an aqueous solution, vapor, or aerosol to assist with cooling of the warm pyrolyzed solids in step G); is introduced to the cool pyrolyzed solids to form the high-carbon biogenic reagent containing the additive. The cooler is operated to first cool the warm pyrolyzed solids with steam to reach a first cooler temperature, and then with air to reach a second cooler temperature, where the second cooler temperature is lower than the first cooler temperature and is associated with a reduced combustion risk for the warm pyrolyzed solids in the presence of the air. The method (M1) involves introducing at least one additive to the method prior to step of forming a fine powder from the high-carbon biogenic reagent; introducing at least one additive to the high-carbon biogenic reagent during the forming of fine powder step; introducing at least one additive to the high-carbon biogenic reagent after the forming step. The high-carbon biogenic reagent is formed into a fine powder by particle-size reduction; is formed into a structural object by pressing, binding, pelletizing, or agglomeration; is in the form of structural objects whose structure and/or strength derive from the feedstock; is in the same structural form as the feedstock. Preferred Components: The biomass is dry biomass. The high-carbon biogenic reagent contains the carbon (at least 35, preferably at least 50, more preferably at least 70, most preferably at least 80, especially at least 90, particularly at least 95%) contained in the feedstock. The carbon includes fixed carbon (at least 90, preferably at least 95%) and carbon from volatile matter. The high-carbon biogenic reagent has an energy content of at least 11000 (preferably at least 12000, more preferably 13000, most preferably 14000, especially at least 14500, particularly at least 14700) Btu/lb on a dry basis. EXAMPLE - No suitable example given.