TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Method: In the method (A), the step of producing hydrogen gas comprises: producing hydrogen gas from at least partially hydrolyzed hemicellulose; producing the hydrogen gas in the presence of a low temperature reforming catalyst; producing the hydrogen gas in the presence of the low temperature reforming catalyst supported on a support material; producing the hydrogen gas in the presence of the low temperature reforming catalyst having a modifier element in combination with the Ce and/or the transition metal, where the modifier element is present at 0.25-5% by weight of the low temperature reforming catalyst; and producing hydrogen gas at 150-300 degrees C and at pressures of 2068427-6894757 pascal (300-1000 psig) in a hydrogen generator reactor. In the method (A), the step of pyrolyzing the carbonaceous biomass feedstock comprises: pyrolyzing the carbonaceous biomass feedstock in the presence of a pyrolysis upgrading catalyst; pyrolyzing the carbonaceous biomass feedstock in the presence of the hydroprocessing catalyst supported on a support material; pyrolyzing the carbonaceous biomass feedstock in the presence of a zeolitic catalyst; pyrolyzing the carbonaceous biomass feedstock in the presence of the basic catalyst; pyrolyzing in the presence of a transition metal-based catalyst (II) supported on a support material; pyrolyzing the carbonaceous biomass feedstock in the presence of the ore catalyst. In the method (A), the step of deoxygenating a residual portion of the oxygenated hydrocarbons with additional hydrogen gas comprises deoxygenating with additional hydrogen gas produced by steam reforming at least a portion of light oxygenated hydrocarbons in the pyrolysis gases in the presence of the low temperature reforming catalyst. In the method (B), the step of extracting hemicellulose from the carbonaceous biomass feedstock comprises at least partially hydrolyzing the hemicellulose extract. The method (B) further comprises at least partially hydrolyzing the hemicellulose extract after the extracting step and prior to the treating step. In the method (B), the step of treating the hemicellulose extract in the presence of a low temperature reforming catalyst to produce hydrogen gas comprises treating the hemicellulose extract at 150-300 degrees C and at pressures of 2068427-6894757 pascal (300-1000 psig) in a hydrogen generator reactor. In the method (B), the step of treating the hemicellulose extract comprises treating the hemicellulose extract in the presence of the low temperature reforming catalyst optionally supported on a support material, optionally having a modifier element (0.25-5% by weight of the low temperature reforming catalyst) in combination with the Cerium and/or the transition metal. In the method (B), the step of introducing the hemicellulose-depleted carbonaceous biomass feedstock into the pyrolysis reactor comprises introducing the hemicellulose-depleted carbonaceous biomass feedstock into the pyrolysis reactor in the presence of a pyrolysis upgrading catalyst comprising a hydroprocessing catalyst supported on a support material, a zeolitic catalyst, a basic catalyst, a transition metal-based catalyst (II), and/or an ore catalyst. Preferred Components: The low temperature reforming catalyst comprises a Cerium (Ce)-based catalyst, and/or transition metal-based catalyst (I), where the Ce and the transition metal comprises 1-20 wt.% of the low temperature reforming catalyst. The transition metal of the transition metal-based (I) catalyst comprises chromium (Cr), molybdenum (Mo), tungsten (W), vanadium (V), niobium (Nb), tantalum (Ta), scandium (Sc), yttrium (Y), and/or lanthanum (La). The support material comprises a metal oxide comprising alumina, silica-alumina, silica, zirconia, and titania, silica carbide, and/or carbon. The modifier element comprises at least one of alkali or alkaline earth metals comprising lithium (Li), sodium (Na), potassium (K), cesium (Cs), magnesium (Mg), calcium (Ca), strontium (Sr), and/or barium (Ba). The pyrolysis upgrading catalyst comprises hydroprocessing catalyst, a zeolitic catalyst, a basic catalyst, a transition metal-based catalyst (II), and/or an ore catalyst. The hydroprocessing catalyst comprises Ni/Mo, Co/Mo, Ni/W, and/or Co/W. The zeolitic catalyst has a structure type of FAU, MFI, and/or BEA. The zeolitic catalyst has a modifier element comprising nickel (Ni), palladium (Pd), platinum (Pt), rhodium (Rh), ruthenium (Ru), Iridium (Ir), gallium (Ga), and/or zinc (Zn). The basic catalyst comprises magnesium oxide (MgO), calcium oxide (CaO), Cs-Zeolite X, and/or hydrotalcite. The transition metal of the transition metal-based catalyst (II) is Ni, Pd, Pt, Rh, Ru, and/or Ir. The ore catalyst comprises aluminum ore, a borate ore, and/or a silicate ore. The ore catalyst contains a metal oxide of formula (M-O), and the ratio of metal oxide to the ore catalyst is 1-10 by weight. The ratio of the pyrolysis upgrading catalyst to the hemicellulose-depleted carbonaceous biomass feedstock is 0.1-10, by weight.M = Fe, Ni, Co. EXAMPLE - No suitable example given.