Method for producing hydrogen from woody waste through staged pyrolysis and catalytic gasification

A method for producing hydrogen from woody waste through staged pyrolysis and catalytic gasification, comprising:

• performing baking pretreatment on the woody waste at a baking temperature of 200-300° C. for baking time of 20-60 min;
• thermally activating aluminum smelting waste residues, mixing the aluminum smelting waste residues with 5% organic acid by volume, placing a mixture in a high-pressure reaction kettle, adding deionized water for a reaction, performing cooling, then, performing dehydrating and calcining at a calcining temperature of 500-600° C. for calcining time of 1-2 h, and mixing the thermally activated aluminum smelting waste residues with the baked woody waste, wherein a mass volume ratio of the aluminum smelting waste residues to the organic acid is 1 g:1 mL, the organic acid comprises one or more of acetic acid and benzoic acid, the deionized water is added for the reaction, a mass ratio of the water to the aluminum smelting waste residues is 2-4:1, a temperature for the reaction is 200-300° C., and reaction time is 30-45 min;
• pyrolyzing and gasifying the mixture for hydrogen production, and performing a pyrolysis reaction on the mixture at a temperature of 500-700° C. for 15-60 min to obtain primary pyrolysis gas and a carbon-aluminum composite material, wherein the pyrolysis reaction is performed under a CO2/H2O atmosphere, a total flow rate of the introduced CO2/H2O atmosphere is 0.1-0.2 L/min, and a volume ratio of CO2/H2O is 1-4:1;
• and
• further catalytically cracking the obtained primary pyrolysis gas by taking the obtained carbon-aluminum composite material as a catalyst.