Method for reducing CO yield during biomass catalytic pyrolysis

The invention provides a method for reducing CO yield during biomass catalytic pyrolysis, which is used for reducing the yield of CO when biomass is used as fuel to be subjected to catalytic pyrolysis. The method is characterized by comprising the following steps: step S1, performing crushing treatment on biomass raw materials so as to obtain biomass powder; step S2, performing drying treatment onthe biomass powder; step S3, adding a metal powder additive to the biomass powder according to the blending and mixing ratio that the percentage by mass of the metal powder additive is 10%-15% so asto obtain a mixture; step S4, putting the mixture into a reaction container; step S5, charging protective gas into the reaction container so as to replace air in the reaction container; step S6, afterthe protective gas reaches a stable state, raising the temperature of the reaction container to 700-900 DEG C under the atmosphere condition of the protective gas, and continuously performing constant-temperature heating for 3