Process for pretreating biomass by coupling nitrogen-rich catalytic pyrolysis with hydrogen peroxide

The invention belongs to the technical field of high-value utilization of biomass, and particularly relates to a process for pretreating biomass by coupling nitrogen-rich catalytic pyrolysis with hydrogen peroxide. The process comprises the following steps: treating biomass powder by adopting a hydrogen peroxide solution to prepare pretreated biomass powder; preparing a MgB2O4 spinel catalyst, wherein B is Fe, Al, Ga, Cr, La or Y; preparing a ZnO-MgB2O4 modified catalyst; mixing the pretreated biomass raw material with exogenous nitrogen to obtain a nitrogen-rich pyrolysis raw material, and then mixing the nitrogen-rich pyrolysis raw material with a modified catalyst ZnO-MgB2O4 to obtain a catalytic nitrogen-rich pyrolysis raw material; and pyrolyzing the catalytic nitrogen-rich pyrolysis raw material, and collecting a condensable part, namely the bio-oil containing the nitrogen-containing heterocyclic compound. According to the technology for pretreating the biomass by coupling nitrogen-rich catalytic pyroly