Method for preparing bio-oil denitrification catalyst from sewage sludge hydrothermal liquefaction residues

The invention discloses a method for preparing a bio-oil denitrification catalyst by utilizing sewage sludge hydrothermal liquefaction residues, which comprises the following steps: taking solid-phase residues obtained by preparing bio-oil by sludge hydrothermal liquefaction as raw materials, extracting metal elements in the solid-phase residues by a physical and chemical method, and constructing a metal nitrate/sulfate homogeneous catalyst of the metal elements. According to the method, the solid-phase residue obtained in the process of preparing the bio-oil through sludge hydrothermal liquefaction is used as a raw material to prepare the homogeneous catalyst, and the catalyst is used for the catalytic denitrification reaction process of the sludge hydrothermal liquefaction bio-oil, so that high-value utilization of the sludge hydrothermal liquefaction solid-phase product is realized; meanwhile, a new thought is provided for all-component comprehensive treatment of the sludge. 本发明公开了一种利用污水污泥水热液化残渣制备生物油脱氮催化剂的