Method for preparing cellulose and lignin oil by depolymerizing lignocellulose without exogenous hydrogen

A method for preparing cellulose and lignin oil by depolymerizing lignocellulose without exogenous hydrogen, comprising:

• reacting the lignocellulose dispersed into water at 120° C. to 180° C. under the action of a catalyst;
• wherein the weight ratio of the lignocellulose to the catalyst is 1:(0.01-0.2);
• and
• separating a reaction product to obtain the cellulose and the lignin oil,
• wherein the catalyst comprises a carrier and an active ingredient supported on the carrier;
• wherein in the catalyst, the mass fraction of the active ingredient in the total amount of the catalyst is 0.5% to 5%;
• wherein, through the synergistic effect of the active ingredient metal in the catalyst and the carrier, the hemicellulose undergoes highly selective aqueous-phase reforming to provide the hydrogen source;
• wherein the active ingredient in the catalyst is platinum;
• and the carrier comprises at least one of a nickel aluminum composite material, a magnesium aluminum composite material, a zinc aluminum composite material, a cobalt aluminum composite material, and an iron aluminum composite material.