Abstract: The lanthanum modified NiO/Al₂O₃ catalyst was prepared by equal volume impregnation method using aluminum hydroxide dry glue as the raw material. The effects of the introduction sequence of La₂O₃ and the amount of La₂O₃ loading on the selective hydrodeolefin performance of NiO/Al₂O₃ catalyst were investigated in a 10 mL fixed bed microreactor using the reformate with the bromine index of 3 836 mgBr/(100g)as feedstock. The results show that under the conditions of a reaction pressure of 1.0 MPa,a volumetric space velocity of 8 h^-1, and a hydrogen-to-oil volume ratio of 25, the catalyst with 1.0% La₂O₃ loading, prepared by the lanthanum first and nickel later, has good selectivity for olefin hydrogenation, the loss of aromatics is less than 1.0%, and the bromine index is less than 200 mgBr/(100 g).

Key words: reformate, NiO/Al₂O₃ catalyst, La modification, selective hydrogenation