稀土La改性NiO/Al2O3重整生成油加氢催化剂的研究

以氢氧化铝干胶为原料，采用等体积浸渍法制备La改性NiO/Al₂O₃催化剂，以溴指数为3 836 mgBr/（100 g）的重整生成油为原料，在10 mL固定床微反装置上考察了La₂O₃引入顺序以及La₂O₃负载量对NiO/Al2O3催化剂选择性加氢脱烯烃性能的影响。结果表明：在反应压力1.0 MPa、体积空速8 h^-1、氢油体积比25的条件下，先La后Ni方式制备的La₂O₃负载量为1.0%的催化剂具有良好的烯烃加氢选择性，芳烃损失小于1.0%，溴指数低于200 mgBr/（100 g）。

STUDY ON La MODIFIED Ni-BASED CATALYSTS FOR SELECTIVE HYDROGENATION OF REFORMATE TO REMOVE TRACE OLEFINS

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).