The invention provides a selective hydrogenation method, which adopts a
fixed bed reactor, wherein the reactor is filled with a hydrogenation catalyst which has a bimodal
pore distribution structure and at least contains Pd, W, Ni and Cu,
pyrolysis gasoline and
hydrogen are mixed and preheated and then enter the reactor, and the
hydrogenation process conditions are that the
reaction temperature is 30-120 DEG C, the reaction pressure is 2-6 MPa, the air speed is 0.5-4 h<-1>, and the volume ratio of
hydrogen to oil is (100-600):1. According to the invention, a catalyst carrier used in the hydrogenation method is
alumina or mainly
alumina and has a bimodal
pore distribution structure,
active components of the catalyst at least contain Pd, W, Ni and Cu, and the hydrogenation method is characterized in that Ni and Cu are loaded in a
microemulsion manner, so that Ni and Cu are mainly distributed in the macropores of the carrier; W is loaded by a solution method, Pd is loaded by a solution method and a
microemulsion method, most of Pd is loaded by the solution method, and a small part of Pd is loaded by the
microemulsion method; and the hydrogenation method has the characteristics of high hydrogenation activity, good selectivity and strong operation stability.