CeO_2-ZrO_2-La_2O_3/Al_2O_3 catalyst was prepared by precipitation method.Catalytic performance was appraised under CO_2 atmosphere.Lifetime,deactivation and regeneration of the catalyst were also studied.The optimized reaction conditions is as following: reaction temperature of 600 ℃,CO_2 to ethylbenzene ratio of 10 ∶ 1,contact time of 163 h · g( cat)/mol( EB).Conversion of the ethylbenzene decreased from 47.4% to 24%,after 100 h on stream.Characterization and regeneration of the deactivated catalysts indi...