||Linear α-olefins are key components for the production of LLDPE or lubricant and the demand for hexene-1 and octene-1 increased enormously in recent years. Alkene metathesis is one of the most attractive process for the production of linear α-olefins. Alkene metathesis reaction is defined as the catalytic exchange of alkylidene groups in alkenes. For instance, two molecules of pentene-1 can react to one molecule of octene and one molecule of ethene. Rhenium based catalysts had attracted much attention because of high activity and tolerance of impurities. It is well known that noble metal catalysts are shown high catalytic performance, but the high market price of noble metals renders their industrial application quite questionable. Therefore, it is more practical from an industrial standpoint to develop an improved nonnovel metal-based catalyst. In this work, octene synthesis by the metathesis of pentene-1 was examined over a series of rhenium based catalysts prepared by coprecipitation method at various pH conditions in a flow type fixed bed reactor to evaluate the catalyst performance.