Hydrogenation of 1-octene was carried out in a monolithic stirred reactor. A cordierite monolith with HZSM-5 washcoat, impregnated with Pd was used as catalyst. The reactions were conducted between 50-65 degrees C and 250-400 psi hydrogen pressure. The effects of temperature and pressure on conversion and selectivity were measured. Major part of 1-ocetene was converted to n-octane and sortie isomers of octene were formed. However, at higher operating condition they were converted to n-octane. The experiments proved that the monolithic reactor is an attractive alternative reactor.