Hydroisomerization of n-alkane

The mechanisms of n-alkane hydroisomerization on bifunctional catalyst are reviewed including carbonium ion isomerization and cracking, pore and key-lock catalysis, shape selectivity and bimolecular reaction. The effects of the charateristics such as acid intensity and strength, metal dispersion, the ratio of metal and acid cites, pore dimension and size, crystal particle size on the activity, selectivity of the catalyst are systematically discussed. The recent progress of hydroisomerizaion catalyst is described. The methods of improving the activity and selectivity simultaneously are mentioned for respective kinds of catalyst.