Article Bi-functional catalysts Catalyst deactivation Catalyst selectivity Chemical industry Chemical reactors Chemical technologies Deactivated catalysts Fixed bed reactor Hexane High selectivity Hydro-isomerization Hydroisomerization of n hexanes Isomerization Isomers Metals Particle size Physicochemical properties Textural properties Zeolites acidity aqueous solution catalyst comparative study controlled study deactivation energy dispersive X ray spectroscopy hexane isomerization metal location