Glycerol Catalyst activity Catalysts Steam reforming Catalyst selectivity Catalyst supports Structural characteristics Temperature-programmed reduction Atmospheric pressure Hydrolysis Nickel X ray diffraction Alumina Aluminum Atomic emission spectroscopy CARBON Carbon Carbon deposition Carbon dioxide Catalytic reforming Chemical reactors Copper Fixed bed reactor Hydrogen production Hydrogenolysis Inductively coupled plasma LDH Powder X-ray diffraction (pXRD) Steam reforming of glycerols 1 ,2-propanediol