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PREPARATION, MODIFICATION AND CHARACTERIZATION CATALYST Ni/ZSiA ABSTRACT Modification and characterization of the catalyst Ni / ZSiA are prepared from natural zeolite have been carried out. ZSiA catalyst was prepared by washing zeolite with aquadest, followed by dipping in HCl 2M solution, adding Na2SiO3 5% b/b, dipping in NH4Cl 2M, calcination at 500 oC under nitrogen with flow rate of 20 mL/min for 2 hours, oxydation under oxygen flow rate of 20 mL/min and impregnation of Ni metal into catalyst surface using Ni(NO3)2&