Abstract: A porous Ni/Al₂O₃ catalyst plate was prepared.It gives NH₃ conversion more than 99.5% at 750℃ and space velocity of NH₃ 10000-40000h^-1.An internal heating type was adopted Which saves 30% energy in comparison with the external heating type.The results of reaction kinetics showed that the rate equation of ammonia decomposition on the catalyst plate is γ=kP²NH₃ and the apparent activation energy is 153.0kJ/mol. The partial oxidation of ammonia on the catalyst plate was also investigated at the conditions of 680—750℃,air/NH₃=1.7-1.0 and space velocity 10000-40000h^-1.The results showed that a gas mixture containing 30-43% of H₂ and less 0.1% of O₂ was obtained without external heating after NH₃ combustion.A duration test for 250h indicated that NH₃ conversion was over 99.5%.The reaction kinetics showed that the rate equation of partial oxidation of ammonia was of zero order and the apparent activation energy obtained was 37.2kJ/mol.

Key words: NH₃-Decomposition, of ammonia, NH₃-Partial, Oxidation of ammonia Ni catalyst, Kinetics