Study of the conditioning process of Pd/Al2O3 catalysts for CH4 combustion

摘要

Introduction Pd based systems are the catalysts of choice for the abatement of CH4 emissions from natural gas vehicles (NGVs). Factors controlling the CH4 combustion activity are still controversial: time-dependent activation phenomena under reaction conditions were reported, involving Pd surface reconstruction, removal of Cl-contaminants, metal-support interaction [1]. In this work a conditioning process, consisting in CH4-containing alternated redox cycles, was studied over Pd/Al2O3 catalysts with different Pd loading.