Formation and Catalytic Properties of Nickel Metal Particles Supported on Zeolite

Abstract

Publisher Summary This chapter discusses the formation and catalytic properties of nickel metal particles supported on zeolite. Dispersed nickel supported on various oxides was used as a catalyst, especially in the hydrogenation, dehydrogenation, hydrogenolysis reactions. It has multiple effects: on the formation of metal particles, where it is available to stabilize the nickel in a dispersed state and inhibit its sintering, and on the catalytic reaction, where it is available to provide acidic sites and to play a role in dual functional catalysis. Zeolites contain cavities or tubes with defined size within which metal particles can be entrapped and their strong acidic sites are available for dual functional catalysis. Taking in account the interaction between metal and support, zeolites could be able to provide a synergetic effect for some reactions catalyzed by metals. There are two main problems that influence the formation of small particles of supported nickel: the first is the poor reducibility of nickel cation; the second is the mobility of nickel particles with heating and their ability to form large cristallites.