Abstract
This chapter focuses on the shape selective catalysts, especially on ZSM-5 type zeolites, for the isomerization of m-xylene. The chapter discusses a novel catalyst that is selective for pxylene in the isomerization of m-xylene, to investigate the reaction mechanism and kinetics over the most selective catalyst using by a fixed bed catalytic reactor. In this work, gas-phase isomerization reaction of m-xylene was studied over various catalysts including Ni, Sn, Pt, Ga, Re or Zr in different amounts. Alumina and several types of zeolites have been employed as carriers. The catalysts prepared were characterized and the most selective catalyst was determined after a selectivity-screening test. The most selective catalysts were found to be the ones prepared over ZSM5 carriers and consisting of Ga and/or Pt as active components.
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