Single and Composite Bifunctional Catalysts of H-MOR or SO42+-ZrO2 for n-Octane Hydroisomerization-Cracking. Influence of the Porosity of the Acid Component

J.M. GRAU; J.M. PARERA

APPLIED CATALYSIS A-GENERAL

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 1997 vol. 162 p. 17 - 27

0926-860X

The performances of two materials with different acidic and textural properties, H-Mordenite and SO2--ZrO2, are compared in the hydroisomerization-cracking of n-octane at 573 K and 1.5 MPa, aiming at the production of light isomers. To obtain a bifunctional catalyst, a metallic function (Pt or Pd) is added either to the acid material or in a composite catalyst prepared by mixing the acid materials with either metal/SiO2 or metal/A12O3. The synergy of functions produces catalysts more selective to isomers. Since the deactivation by pore blockage decreases, the composite catalysts with H-Mordenite present an improved stability. The composite catalysts with SO42- - ZrO2 do not present this improvement because of their wide pore size distribution.