INVESTIGADORES
BENITEZ viviana Monica
artículos
Título:
Pt-Pd/WO3-ZrO2 catalysts for isomerization-cracking of long paraffins
Autor/es:
M. BUSTO; V.M. BENITEZ; C.V. VERA; J.M. GRAU; J.C.YORI
Revista:
APPLIED CATALYSIS A-GENERAL
Editorial:
Elsevier
Referencias:
Lugar: Amsterdan; Año: 2008 vol. 347 p. 117 - 125
ISSN:
0926-860X
Resumen:
The objective of this work was to optimize the acid function and metallic function of a Pt-Pd/WO3-ZrO23-ZrO2
catalyst for isomerization-cracking of long paraffins. The calcination temperature and theWcontent were
the preparation variables varied and studied. The catalysts were tested in the reaction of n-decane
isomerization-cracking. The focus of the optimization was put on the synthesis of a catalyst with a good
isomerizing activity and a minimum activity for the formation of light gases. In this way an isomerizate of
high octane number and high liquid yield would be obtained and used for blending into the gasoline pool.
Thecatalystswere further characterized bytemperature programmed desorption of probemolecules (TPD).
Varying both the W content and the calcination temperature enabled the regulation of the acid
function properties. Thus both the activity and selectivity could be fine-tuned. The highest activity was
obtained with the samples with a 15% of Wand calcined at 700 8C. The samples calcined at 700 8C were
also themost stable ones, i.e. the activity of the acid function was less affected by coking. All the prepared
catalysts produced a high octane number gain that was between 75 and 95 points and low yields of light
gases (<10%). Deactivation by carbonaceous deposits was attributed to coking on Lewis acid sites.
also themost stable ones, i.e. the activity of the acid function was less affected by coking. All the prepared
catalysts produced a high octane number gain that was between 75 and 95 points and low yields of light
gases (<10%). Deactivation by carbonaceous deposits was attributed to coking on Lewis acid sites.
isomerization-cracking. The focus of the optimization was put on the synthesis of a catalyst with a good
isomerizing activity and a minimum activity for the formation of light gases. In this way an isomerizate of
high octane number and high liquid yield would be obtained and used for blending into the gasoline pool.
Thecatalystswere further characterized bytemperature programmed desorption of probemolecules (TPD).
Varying both the W content and the calcination temperature enabled the regulation of the acid
function properties. Thus both the activity and selectivity could be fine-tuned. The highest activity was
obtained with the samples with a 15% of Wand calcined at 700 8C. The samples calcined at 700 8C were
also themost stable ones, i.e. the activity of the acid function was less affected by coking. All the prepared
catalysts produced a high octane number gain that was between 75 and 95 points and low yields of light
gases (<10%). Deactivation by carbonaceous deposits was attributed to coking on Lewis acid sites.
also themost stable ones, i.e. the activity of the acid function was less affected by coking. All the prepared
catalysts produced a high octane number gain that was between 75 and 95 points and low yields of light
gases (<10%). Deactivation by carbonaceous deposits was attributed to coking on Lewis acid sites.
n-decane
isomerization-cracking. The focus of the optimization was put on the synthesis of a catalyst with a good
isomerizing activity and a minimum activity for the formation of light gases. In this way an isomerizate of
high octane number and high liquid yield would be obtained and used for blending into the gasoline pool.
Thecatalystswere further characterized bytemperature programmed desorption of probemolecules (TPD).
Varying both the W content and the calcination temperature enabled the regulation of the acid
function properties. Thus both the activity and selectivity could be fine-tuned. The highest activity was
obtained with the samples with a 15% of Wand calcined at 700 8C. The samples calcined at 700 8C were
also themost stable ones, i.e. the activity of the acid function was less affected by coking. All the prepared
catalysts produced a high octane number gain that was between 75 and 95 points and low yields of light
gases (<10%). Deactivation by carbonaceous deposits was attributed to coking on Lewis acid sites.
also themost stable ones, i.e. the activity of the acid function was less affected by coking. All the prepared
catalysts produced a high octane number gain that was between 75 and 95 points and low yields of light
gases (<10%). Deactivation by carbonaceous deposits was attributed to coking on Lewis acid sites.
8C. The samples calcined at 700 8C were
also themost stable ones, i.e. the activity of the acid function was less affected by coking. All the prepared
catalysts produced a high octane number gain that was between 75 and 95 points and low yields of light
gases (<10%). Deactivation by carbonaceous deposits was attributed to coking on Lewis acid sites.<10%). Deactivation by carbonaceous deposits was attributed to coking on Lewis acid sites.