Title: Bifunctional conversion of n-decane over HPW heteropoly acid incorporated into SBA-15 during synthesis
Authors: Gagea, B ×
Lorgouilloux, Yannick
Altintas, Y
Jacobs, Pierre
Martens, Johan #
Issue Date: Jul-2009
Publisher: Academic Press
Series Title: Journal of Catalysis vol:265 issue:1 pages:99-108
Abstract: SBA-15 ordered mesoporous silica materials containing up to 40 wt.% of HPW heteropoly acid were synthesized via an original method involving the introduction of HPW in an acidified solution of P123 triblock copolymer (EO20PO70O20), the SBA-15 mesostructuring agent (direct synthesis). Samples with similar HPW loadings were also prepared by impregnation of SBA-15. Characterization by XRD, P-31 MAS NMR, NH3-TPD, and N-2 adsorption showed that even after calcination HPW in the direct synthesis samples was better dispersed than that in the impregnated samples. SBA-15-supported HPW materials were converted into bifunctional catalysts. In the conversion of n-decane, direct synthesis samples were superior to impregnated samples. The criteria of ideal bifunctional catalysis were fulfilled, e.g. high yields of skeletal isomers (>70%), of multi-branched skeletal isomers, and of branched cracked products, and hydrocracking reactions limited to primary cracking. Compared to ultrastable Y zeolites, the HPW/SBA-15 samples showed a broader optimum reaction temperature window for isomerization and higher n-decane dibranching selectivity. (C) 2009 Elsevier Inc. All rights reserved.
ISSN: 0021-9517
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Centre for Surface Chemistry and Catalysis
× corresponding author
# (joint) last author

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