12-tungstophosphoric acid supported on dealuminated USY as a catalyst for hydroisomerization of n-heptane | Health & Environmental Research Online (HERO)

Health & Environmental Research Online (HERO)

Print Feedback Export to File

This record has one attached file:

Citation
Tags

HERO ID

4883076

Reference Type

Journal Article

Title

12-tungstophosphoric acid supported on dealuminated USY as a catalyst for hydroisomerization of n-heptane

Author(s)

Wang, J; Lin, Z; Han, SY; Eum, M; Lee, CW

Year

2003

Is Peer Reviewed?

Yes

Journal

Journal of Industrial and Engineering Chemistry
ISSN: 1226-086X

Volume

Issue

Page Numbers

281-286

Web of Science Id

WOS:000183220200010

Abstract

The dealuminated USY supported 12-tungstophosphoric acid was prepared and characterized by XRD, IR, NH3-TPD and nitrogen adsorption techniques. The Pt-bearing dealuminated USY supported 12-tungstophosphoric acid catalyst was measured in the hydroisomerization of n-heptane in an atmospheric fixed-bed microreactor. Comparative investigation was also carried out over USY or silica gel supported catalysts. The dealuminated USY supported 12-tungstophosphoric acid catalyst was found to exhibit the high catalytic activity in this reaction with a conversion of n-heptane at 29.8% and a selectivity for isomerization products at 94.1%, which is much higher than that of the 12-tungstophosphoric acid-free catalyst. The promotion effect of 12-tungstophosphoric acid was not observed over USY or silica gel supported catalysts. Both catalytic conversion and selectivity have been discussed in relation with the physical chemical property of catalysts.

Keywords

12-tungstophosphoric acid; USY; hydroisomerization of n-heptane; heteropoly acid; linear alkane