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Effect of pretreatment conditions on the catalytic performance of Ni–Pt–W supported on amorphous silica–alumina catalysts: Part 1. Catalysts prepared by a sol–gel method

Paper ID Volume ID Publish Year Pages File Format Full-Text
43813 45989 2008 9 PDF Available
Title
Effect of pretreatment conditions on the catalytic performance of Ni–Pt–W supported on amorphous silica–alumina catalysts: Part 1. Catalysts prepared by a sol–gel method
Abstract

In this work, the catalytic behavior of Pt–Ni–WOx supported on amorphous silica–alumina catalysts, prepared by means of a sol–gel technique was tested by hydroisomerization of n-hexane in a continuous fixed-bed reactor operating at atmospheric pressure. Temperature-programmed desorption of ammonia (TPDA), temperature-programmed reduction, BET and atomic absorption spectroscopy techniques were used to characterize the catalysts. The results revealed that both catalytic activity and surface acidity of these solids is strongly dependent on their calcination and reduction temperatures. Besides, the collected data showed that platinum interacts with tungsten and this interaction depends on the pretreatment conditions.

Graphical abstractIn this work, the catalytic behavior of Pt–Ni–WOx supported on amorphous silica–alumina catalysts, prepared by means of a sol–gel technique was tested by hydroisomerization of n-hexane in a continuous fixed-bed reactor operating at atmospheric pressure. Temperature-programmed desorption of ammonia (TPDA), temperature-programmed reduction, BET and atomic absorption spectroscopy techniques were used to characterize the catalysts. The results revealed that both catalytic activity and surface acidity of these solids is strongly dependent on their calcination and reduction temperatures. Besides, the collected data showed that platinum interacts with tungsten and this interaction depends on the pretreatment conditions.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Platinum; Tungsten oxide; Nickel; Isomerization; Reduction; Acidity
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Effect of pretreatment conditions on the catalytic performance of Ni–Pt–W supported on amorphous silica–alumina catalysts: Part 1. Catalysts prepared by a sol–gel method
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 335, Issue 1, 1 February 2008, Pages 103–111
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
You save - $31
Price after discount Only $4.95
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