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Selective ring opening of decalin with Pt–Ir on Zr modified MCM-41

Paper ID Volume ID Publish Year Pages File Format Full-Text
43721 45985 2007 10 PDF Available
Title
Selective ring opening of decalin with Pt–Ir on Zr modified MCM-41
Abstract

Selective ring opening of decalin over the catalysts comprising of Ir in combination with Pt supported on mesoporous material, Zr–MCM-41 was studied in a trickle bed reactor. The Zr substituted MCM-41 (Si/Zr = 5) support was synthesized by hydrothermal method and characterized by BET surface area measurement, XRD, FTIR, TPD of ammonia. XRD showed hexagonal nature of MCM-41. TPD of ammonia and DRIFTS of ammonia adsorption spectra, respectively, showed moderate acidity and presence of Lewis and Brønsted acid sites. Zr–MCM-41 catalysts loaded with Ir and Pt in the range of 0–1.5 wt.% were prepared and characterized by DRIFT spectroscopy of CO adsorption, DRIFT of NH3 and TEM. The activity and selectivity of Ir/Pt-loaded Zr–MCM-41 were investigated in the ring opening of decalin in the temperature range of 300–400 °C at 5 MPa in the presence of hydrogen. Increase in Ir loading significantly increased the ring opening products yield and selectivity. Maximum conversion of 55 wt.% obtained at 400 °C. In the range of operating conditions studied, the optimum loading for better ring opening yield of 15 wt.% was 1.5 wt.% Ir and 0.75 wt.% Pt.

Graphical abstractSelective ring opening of decalin over Ir–Pt catalysts supported on mesoporous Zr–MCM-41 was studied in a trickle bed reactor. Increase in Ir loading significantly increased the ring opening products yield and selectivity. The optimum loading for better ring opening yield was 1.5 wt.% Ir and 0.75 wt.% Pt on Zr–MCM-41. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Zr–MCM-41; Ring opening; DRIFT; Platinum; Iridium; Decalin
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Selective ring opening of decalin with Pt–Ir on Zr modified MCM-41
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 321, Issue 1, 29 March 2007, Pages 17–26
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
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Price after discount Only $4.95
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