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Catalytic ring opening of naphthenic structures: Part II. In-depth characterization of catalysts aimed at upgrading LCO into a high-quality diesel-blending component

Paper ID Volume ID Publish Year Pages File Format Full-Text
44177 46007 2006 16 PDF Available
Title
Catalytic ring opening of naphthenic structures: Part II. In-depth characterization of catalysts aimed at upgrading LCO into a high-quality diesel-blending component
Abstract

The present paper delves into physical and chemical characterization of surface and bulk properties of the twelve 2 wt.% PtxIry catalysts employed in Part I for ring opening of naphthenic structures. The support materials (ceria, alumina, silica, silica-alumina, zirconia, H-SA and magnesia) were investigated using X-ray diffraction (XRD) for phase identification and adsorption/desorption of nitrogen to obtain the specific surface area and pore size distribution. The catalyst preparation via the incipient wetness technique was closely monitored and the final catalysts were examined by means of X-ray fluorescence (XRF), X-ray photoelectron spectroscopy (XPS) and quantitative TPR followed by dynamic pulse chemisorption of CO, Fourier transform infrared spectroscopy (FT-IR) of adsorbed CO and NH3-DRIFTS. The XPS analyses are particularly comprehensive and involve all the catalysts in their fresh, reduced and spent states. The combined results from TPR, XPS and FT-IR of adsorbed CO reveal that metallic Pt-Ir alloys are formed directly upon mild reduction.

Keywords
Catalyst characterization; XPS; TPR; CO chemisorption; FT-IR; Pt-Ir; Platinum; Iridium; Ceria
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Catalytic ring opening of naphthenic structures: Part II. In-depth characterization of catalysts aimed at upgrading LCO into a high-quality diesel-blending component
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 299, 17 January 2006, Pages 14–29
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
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