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Chabazite supported NiMo catalysts: Activity and sulfur poisoning

Paper ID Volume ID Publish Year Pages File Format Full-Text
44147 46005 2007 8 PDF Available
Title
Chabazite supported NiMo catalysts: Activity and sulfur poisoning
Abstract

This paper reports recent findings on nanostructured mixed metal clusters of nickel and molybdenum on the surface of chabazite (CHA) which show novel activity and resistance to sulfur poisoning in hydrogenation catalysis. Three systems, Ni-CHA, Mo-CHA, and NiMo-CHA, were prepared by ion-exchange and characterized by instrumental neutron activation analysis (INAA), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), X-ray diffraction (XRD) and NH3 temperature programmed desorption (TPD) in order to give insight into the structure of the supported phases. Ethylene hydrogenation was used as a probe reaction, in both the presence and absence of H2S, as a measure of the activity, selectivity and deactivation characteristics of these systems. The findings of the characterization studies support the observed catalytic properties of bimetallic NiMo-CHA, which shows unique selectivity and resistance to sulfur poisoning relative to the monosmetallic (Ni-CHA and Mo-CHA) systems. These findings indicate a synergistic effect between nickel and molybdenum on chabazite.

Graphical abstractBimetallic clusters of nickel and molybdenum on the surface of chabazite (CHA), show novel activity and resistance to sulfur poisoning in hydrogenation catalysis. Characterization studies of Ni-CHA, Mo-CHA, and NiMo-CHA support the observed catalytic properties of bimetallic NiMo-CHA, indicating a synergistic effect between nickel and molybdenum on chabazite. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Zeolite; Chabazite; Nickel; Molybdenum; Ethylene; Methane; Hydrogenation; Dispersion; Nanocluster
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Chabazite supported NiMo catalysts: Activity and sulfur poisoning
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 327, Issue 2, 15 August 2007, Pages 189–196
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
Any Questions? feel free to contact us