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Boron-modified Ni/Al2O3 catalysts for reduced carbon deposition during dry reforming of methane

Paper ID Volume ID Publish Year Pages File Format Full-Text
39933 45840 2014 10 PDF Available
Title
Boron-modified Ni/Al2O3 catalysts for reduced carbon deposition during dry reforming of methane
Abstract

•Simultaneous deposition of Ni and B precursors on the γ-Al2O3 support.•Boron alters the electronic environment of nickel ions.•Nickel dispersion is improved in the boron-modified catalysts.•Coking resistance can be greatly enhanced in the NiB(x)/γ-Al2O3 catalysts.•The amount of carbon formed during DRM depends on the Ni0 particles size.

In this work, we investigate the effect of boron introduction into Ni/Al2O3 catalyst, in an effort to suppress carbon formation during the CO2 reforming of CH4 (dry reforming – DRM). A series of NiB(x)/Al2O3 catalysts was prepared by wet co-impregnation. All samples contain 10 wt% Ni while the x = B/(Ni + B) atomic ratio vary in the region 0.0–0.7. The physicochemical properties of the fresh, reduced and used samples were studied by BET, XRD, DRS, TEM, SEM-EDS and H2-TPR. The catalytic performance of these catalysts for the CO2 reforming of CH4 was investigated, and the resilient carbon deposited on the used catalysts was determined by temperature programmed hydrogenation. It was found that the modification of Ni/Al2O3 catalyst by boron can, depending on the B loading, reduce the size of Ni particles and greatly reduce the amount of coke formation during DRM without significantly affecting activity and selectivity.

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Keywords
Boron; Ni/Al2O3; Dry reforming of methane; Stability; Coke
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Boron-modified Ni/Al2O3 catalysts for reduced carbon deposition during dry reforming of methane
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 474, 22 March 2014, Pages 125–134
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