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CoZr/H-ZSM-5 hybrid catalysts for synthesis of gasoline-range isoparaffins from syngas

Paper ID Volume ID Publish Year Pages File Format Full-Text
41196 45880 2011 9 PDF Available
Title
CoZr/H-ZSM-5 hybrid catalysts for synthesis of gasoline-range isoparaffins from syngas
Abstract

Different CoZr/H-ZSM-5 hybrid catalysts were prepared by a hydrothermal synthesis method, where H-ZSM-5 was enwrapped onto the Co-ZrO2 Fischer–Tropsch synthesis (FTS) catalyst. The catalysts were characterized by BET, XRD, 27Al NMR, SEM, TEM, XPS, H2-TPR, NH3-TPD and IR techniques. The catalytic performance for the direct conversion of syngas to high-octane gasoline-range (C5–11) hydrocarbons was studied. Coke formation on the spent catalysts was measured by TGA. Compared with the base Co-ZrO2 catalyst or the physically mixed catalyst of Co-ZrO2 with H-ZSM-5, the reducibility of the hybrid catalyst was much lower due to the strong interactions of cobalt phase with zeolite and/or zirconia. The catalytic performance results showed that the as-prepared hybrid catalysts had high selectivity towards gasoline-range isoparaffins and relatively low methane selectivity in spite of the relatively low catalytic activity. The hybrid catalysts could effectively minimize the accumulation of carbonaceous deposits. The catalyst with aluminum isopropoxide as Al source exhibited excellent selectivity on the isoparaffin synthesis and relatively good stability.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (168 K)Download as PowerPoint slideHighlights► Bifunctional CoZr/zeolite catalysts were prepared for Fischer–Tropsch synthesis. ► Hybrid catalysts had high selectivity towards gasoline and their isoparaffins. ► A relatively low methane selectivity was obtained. ► The catalyst performed superior stability during the long-term run.

Keywords
ZSM-5; Cobalt; Hybrid catalyst; Isoparaffin; Fischer–Tropsch synthesis
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CoZr/H-ZSM-5 hybrid catalysts for synthesis of gasoline-range isoparaffins from syngas
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 408, Issues 1–2, 28 November 2011, Pages 38–46
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