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Performance of bifunctional СuO–CeO2/γ-Al2O3 catalyst in dimethoxymethane steam reforming to hydrogen-rich gas for fuel cell feeding

Paper ID Volume ID Publish Year Pages File Format Full-Text
45748 46421 2015 9 PDF Available
Title
Performance of bifunctional СuO–CeO2/γ-Al2O3 catalyst in dimethoxymethane steam reforming to hydrogen-rich gas for fuel cell feeding
Abstract

•СuO–CeO2/γ-Al2O3 is an efficient bifunctional catalyst for DMM steam reforming to H2.•γ-Al2O3 acid sites are responsible for DMM hydration to methanol/formaldehyde.•Copper–cerium oxide species are responsible for reforming of DMM hydration products.•СuO–CeO2/γ-Al2O3 is a promising catalyst for multi-fuel processor applications.

Dimetoxymethane steam reforming (DMM SR) to hydrogen-rich gas over a bifunctional СuO–CeO2/γ-Al2O3 catalyst was studied. The performance of γ-Al2O3, CeO2/γ-Al2O3, and СuO/γ-Al2O3 under DMM SR conditions was studied as well to elucidate the role of each catalyst component. BET, TPR, FTIR spectroscopy, XRD, TEM, EDXA and HAADF-STEM techniques were used for catalyst characterization. Complete DMM conversion was observed over the СuO–CeO2/γ-Al2O3 catalyst under atmospheric pressure, T = 300 °C, GHSV = 10,000 h−1 and H2O/DMM = 5 mol/mol with hydrogen productivity of 15.5 L H2/(gcat·h) and CO content in the hydrogen-rich gas below the equilibrium value. DMM SR proceeds via a consecutive two-step reaction mechanism including DMM hydration to methanol and formaldehyde on γ-Al2O3 acid sites and steam reforming of the formed methanol and formaldehyde to hydrogen-rich gas on alumina-supported mixed copper–cerium oxide species. The СuO–CeO2/γ-Al2O3 catalyst proved to be highly promising for multi-fuel processor approach: steam reforming of DMM, dimethyl ether and methanol on the same catalyst under similar reaction conditions to hydrogen-rich gas for fuel cell feeding.

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Keywords
Hydrogen; Dimethoxymethane; Dimethyl ether; Methanol; Copper–ceria–alumina
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Performance of bifunctional СuO–CeO2/γ-Al2O3 catalyst in dimethoxymethane steam reforming to hydrogen-rich gas for fuel cell feeding
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 166–167, May 2015, Pages 535–543
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