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Comparison of HMF hydrodeoxygenation over different metal catalysts in a continuous flow reactor

Paper ID Volume ID Publish Year Pages File Format Full-Text
39082 45805 2015 8 PDF Available
Title
Comparison of HMF hydrodeoxygenation over different metal catalysts in a continuous flow reactor
Abstract

•We compare the HDO of HMF over six metal catalysts in flow reactor.•The reaction scheme for all the metals is shown to be sequential.•Different products are found from the reaction of DMF on the various metals.•A pseudo-first-order sequential reaction model is applied to obtain rate constants.•Catalyst stability for each metal is also examined.

The three-phase hydrodeoxygenation (HDO) of 5-hydroxymethylfurfural (HMF) and hydrogenation of 2,5-dimethylfuran (DMF) were studied over six carbon-supported metal catalysts (Pt, Pd, Ir, Ru, Ni, and Co) using a tubular flow reactor with 1-propanol solvent, at 180 °C and 33 bar. By varying the space time in the reactor, the reaction of HMF is shown to be sequential, with HMF reacting first to furfuryl ethers and other partially hydrogenated products, which then form 2,5-dimethylfuran (DMF). Ring-opened products and 2,5-dimethyltetrahydrofuran (DMTHF) were produced only from reaction of DMF. Rate constants for the pseudo-first-order sequential reactions were obtained for each of the metals. The selectivities for the reaction of DMF varied with the metal catalyst, with Pd forming primarily DMTHF, Ir forming a mixture of DMTHF and open-ring products, and the other metals forming primarily open-ring products. Catalyst stabilities followed the order Pt ∼ Ir > Pd > Ni > Co > Ru. Since the stability order correlated with carbon balances in the product (>93% for Pt; <75% for Ru), deactivation appears to be caused by deposition of humins on the catalyst.

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Keywords
5-Hydroxymethylfurfural; Hydrodeoxygenation; Dimethyl furan; Continuous flow reactor; Metal catalyst
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Comparison of HMF hydrodeoxygenation over different metal catalysts in a continuous flow reactor
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 508, November 2015, Pages 86–93
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