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Asymmetric ceramic hollow fibres applied in heterogeneous catalytic gas phase reactions

Paper ID Volume ID Publish Year Pages File Format Full-Text
55057 47039 2012 11 PDF Available
Title
Asymmetric ceramic hollow fibres applied in heterogeneous catalytic gas phase reactions
Abstract

The present work provides a summary of the state of the art of using asymmetric ceramic hollow fibres as substrates for inorganic dense membranes and/or catalysts, in the development of new hollow fibre reactors for heterogeneous catalytic gas phase reactions. Three different hollow fibre reactor designs were studied; a hollow fibre membrane reactor (HFMR), a catalytic hollow fibre micro-reactor (CHFMR) and a catalytic hollow fibre membrane micro-reactor (CHFMMR). The performance of the HFMR, CHFMR and CHFMMR in different reactions such as methanol steam reforming (MSR), dry reforming of methane (DRM) and water gas shift (WGS) was compared with that of a traditional fixed-bed reactor configuration. A Pd-based membrane (thickness of approximately 5 μm) was deposited on the outer surface of the asymmetric ceramic hollow fibres using an electroless plating technique, in the development of both the HFMR and CHFMMR. The Pd-based membranes showed high H2 permeability (10.7≤PH2≤14.1 L m−2 s−1 atm−1/210.7≤PH2≤14.1 L m−2 s−1 atm−1/2 at T = 450 °C and ΔP = 1 bar) and infinite H2 selectivity under the different reaction conditions studied. The catalyst was deposited on the walls of finger-like region of the asymmetric ceramic hollow fibres by the sol–gel Pechini method, in the development of the CHFMR and CHFMMR. The CHFMMR, which showed a performance 2.5 times higher than that in a traditional fixed-bed reactor, is proposed as a key step in the intensification of heterogeneous catalytic gas phase processes by integration of membrane-reactor and micro-reactor technologies.

Graphical abstractAsymmetric hollow fibres with bimodal pore size distributions are employed in the development of novel hollow fibre based membrane micro-reactors.Figure optionsDownload full-size imageDownload high-quality image (118 K)Download as PowerPoint slideHighlights► New hollow fibre reactors for heterogeneous catalytic gas phase reactions are proposed. ► Three different hollow fibre reactor designs were studied. ► A key step in the intensification is by integration of membrane and micro-reactor technologies.

Keywords
Membranes; Asymmetric hollow fibres; Micro-reactors; Membrane reactors
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 193, Issue 1, 15 October 2012, Pages 20–30
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