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Inkjet printing of porous nanoparticle-based catalyst layers in microchannel reactors

Paper ID Volume ID Publish Year Pages File Format Full-Text
40037 45843 2013 7 PDF Available
Title
Inkjet printing of porous nanoparticle-based catalyst layers in microchannel reactors
Abstract

•Precise deposition of alumina support layers in microchannels with uniform thickness.•Adjustable support layer thickness through repeated inkjet printing.•Homogeneous distribution of Rh nanoparticles within the printed support layers.•Stable performance of Rh/Al2O3 catalyst coating in methane steam reforming for >60 h.

Inkjet printing technology was applied for the precise deposition of alumina nanoparticles in microchannels as a catalyst support layer. Several alumina nanoparticle containing inks were prepared and tested for inkjet printability. It could be shown that additives such as ethylene glycol and polyethylene glycol are needed for aqueous inks up to a concentration of 50 wt.% for continuous drop generation. The printing was conducted both in semicircular and rectangular microchannels. The coating thickness was controlled by repetitive printing of each channel, and the generated layers were uniform in thickness throughout the microchannel foil. The printed alumina layers were impregnated with rhodium nitrate after calcination. A high metal loading of 15 wt.% was applied to enable a high reaction rate per coated area despite the low thickness of the layer, and the catalytic activity was demonstrated for methane steam reforming (MSR). The prepared catalyst layers were highly active, and conversions exceeding 98% were obtained at 973 K and a W/F (catalyst weight/CH4 feed rate) ratio of 19.7 (kgcat s)/molCH419.7 (kgcat s)/molCH4.

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Keywords
Inkjet printing; Catalyst coating; Heterogeneous catalysis; Microchannel reactor; Methane steam reforming
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Inkjet printing of porous nanoparticle-based catalyst layers in microchannel reactors
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 467, 2 October 2013, Pages 69–75
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