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Modelling and optimization of IR cell devoted to in situ and operando characterization of catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
54939 47032 2013 7 PDF Available
Title
Modelling and optimization of IR cell devoted to in situ and operando characterization of catalysts
Abstract

CFD modelling and tracer experiments were performed in order to improve the design of sample holder used for transmission IR experiments in flow conditions.The complexity of gas velocity field evidenced for the usual circular geometry is avoided with an alternative geometry. A new geometry involving a square pellet, multiple inlets and outlets and specific sample holder proposed in the present study leads to a more homogeneous gas velocity in the vicinity of the catalyst surface as shown by modelling with COMSOL. Experimental measurements of local tracer concentrations in different places of the reactor during transient experiments confirmed more homogeneous tracer distribution in the reactor mainly due to multiple inlets and outlets. Consequences of the presence of dead volumes identified by modelling were also examined and discussed.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (93 K)Download as PowerPoint slideHighlights► Optimization of reactor design for IR experiments in transmission mode. ► Modelling of gas velocity fields in the vicinity of the catalyst surface. ► Experimental measurements of tracer concentration.

Keywords
Operando; Infrared spectroscopy; Reactor modelling; Residence time distribution; COMSOL
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Modelling and optimization of IR cell devoted to in situ and operando characterization of catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 205, 30 April 2013, Pages 134–140
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
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