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Improved Kinetic Data Acquisition Using An Optically Accessible Catalytic Plate Reactor with Spatially-Resolved Measurement Techniques. Case of Study: CO2 Methanation

Department of Chemical Engineering, McGill University, 3610 University Street, Montreal, QC H3A 0C5, Canada
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Catalysts 2018, 8(2), 86; https://doi.org/10.3390/catal8020086
Received: 12 January 2018 / Revised: 15 February 2018 / Accepted: 19 February 2018 / Published: 21 February 2018
(This article belongs to the Special Issue Design Challenges for Catalytic and Photocatalytic Reactors)
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Abstract

Modelling and optimization of chemical reactors require a good understanding of the reactions mechanism with the corresponding kinetic description. Therefore, high quality kinetic data are needed, which can be challenging to obtain, especially for fast and highly exothermic reactions such as the CO2 methanation. Traditionally, kinetic studies rely on measuring the exit gas composition (1 data point per species and experiment) using differential reactors with diluted catalyst beds and reactants to avoid temperature change. Therefore, an optically accessible catalytic channel reactor was designed, which allowed for the chance to gather spatially-resolved information on axial gas composition and catalyst surface temperature, specifically by means of a movable sampling capillary and shortwave infrared-thermography (SWIR), respectively. A catalyst coated plate was placed at the bottom of the channel, while a set of two quartz glass plates covers the top. In the current study 35 data points per gas species were collect for 1 experiment conducted under laminar flow conditions at 425 °C. Catalyst surface temperature determined via a SWIR camera was not influenced by polyatomic molecules partaking in the reaction and thus did not falsify the kinetic data. The catalyst mass distribution along the reactor axis was determined, enabling the development of a correct reactor model for kinetic parameter estimation and model discrimination. View Full-Text
Keywords: spatially-resolved measurement; CO2 methanation; IR-thermography; Ni/Al2O3; kinetic measurements; catalytic plate reactor; catalyst mass distribution spatially-resolved measurement; CO2 methanation; IR-thermography; Ni/Al2O3; kinetic measurements; catalytic plate reactor; catalyst mass distribution
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Hernandez Lalinde, J.A.; Kofler, K.; Huang, X.; Kopyscinski, J. Improved Kinetic Data Acquisition Using An Optically Accessible Catalytic Plate Reactor with Spatially-Resolved Measurement Techniques. Case of Study: CO2 Methanation. Catalysts 2018, 8, 86.

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