Spatially Resolved Operando Measurements in Heterogeneous Catalytic Reactors, Volume 50:Imaging Gas Flow in Gas–Solid Catalytic Systems by Near-Infrared Tomography

Aiouache, Farid (2017) Spatially Resolved Operando Measurements in Heterogeneous Catalytic Reactors, Volume 50:Imaging Gas Flow in Gas–Solid Catalytic Systems by Near-Infrared Tomography. In: Spatially Resolved Operando Measurements in Heterogeneous Catalytic Reactors. Advances in Chemical Engineering . Academic Press, pp. 203-280. ISBN 9780128125892

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Abstract

Near-infrared imaging of 2D and 3D spatial resolutions allowed access to behavior of flowing gases and catalyst activity by measuring spatial distribution of composition and temperature in packed beds of low light scattering, subject to wall effects, and nonisothermal conditions. Water vapor was used as tracing species owing to high absorption coefficient in the near-infrared spectrum. Heterogeneous distribution of activity, flow maldistribution, and dynamic lags between the local mixing zones were observed and quantified. The uneven distribution of concentration and temperature highlighted the importance of mass and heat transport at gas–solid boundaries. The spatial resolution of near-infrared imaging was of importance to give reliable profiles of physical data, and dispersion coefficients and local activity were cited as examples of acceptable validation. The results were a proven stage for further developments, particularly those anticipated with infrared technology. However, key to that would be the development of affordable tunable lasers, optical accessories, and focal planar array sensors of similar sensitivities to those available in the near-infrared spectrum, allowing the technique to be applied to packed beds and other nontransparent reactive media.

Item Type: Contribution in Book/Report/Proceedings
Departments: Faculty of Science and Technology > Engineering
ID Code: 90130
Deposited By: ep_importer_pure
Deposited On: 02 Feb 2018 09:28
Refereed?: No
Published?: Published
Last Modified: 31 Jan 2020 04:51
URI: https://eprints.lancs.ac.uk/id/eprint/90130

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