CO2 adsorption in a confined fluidized bed of zeolite pellets: Influence of operating velocity--颗粒学报PARTICUOLOGY

Girimonte, R., Formisani, B., & Testa, F. (2019). CO2 adsorption in a confined fluidized bed of zeolite pellets: Influence of operating velocity. Particuology, 46, 67-74. https://doi.org/10.1016/j.partic.2018.08.004

CO₂ adsorption in a confined fluidized bed of zeolite pellets: Influence of operating velocity

Rossella Girimonte ^*, Brunello Formisani, Flaviano Testa

Dipartimento di Ingegneria Informatica, Modellistica, Elettronica e Sistemistica, Università della Calabria, I 87030 Arcavacata di Rende, Cosenza, Italy

10.1016/j.partic.2018.08.004

Volume 46, October 2019, Pages 67-74

Received 15 February 2018, Revised 24 July 2018, Accepted 13 August 2018, Available online 23 January 2019, Version of Record 8 August 2019.

E-mail: rossella.girimonte@unical.it

Highlights

• Adsorption of CO₂ on a confined fluidized bed of pelletized 13X zeolite is studied.

• A comparison is made with the results obtained from a conventional fluidized bed.

• Confined fluidization positively affects the efficiency of the adsorption process.

• The increase of breakthrough time and CO₂ uptake is remarkable.

• The temperature increase associated with CO₂ adsorption is more easily controlled.

Abstract

CO₂ adsorption is performed across a fluidized bed comprising a commercial pelletized 13X zeolite confined to the interstitial void network of a coarse glass sphere packed bed. Compared with traditional fixed bed adsorption, the packed fluidized system allows operation across a wide-range of gas velocities without a substantial increase in pressure drop. Additionally, with respect to conventional fluidization regimes, the technique adopted herein prevents the formation of bubbles in favour of enhancing the bed expansion ability. Furthermore, for a given mass of sorbent, the CO₂ uptake capacity is observed to increase as a result of improved thermal conditions and in eliminating any by-pass effect at the gas–particle interface, which is associated to the suppression of bubbling.

Graphical abstract

Keywords

CO₂ capture; Adsorption; Zeolite 13X; Confined fluidized beds; Packed fluidized bed

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