Friday, July 24, 2015

Effect of acoustic field on CO2 desorption in a fluidized bed of fine activated carbon

Effect of acoustic field on CO2 desorption in a fluidized bed of fine activated carbon

Type
Journal Article
Author
Federica Raganati
Author
Paola Ammendola
URL
Publication
Particuology
Date
March 2015
Abstract
Because of its low energy requirements, adsorption using solid sorbents has the potential to complement or replace current absorption technology. Among commercially available adsorbent materials, attention is focused on activated carbons, because they are easily regenerable by reason of their low heat of adsorption. Such sorbents are available in the form of fine powders. Sound-assisted fluidization can process large amounts of fine powders, promoting and enhancing CO2 capture on fine sorbents, because it maximizes gas–solid contact.
Temperature swing adsorption (TSA), consisting of inducing sorbent regeneration and CO2 recovery by appropriate temperature increase and gas purge, is one of the most promising techniques. Researchers studied the CO2 desorption process by TSA in a sound-assisted fluidized bed of fine activated carbon. They conducted desorption tests under ordinary and sound-assisted fluidization conditions to determine the ability of sound to promote and enhance the desorption efficiency in terms of CO2 recovery, CO2 purity, and desorption time. Results revealed that the application of sound results in higher desorption rates, CO2 recovery and purity.

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