Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/62072
Share/Impact:
Title: Mass transfer enhancement in supercritical fluids extraction by means of power ultrasound
Authors: Riera, Enrique, Golás Sánchez, Yolanda, Blanco Blanco, Alfonso, Gallego Juárez, Juan Antonio, Blasco, M., Mulet, A.
Keywords: Power ultrasound
Supercritical fluids
Separation and extraction processes
Issue Date: 2004
Publisher: Elsevier
Abstract: The use of high-intensity ultrasound represents an efficient manner of producing small scale agitation, enhancing mass transfer on supercritical fluids (SF) extraction processes. In this way, a supercritical CO2 extraction of oil from particulate almonds using power ultrasound was studied. To examine the effect of the acoustic waves all experiments were performed with and without ultrasound. A power ultrasonic transducer for a working frequency of about 20 kHz was constructed and installed inside a highpressure 5 l SF extractor. The experimental tests were carried out with CO2 at 280 bar and 55 C. Grounded almonds with an oil content of about 55%, in an amount of 1500 g were deposited inside the SF reactor where the solvent was introduced at a flow rate of 20 kg/h. The results show that the kinetics and the extraction yield of the oil were enhanced by 30% and 20% respectively, when a power of about 50 W was applied to the transducer. The average time of each extraction process was of about 8 h and 30 min. In addition, the transducer was also used as a sensitive probe capable to detect the phase behavior of supercritical fluids when it was driven with low power signals.
Description: 4 páginas, 6 figuras
Publisher version (URL): http://dx.doi.org/10.1016/j.ultsonch.2004.01.019
URI: http://hdl.handle.net/10261/62072
ISSN: 1350-4177
???metadata.dc.identifier.doi???: 10.1016/j.ultsonch.2004.01.019
Citation: Ultrasonics Sonochemistry 11 : 241-244 (2004)
Appears in Collections:(CAEND) Artículos

Files in This Item:
There are no files associated with this item.
Show full item record
 
CSIC SFX LinksSFX Query


Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.