Optimization of a hydrodynamic cavitation reactor using salicylic acid dosimetry

Lekhraj P. Amin, Parag R. Gogate, Arthur E. Burgess, David H. Bremner

Research output: Contribution to journalArticle

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Abstract

In the present work, optimization of a hydrodynamic cavitation reactor, for maximizing the extent of hydroxyl radical generation, has been investigated using salicylic acid as a dosimeter. The effect of differing operating parameters such as inlet pressure into the reactor, shape of the orifice, and concentration of salicylic acid employed was investigated where the extent of hydroxyl radical generation was quantified in terms of concentration of the hydroxylated products 2,5- and 2,3- dihydroxybenzoic acid. With an upstream pressure of <100 psi no hydroxyl radicals were produced but excellent results were obtained with a small circular nozzle at 4000 psi and a salicylate concentration of 750 ppm. The use of a combination of ultrasound along with hydrodynamic cavitation is also reported for the first time and results in a 15% improvement in the hydroxyl radical generation when the distance between the orifice and transducer is 5 mm to 10 mm.
Original languageEnglish
Pages (from-to)165-169
Number of pages5
JournalChemical Engineering Journal
Volume156
Issue number1
DOIs
Publication statusPublished - Oct 2009

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Salicylic acid
salicylic acid
Salicylic Acid
cavitation
hydroxyl radical
Orifices
Cavitation
Hydroxyl Radical
Dosimetry
Hydrodynamics
hydrodynamics
Dosimeters
Transducers
Nozzles
Ultrasonics
salicylate
Acids
Salicylates
transducer
reactor

Cite this

Amin, Lekhraj P. ; Gogate, Parag R. ; Burgess, Arthur E. ; Bremner, David H. / Optimization of a hydrodynamic cavitation reactor using salicylic acid dosimetry. In: Chemical Engineering Journal. 2009 ; Vol. 156, No. 1. pp. 165-169.
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Optimization of a hydrodynamic cavitation reactor using salicylic acid dosimetry. / Amin, Lekhraj P.; Gogate, Parag R.; Burgess, Arthur E.; Bremner, David H.

In: Chemical Engineering Journal, Vol. 156, No. 1, 10.2009, p. 165-169.

Research output: Contribution to journalArticle

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AU - Amin, Lekhraj P.

AU - Gogate, Parag R.

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AB - In the present work, optimization of a hydrodynamic cavitation reactor, for maximizing the extent of hydroxyl radical generation, has been investigated using salicylic acid as a dosimeter. The effect of differing operating parameters such as inlet pressure into the reactor, shape of the orifice, and concentration of salicylic acid employed was investigated where the extent of hydroxyl radical generation was quantified in terms of concentration of the hydroxylated products 2,5- and 2,3- dihydroxybenzoic acid. With an upstream pressure of <100 psi no hydroxyl radicals were produced but excellent results were obtained with a small circular nozzle at 4000 psi and a salicylate concentration of 750 ppm. The use of a combination of ultrasound along with hydrodynamic cavitation is also reported for the first time and results in a 15% improvement in the hydroxyl radical generation when the distance between the orifice and transducer is 5 mm to 10 mm.

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