Optimization of a hydrodynamic cavitation reactor using salicylic acid dosimetry

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

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    66 Citations (Scopus)
    229 Downloads (Pure)

    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

    Keywords

    • Hydrodynamic cavitation
    • Salicylic acid dosimetry
    • Hydroxyl radicals
    • Ultrasonic cavitation
    • Optimization

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