A new reactor for process intensification involving the simultaneous application of adjustable ultrasound and microwave radiation.

Autor: Călinescu I; Faculty of Applied Chemistry and Material Science, University 'Politehnica' of Bucharest, 1-7, Gh. Polizu, Bucharest 011061, Romania., Vinatoru M; Faculty of Applied Chemistry and Material Science, University 'Politehnica' of Bucharest, 1-7, Gh. Polizu, Bucharest 011061, Romania. Electronic address: mircea.vinatoru@upb.ro., Ghimpețeanu D; Faculty of Applied Chemistry and Material Science, University 'Politehnica' of Bucharest, 1-7, Gh. Polizu, Bucharest 011061, Romania., Lavric V; Faculty of Applied Chemistry and Material Science, University 'Politehnica' of Bucharest, 1-7, Gh. Polizu, Bucharest 011061, Romania., Mason TJ; Faculty of Health and Life Sciences, Coventry University, United Kingdom.
Jazyk: angličtina
Zdroj: Ultrasonics sonochemistry [Ultrason Sonochem] 2021 Sep; Vol. 77, pp. 105701. Date of Electronic Publication: 2021 Aug 03.
DOI: 10.1016/j.ultsonch.2021.105701
Abstrakt: Ultrasound (US) and Microwaves (MW) are effective methods for processes intensification. Their combined use in the same reactor can lead to remarkable results. Recently there has been a resurgence of interest in this field for new synthetic applications using reactors based upon existing technologies. We describe here a new type of apparatus in which the thermal energy is continuously removed from the system making possible the use of high power and adjustable ultrasonic and microwave densities throughout the process. The installation consists of a glass reactor located in a monomode applicator which is immersed at the same time in an ultrasonic device which can be operated at different frequencies and powers. A liquid, transparent to microwaves, was used to couple ultrasonic energy to the reactor and to remove the heat generated. Comsol software was used to get information about the distribution of ultrasonic and microwave energy between the reactor liquid and the coupling fluid. The performance was assessed using the conversion of p-nitrophenol into 4-nitrocatechol as a chemical dosimeter and a transesterification.
(Copyright © 2021. Published by Elsevier B.V.)
Databáze: MEDLINE
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