Ultrasound field distribution and ultrasonic oxidation desulfurization efficiency

Ultrasonics Sonochemistry, Volume 20, Issue 2, March 2013, Pages 696–702
Ultrasound field distribution and ultrasonic oxidation desulfurization efficiency
Liyan Liu, Jingjing Wen, Yang Yang, Wei Tan
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
Abstract
Ultrasonic oxidation desulfurization (UODS) shows promise as a method for deep desulfurization technology since it can be carried out under mild conditions.
A number of investigations have been conducted on ways to optimize the reaction conditions, including ultrasonic irradiation time, oxidizing reagent amounts, and types of organic acid. Much less work has been reported on the influence of the ultrasonic cavitation field distribution.
Researchers measured the relative intensity of the cavitation events with the aluminum foil erosion method in a commonly used ultrasonic cleaning vessel in both horizontal and vertical directions. They scanned the aluminum foil erosion image w into computer. MATLAB software was used to pretreat the erosion image and determine the positions of the erosion points so that the ratio of the erosion area to the entire area could be calculated. Because the erosion ratios was the representation of the cavitation intensity, this helped to quantify the measurement result. The desulfurization efficiency was then measured in different position of the vessel. The results match well with the cavitation field distribution results.  This suggests that the cavitation field distribution can be used to guide the UODS process.
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