Investigation of Hydroxyl Radical Yield in an Impact-Jet Hydraulic Cavitator

Yan Cao; Dongdong Xie; Yongchun Huang; Chengdu Huang; Kunming Zhang; Xiangyu Zhang; Shujun Wang

LAPSE:2023.0712

Published Article

LAPSE:2023.0712

Investigation of Hydroxyl Radical Yield in an Impact-Jet Hydraulic Cavitator

Yan Cao, Dongdong Xie, Yongchun Huang, Chengdu Huang, Kunming Zhang, Xiangyu Zhang, Shujun Wang

February 20, 2023

Abstract
Hydroxyl radical (·OH) is a key component that leads to the cleavage of the glycosidic bond in the process of chitosan (CS) degradation by hydrodynamic cavitation (HC). In this paper, methylene blue (MB) was selected as the trapping agent of ·OH and the yield of ·OH in an impact-jet hydraulic cavitator was investigated. The results showed that the cavitation intensity and the number of passes (N) were the two main factors affecting the yield of ·OH. A smaller cavitation number (Cv) or a larger N indicated that more ·OH can be produced. Based on the dimensionless number correlation method, the yield of ·OH was correlated with Cv, N, Euler number (Eu), Reynolds number (Re), and a dimensionless parameter (γ), and a prediction model of ·OH yield was established. The relative deviations between the experimental and calculated values of the ·OH yield were basically within 10% by the prediction model. On the basis of the prediction model, the yield of ·OH produced in the process of CS degradation by HC was obtained. The results showed that the predicted yield of ·OH was significantly correlated with the intrinsic viscosity reduction rate of CS. It was suggested that the prediction model of ·OH yield based on the MB solution can be used to calculate the ·OH yield during the degradation of low concentration CS by HC.

Record ID

LAPSE:2023.0712

Keywords

chitosan, degradation, hydrodynamic cavitation, hydroxyl radical yield, prediction model

Subject

Materials

Suggested Citation

Cao Y, Xie D, Huang Y, Huang C, Zhang K, Zhang X, Wang S. Investigation of Hydroxyl Radical Yield in an Impact-Jet Hydraulic Cavitator. (2023). LAPSE:2023.0712

Author Affiliations

Cao Y: Department of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China; Guangxi Key Laboratory of Green Processing of Sugar Resources, Guangxi University of Science and Technology, Liuzhou 545006, China
Xie D: Department of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China
Huang Y: Department of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China; Guangxi Key Laboratory of Green Processing of Sugar Resources, Guangxi University of Science and Technology, Liuzhou 545006, China
Huang C: Department of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China; Guangxi Key Laboratory of Green Processing of Sugar Resources, Guangxi University of Science and Technology, Liuzhou 545006, China
Zhang K: Department of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China; Guangxi Key Laboratory of Green Processing of Sugar Resources, Guangxi University of Science and Technology, Liuzhou 545006, China
Zhang X: Department of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China
Wang S: National Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China

Journal Name

Processes

Volume

10

Issue

11

First Page

2194

Year

2022

Publication Date

2022-10-26