Research on the kinetics and degradation pathways of gaseous acetic acid ester organics

ABSTRACT

Designed to meet the specific needs of the printing industry exhaust gas emissions, this paper proposes a method for the degradation of gaseous acetic acid ester organics that is environmentally friendly, safe, and simple to use: micro-nano cavitation technology. In the process of using micro-nano cavitation technology to degrade acetic acid ester organics, the products in the degradation process were analyzed by gas chromatography-mass (GC-MS) spectrometry, and the degradation pathways of acetic acid ester organics were identified. Under high temperatures and high pressure caused by cavitation collapse, the C–C bond and C–O bond on the main chain of organic matter are cleaved to form low molecular products. Low-molecular intermediate products are continuously produced as the reaction advances, and these intermediate products are further oxidized and decomposed into carbon dioxide and water. Besides, the factors that influence the degradation rate of acetic acid ester organics were investigated. Based on the experimental data, acetic acid esters can degrade with the greatest efficiency when their initial concentration is 200 ± 50 mg/m³ and their treatment time is 20∼30 min. Moreover, the experiment was optimized using the response surface method. The results suggested that for an initial concentration of 155.544 mg/m³ and a reaction time of 21.961 min, the best degradation rate was 0.251 min⁻¹. Micro-nano cavitation technology is a novel and promising technology for the degradation of volatile organic compounds, with a wide range of practical applications.

GRAPHICAL ABSTRACT

KEYWORDS:

• Micro-nano bubbles
• cavitation
• acetic acid ester
• degradation
• GC-MS

Acknowledgments

All authors contributed to the study's conception and design. Yulan Wang and Jianjun Wei provided ideas for the experiment. The elementary experiments were operated by Yulan Wang and Juan Hu.

Zhongming Guo provided maintenance and material support for the experiment. Jianjun Wei reviewed and edited the manuscript. Yulan Wang wrote the original manuscript.

Data availability statement

All data generated or analyzed during this study are included in this article.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The authors declare that no funds, grants, or other support were received during the preparation of this manuscript.