Degradation of Non-methane Hydrocarbons in Cooking Fume by Wire Cylinder DC Corona Discharge

IF 2.6 4区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
Siyu Zhang, Xinjun Shen, Zixin Wang, Jing Zhang
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Abstract

In this paper, using a direct current (DC) corona discharge with a bee-slot wire-barrel construction, the degrading efficiency of non-methane hydrocarbons (NMHCs) was examined in terms of cooking temperature, duct gas flow rate, and discharge voltage. The amount of NMHCs produced was investigated under each condition of cooking temperature of 80–120 °C and cooking oils of soybean oil, peanut oil, canola oil and lard. When soybean oil was used as the cooking fume at a cooking temperature of 200 °C, the largest concentration of NMHCs was formed. In the degradation experiment, it was found that the corona discharge treatment effect was very good, which was proportional to the discharge voltage and inversely proportional to the cooking temperature and gas flow rate, and the treatment effect was the best when the discharge voltage was 34 kV, the cooking temperature was 120 ℃ and the gas flow rate was 25 m/s, the degradation rate reached 91.40%, and the degradation could meet the national emission standards. Meanwhile, the degradation mechanism of phenanthrene, anthracene and pyrene, which are more toxic and have larger concentration in the cooking fume, was analyzed. Furthermore, response surface optimization experiments were also conducted, and the best combination of the optimized factors was 34 kV input voltage, 127.7 °C cooking temperature, and 0.011 s treatment time.

Abstract Image

利用线筒直流电晕放电降解烹饪油烟中的非甲烷碳氢化合物
本文使用蜂槽式线筒结构的直流(DC)电晕放电,从蒸煮温度、管道气体流速和放电电压三个方面考察了非甲烷碳氢化合物(NMHC)的降解效率。在烹饪温度为 80-120 °C,烹饪油为大豆油、花生油、菜籽油和猪油的条件下,研究了非甲烷总烃的产生量。当烹饪温度为 200 °C 时使用大豆油作为烹饪油烟时,产生的 NMHC 浓度最高。在降解实验中发现,电晕放电处理效果非常好,与放电电压成正比,与蒸煮温度和气体流速成反比,当放电电压为 34 kV、蒸煮温度为 120 ℃、气体流速为 25 m/s 时,处理效果最好,降解率达到 91.40%,降解后可达到国家排放标准。同时,分析了蒸煮油烟中毒性较大、浓度较高的菲类、蒽类和芘类的降解机理。此外,还进行了响应面优化实验,优化因子的最佳组合为 34 kV 输入电压、127.7 ℃ 蒸煮温度和 0.011 s 处理时间。
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来源期刊
CiteScore
5.40
自引率
0.00%
发文量
104
审稿时长
1.7 months
期刊介绍: International Journal of Environmental Research is a multidisciplinary journal concerned with all aspects of environment. In pursuit of these, environmentalist disciplines are invited to contribute their knowledge and experience. International Journal of Environmental Research publishes original research papers, research notes and reviews across the broad field of environment. These include but are not limited to environmental science, environmental engineering, environmental management and planning and environmental design, urban and regional landscape design and natural disaster management. Thus high quality research papers or reviews dealing with any aspect of environment are welcomed. Papers may be theoretical, interpretative or experimental.
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