SCIENCE AND TECHNOLOGY OF CEREALS, OILS AND FOODS

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Study on the Effect of Sulfuryl Fluoride on Ozone Elimination and Technology for Tail Gas Treatment(Online First, Recommended Article)
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    Abstract:

    It is of vital importance to evaluate the environmental risks brought by sulfuryl fluoride before applying it wildly as an alternative to aluminum phosphide in grain storage. Degradation kinetics of 350 mg/m3 ozone was investigated under sulfuryl fluoride concentrations of 5, 10 and 20 g/m3. The results show that ozone degradation was significantly accelerated by sulfuryl fluoride in air. The half-life of ozone concentration in the sulfuryl fluoride-free environment is 275.2 min, while the half-lives of ozone in the 5, 10, and 20 g/m3 sulfuryl fluoride concentration are 157.4, 166.4 and 161.8 min, respectively. In this study, we compared the sulfuryl fluoride elimination of active carbon, neutral aluminum oxide, calcium hydroxide suspension and sodium hydroxide solutions to eliminate sulfuryl fluoride, and sodium hydroxide solution was employed finally. The study found that temperature is a key factor in the process of sulfuryl fluoride elimination. The half-lives of sulfuryl fluoride were 592.5, 404.2, and 323.5 min at 20, 25, and 30 ℃, while the sodium hydroxide solution was 0.25 mol/L.

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  • Received:
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  • Online: July 29,2021
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