Removal of Ethylene and By-products Using Dielectric Barrier Discharge with Ag Nanoparticle-Loaded Zeolite for Keeping Freshness of Fruits and Vegetables

Abstract

Some of fresh produces emit ethylene gas, one of plant hormones, which promotes the aging for themselves and accelerates senescence of other agricultural produce. In transportation of some kinds of agricultural produce, reducing ethylene gas in the transportation container is important for keeping freshness of fruits and vegetables. In this study, ethylene gas was decomposed using a dielectric barrier discharge (DBD) plasma reactor. The ethylene gas was diluted with the gas mixture of nitrogen, oxygen and carbon dioxide as simulated gas in the transportation container. The DBD plasma was generated by a pulse switching power supply consisted of MOS-FET switching devices, capacitors and pulse transformers. The mixture gas was contained harmful by-products, ozone and carbon monoxide after DBD plasma treatment. An Ag nanoparticle-loaded zeolite was set in the catalytic reactor to remove the by-products. The catalytic reactions reduced the by-products produced by the plasma treatment. It was confirmed that carbon monoxide diluted with simulated dry air was oxidized to carbon dioxide by the catalyst and DBD plasma.

Enhancing adhesion and polymerization of lipase‐plasma‐polymerized‐ethylene coatings deposited with planar dielectric‐barrier‐discharge‐type aerosol‐assisted atmospheric‐pressure plasma system

“…The voltage of the capacitor was measured using a high‐voltage probe (SI‐9002, Sapphire Instruments Co., Ltd, Taiwan). From the Q‐V Lissajous figure (Figure b), the mean plasma energy per cycle is calculated based on the figure's area . The estimated plasma power densities differ with different operating conditions as summarized in (Table ).…”

Disinfection and Sterilization Using Plasma Technology: Fundamentals and Future Perspectives for Biological Applications

“…Recently, the use of plasma technology has been reported to enhance seed germination and the growth of plants [87]. In addition, the removal of volatile organic compounds, such as ethylene gas, by plasma treatment may be useful during the transportation of agricultural products in containers [88]. Therefore, the application of plasma technology could also contribute to higher crop yields as well as the preservation of foods.…”

Influence of oxygen concentration on ethylene removal using dielectric barrier discharge

“…here, M is the third collision partner that takes part in energy absorption, but does not react chemically, and T is the gas temperature. The atmospheric pressure is assumed to be 1 atm, and the density of M is approximately 2.6 × 10 14,21,22) The production of is O related to O 3 production, as shown in R1 and R2. As shown in Fig.…”

“…Figure 1 shows the schematics of the DBD reactor. 14) The coaxial configuration is employed for the DBD reactor, which consists of a stainless-steel tube and a glass tube wrapped with aluminum tape. The stainless-steel tube has a 16 mm outer diameter and is used as a high-voltage electrode.…”

“…[8][9][10] It has also been reported that nonthermal plasma can decompose C 2 H 4 into CO 2 and H 2 O through oxidization with a high reaction rate and high energy efficiency. [11][12][13][14] The O produced by nonthermal plasma mainly contributes to C 2 H 4 removal. 13) Although O 3 produced by reactions between O and oxygen (O 2 ) also contributes to C 2 H 4 removal and fruit and vegetable preservation, O 3 is not only harmful to the human body, but also causes injury to fruits and vegetables.…”