Kinetics of the ozone gas reaction in popcorn kernels

Silva, Marcus V.; Faroni, L. R. D.; Sousa, Adalberto Hipólito de; Prates, Lucas Henrique Figueiredo; Abreu, Artur Oliveira

doi:10.1016/j.jspr.2019.06.014

Cited by 23 publications

(39 citation statements)

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“…This result is in agreement with other authors who evaluated kinetic models in studies of ozone decomposition in porous Regarding the decomposition of ozone in the porous medium, the first-order model was the one that best fit the data of residual concentration as a function of time (Table 3 and Figure 1B). This result is in agreement with other authors who evaluated kinetic models in studies of ozone decomposition in porous media composed of grains (Alencar et al, 2011;Pandiselvam et al, 2015;Silva et al, 2019). Considering the first-order kinetic model, the half-life of ozone in the porous medium composed of quinoa was 6.08 min at 25 °C.…”

Section: Ozone Saturation Process and Decomposition Kineticssupporting

confidence: 92%

“…The sigmoidal equation proposed in the present study adequately adjusted to the residual ozone concentration data as a function of the ozonation period for quinoa seeds, with a determination coefficient (R 2 ) of 0.96. This type of equation has been used by others, who obtained satisfactory results for peanuts (Alencar et al, 2011), common corn and sweet corn (J. V. S. Souza et al, 2018), popcorn (Silva et al, 2019), and Brazil nuts (Oliveira et al, 2020).…”

Section: Ozone Saturation Process and Decomposition Kineticsmentioning

confidence: 99%

“…V. S. Souza et al, 2018), popcorn (Silva et al, 2019), and Brazil nuts (Oliveira et al, 2020). In the present study, a saturation time of 12.0 min was obtained for a saturation concentration of 522.5 ppm.…”

Section: Ozone Saturation Process and Decomposition Kineticsmentioning

confidence: 99%

“…M. O. Souza, Alencar, Ribeiro, & Ferreira, 2019;Oliveira et al, 2020). It also has proven effective in controlling insects on stored grains (Sousa, Faroni, & Guedes, 2017;Silva, Faroni, Sousa, Prates, & Abreu, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…In contact with organic matter, such as grains and seeds, the decomposition process is accelerated, which makes it essential to conduct studies to verify the behavior of the gas in contact with different materials. Data are available in the literature regarding the saturation and decomposition of ozone in a porous medium containing different grains, such as of corn (Zea mays L.) (J. V. S. Souza, Alencar, Junqueira, & Oliveira, 2018;Silva et al, 2019), peanuts (Arachis hypogaea L.) (Alencar, Faroni, Martins, Costa, & Cecon, 2011), and rice (Oryza sativa L.) (Pandiselvam, Venkatachalam, & Rajamani, 2015;Santos, Faroni, Cecon, Ferreira, & Pereira, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Ozonation of quinoa seeds (Chenopodium quinoa Willd.): saturation and decomposition kinetics of ozone and physiological quality of seeds

Alencar

Jojoa

Silva

et al. 2021

Semina: Ciênc. Agrár.

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Ozonation has been evaluated as an alternative method for seed treatment. In this context, the goal of this study was to evaluate the saturation process and kinetics of decomposition of ozone in a porous medium composed of quinoa BRS Syetetuba and possible changes in seed quality. Ozone concentration and saturation time in the porous medium and half-life were determined by adopting an inlet ozone concentration of 885 ppm and a flow rate of 5.0 L min-1 at 25 °C. The ozonation periods adopted were 0, 30, 60, 90, and 120 min. Regarding the physiological quality of the seeds, the germination percentage, germination speed index, electrical conductivity, and length of the shoot, root, and normal seedlings were analyzed. At the inlet ozone concentration of 885 ppm and a flow rate of 5.0 L min-1, the saturation concentration and saturation time in the porous medium composed of quinoa were 522.5 ppm and 12.0 min, respectively. The half-life of ozone in the porous medium was 6.08 min at 25 °C. Under these conditions, ozonation did not affect the physiological quality of quinoa BRS Syetetuba seeds for up to 120 min.

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Section: Ozone Saturation Process and Decomposition Kineticssupporting

confidence: 92%

Section: Ozone Saturation Process and Decomposition Kineticsmentioning

confidence: 99%

Section: Ozone Saturation Process and Decomposition Kineticsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ozonation of quinoa seeds (Chenopodium quinoa Willd.): saturation and decomposition kinetics of ozone and physiological quality of seeds

Alencar

Jojoa

Silva

et al. 2021

Semina: Ciênc. Agrár.

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Low‐pressure ozone injection system: relationship between reaction kinetics and physical properties of grains

et al. 2022

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BACKGROUND The ozonation of grains in a closed system at low pressure is a strategy with the potential for treating packaged products. Research is necessary to characterize the reaction kinetics of ozone in this type of injection system so that it is possible to design chambers and determine the ozone concentrations suitable for commercial‐scale applications. The objective of this study was therefore to characterize the low‐pressure ozone injection system in relation to the physical properties of the grains and determine possible changes in their quality. Samples (5 kg each) of common beans, cowpea beans, corn, popcorn kernels, paddy rice, and polished rice were exposed to ozone in a 70 L hypobaric chamber. Initially, the internal pressure of the chamber was reduced to 500 hPa. Then, ozone was injected at a concentration of 32.10 g m−3 at a volumetric flow rate of 1 L min−1 until reaching a pressure of 1000 hPa. To relate the decomposition of ozone to the grains that were being evaluated, different physical properties were determined, and quality analysis was conducted. RESULTS Ozone gas half‐life outside and inside the package depended on the grain type. Ozone decomposition was quickest in polished rice and slowest in common beans. The half‐life of the different grains ranged from 17.8 to 52.9 and 16.4 to 52.9 min, outside and inside the package, respectively. Considering the physical properties, specific surface (Ss), surface area (SA), and sphericity (φ) exhibited a significant correlation with the decomposition rate constant (k) of ozone. However, the variables volume (V), permeability (K), porosity (ε), and specific mass (ρ) showed no correlation with k. CONCLUSION The physical properties of grain influenced the reaction kinetics of ozone gas during the low‐pressure injection process. Ozone gas injection at low pressures did not alter the quality attributes of the grains under study. © 2022 Society of Chemical Industry.

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