Pore Structure Analysis to Adsorb NOx Gas based on Porous Materials

Lim, Taekyung; La, Yunju; Jeon, Ok Sung; Park, Soo‐Jin; Yoo, Young Joon; Yang, Keun–Hyeok

doi:10.3938/jkps.77.790

Cited by 4 publications

(3 citation statements)

References 18 publications

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“…The predominant odor adsorption materials include activated carbon (El‐Merraoui et al., 2000) and zeolite (Bickel & Gounder, 2022) with micropores (below 2 nm), as well as bentonite (Zhong et al., 2022) and diatomite (Zhou et al., 2022) with mesopores (2–50 nm). These porous materials exhibit large specific surface areas (Lim et al., 2020; Sonwane & Bhatia, 2000) and, owing to their porous structure, can efficiently remove sulfur compounds and carbon dioxide via van der Waals adsorption (Abdulrasheed et al., 2018; Chung et al., 2021; Jeong & Yoo, 2020). However, porous media has disadvantages such as short breakthrough time, low adsorption capacity, and poor selectivity (Abdulrasheed et al., 2018).…”

Section: Introductionmentioning

confidence: 99%

Preparation of food active packaging materials based on calcium hydroxide and modified porous medium for reducing carbon dioxide and kimchi odor

Jeong,

Lee,

Lee

et al. 2023

Journal of Food Science

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Carbon dioxide and kimchi odor compounds, formed during fermentation, negatively affect the long‐distance distribution of commercial kimchi. To address these issues, in this study, we modified different porous media (activated carbon, bleaching earth, diatomite, and zeolite) using sodium bicarbonate and silver (Ag) ions. Functional sheets were prepared using linear low‐density polyethylene, calcium hydroxide, a porous medium, and a blowing agent. Various prepared porous media and sheets were effective in removing acetic acid, sulfur compounds (allyl methyl sulfide, dimethyl disulfide, allyl methyl disulfide, and diallyl disulfide), and carbon dioxide. Porous media with micropores exhibited a sulfur compound removal efficiency of 43.5%–99.4%, while no effect was observed on acetic acid removal. However, porous media with mesopores showed an acetic acid removal efficiency of 42.3%–90.7%, with no reduction in sulfur compounds removal. The impregnation of porous materials with sodium bicarbonate significantly (p < 0.05) enhanced the acetic acid removal activity. Ag modification improved the sulfur compound removal of the mesoporous bleaching earth and diatomite statistically (p < 0.05). Additionally, the incorporation of sodium bicarbonate‐impregnated mesoporous media significantly improved carbon dioxide removal, reducing concentrations from 25.97% to 14.27% with respect to the control group. Our functional food packaging materials can solve the current issues in kimchi distribution by removing carbon dioxide and kimchi odor without affecting its quality.Practical ApplicationFood active packaging materials containing calcium hydroxide and modified porous medium are effective in removing carbon dioxide and kimchi odor (acetic acid and sulfur compounds). The removal of carbon dioxide and kimchi odor, which adversely affect the distribution and sale of commercial kimchi, can help solve the current issues with kimchi distribution without affecting its quality.

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Section: Introductionmentioning

confidence: 99%

Preparation of food active packaging materials based on calcium hydroxide and modified porous medium for reducing carbon dioxide and kimchi odor

Jeong,

Lee,

Lee

et al. 2023

Journal of Food Science

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“…It is efficient for NO removal and potentially utilized for high-temperature processes. The performance of catalysts is prone to contaminants in feedstock; v) other methods such as biological treatment [9,10], adsorption on the surface of porous materials [11][12][13], and combustion modification are also considered.…”

Section: Introductionmentioning

confidence: 99%

NO Dissociation on Platinum and Platinum-Rhodium Alloy: A Theoretical Investigation

Vu,

Phung,

Thong

et al. 2023

Bull. Chem. React. Eng. Catal.

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In this computational study, the preferential adsorption and co-adsorption sites of various chemical species (N, O, and NO) on the Pt (111) and Rh3Pt (111) surfaces were identified. The preferential adsorption site for NO and co-adsorption sites for N and O on the Pt (111) surface are the hollow (fcc) sites; and these on the Rh3Pt (111) surface are the hollow (fcc1) site and hollow N(hcp2)-O(fcc1) sites, respectively. The activation energies of the NO dissociation reaction on the Pt (111) and Rh3Pt (111) catalytic surfaces are 2.35 and 2.02 eV, respectively. The lower activation energy of the NO decomposition on the Rh3Pt (111) surface is explained by the stronger back-donation from the 4d orbital of the Rh atoms to the 2 anti-bonding orbital of the NO molecule. The activation energies of the N and O recombination reaction on the Pt (111) and Rh3Pt (111) catalytic surfaces are 1.51 and 2.30 eV, respectively. The study indicates that the Rh3Pt (111) surface not only facilitates the NO decomposition but also better prevents N and O from recombination. Copyright © 2024 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

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“…Therefore, some studies have aimed to improve the adsorption efficiency by adding acids or heavy metals [14,16,17]. For example, studies of zeolite, which can effectively remove SO x and nitrogen oxides, have reported a significant difference in adsorption efficiency depending on the durability, pore structure, size, and shape of the zeolite [18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Efficient adsorption of sulfide gas using porous zeolite powder

Lee

Jeon

et al. 2021

J. Korean Phys. Soc.

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We prepared zeolite 13× beads and 10% zeolite 13× bead-embedded water-permeable blocks using porous zeolite powder. The difference in the surface state and pore structure of the zeolite powder and bead was analyzed through scanning electron microscopy and Brunauer-Emmett-Teller measurements. The process for making zeolite beads partially damaged their surface. Furthermore, the pore structure of the zeolite beads changed from micropores to a mixture of micro-and mesopores. The sulfur oxide (SO x ) adsorption efficiency of zeolite powder, beads, and blocks was evaluated. The initial SO x adsorption efficiency of zeolite beads decreased after washing ten times, but the increase in SO x concentration after initial adsorption was very small. The SO x adsorption efficiency of the block was very high even after washing ten times. These results indicate that the block is promising for applications requiring the adsorption of harmful gases such as SO x and NO x .

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Pore Structure Analysis to Adsorb NOx Gas based on Porous Materials

Cited by 4 publications

References 18 publications

Preparation of food active packaging materials based on calcium hydroxide and modified porous medium for reducing carbon dioxide and kimchi odor

Preparation of food active packaging materials based on calcium hydroxide and modified porous medium for reducing carbon dioxide and kimchi odor

NO Dissociation on Platinum and Platinum-Rhodium Alloy: A Theoretical Investigation

Efficient adsorption of sulfide gas using porous zeolite powder

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