Adsorption equilibria and kinetics of ethane and ethylene on zeolite 13X pellets

Chung, Kyounghee; Park, Dooyong; Kyung-min, Kim，; Lee, Chang Ha

doi:10.1016/j.micromeso.2022.112199

Cited by 13 publications

(5 citation statements)

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“…The cation–π interaction and the interaction between ethylene CH groups and zeolite framework O elements drive the process, exhibiting bond energies comparable to hydrogen bonding [ 52 ]. Therefore, the Langmuir isotherm equation is not suitable for the process and needs some additional parameters as follows:

where q m is the saturated adsorption capacity; subscripts p and c represent physical and chemical adsorption; b is the Langmuir constant, which represents the strength of adsorption; e is the base of natural logarithms; s is a parameter related to the distribution of chemisorption energy, which reflects the uneven degree of the adsorption center on the adsorbent surface [ 53 ].…”

Section: Resultsmentioning

confidence: 99%

“…where q m is the saturated adsorption capacity; subscripts p and c represent physical and chemical adsorption; b is the Langmuir constant, which represents the strength of adsorption; e is the base of natural logarithms; s is a parameter related to the distribution of chemisorption energy, which reflects the uneven degree of the adsorption center on the adsorbent surface [53].…”

Section: Ethylene Adsorption Performance Of Ag/nz5(x)mentioning

confidence: 99%

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Enhanced Adsorption of Trace Ethylene on Ag/NZ5 Modified with Ammonia: Hierarchical Structure and Metal Dispersion Effects

Qi,

Yang,

et al. 2024

Molecules

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Trace ethylene poses a significant challenge during the storage and transportation of agricultural products, causing over-ripening, reducing shelf life, and leading to food waste. Zeolite-supported silver adsorbents show promise for efficiently removing trace ethylene. Herein, hierarchical Ag/NZ5(X) adsorbents were prepared via different ammonia modifications, which featured enhanced ethylene adsorption ability. Ag/NZ5(2.5) exhibited the largest capacity and achieved near-complete removal at room temperature with prolonged efficacy. Characterization results indicated that the ammonia modification led to the formation of a hierarchical structure in the zeolite framework, reducing diffusion resistance and increasing the accessibility of the active sites. Additionally, desilication effects increased the defectiveness, generating a stronger metal–support interaction and resulting in a higher metal dispersion rate. These findings provide valuable insights into the development of efficient adsorbents for removing trace ethylene, thereby reducing food waste and extending the shelf life of agricultural products.

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Section: Resultsmentioning

confidence: 99%

Section: Ethylene Adsorption Performance Of Ag/nz5(x)mentioning

confidence: 99%

Enhanced Adsorption of Trace Ethylene on Ag/NZ5 Modified with Ammonia: Hierarchical Structure and Metal Dispersion Effects

Qi,

Yang,

et al. 2024

Molecules

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show abstract

“…of oxygen atoms [47]. The primary (consisting of the central atom and terminal oxygen) and secondary building blocks (bridging via oxygen-oxygen atoms) can be observed (Figure 9) in zeolites [48].…”

Section: Type Physical Propertiesmentioning

confidence: 98%

“…Zeolite has been used in gas adsorption [46], water t struction, agriculture, petroleum refining, detergent buil additives. Zeolite is produced from alumina (AlO 4 5− ) and of oxygen atoms [47]. The primary (consisting of the cen and secondary building blocks (bridging via oxygen-oxy ure 9) in zeolites [48].…”

Section: Type Physical Propertiesmentioning

confidence: 99%

“…Currently, China is the olite) in the world, followed by South Korea and Slovaki Zeolite has been used in gas adsorption [46], water treatment, soil amendment, construction, agriculture, petroleum refining, detergent builders, catalysts, and animal feed additives. Zeolite is produced from alumina (AlO 5− 4 ) and silica (SiO 4− 4 ) via the interlinkage of oxygen atoms [47]. The primary (consisting of the central atom and terminal oxygen) and secondary building blocks (bridging via oxygen-oxygen atoms) can be observed (Figure 9) in zeolites [48].…”

Section: Type Physical Propertiesmentioning

confidence: 99%

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Low-Cost Adsorbents for the Removal of Phenol/Phenolics, Pesticides, and Dyes from Wastewater Systems: A Review

Soonmin

2022

Water

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The huge development of industrial production and human activities throughout the world has resulted in serious water pollution. Pesticides, dyes, phenol, and phenolic compounds may be life-threatening to humans and marine aquatic animals, even at low concentrations. These pollutants must be removed by using different techniques to provide high-quality water. So far, the adsorption process has been considered an effective method to remove pollutants from an aqueous solution. The adsorption method has several advantages, such as low cost, easy operation, and high performance. This article reviewed the removal of dye, pesticides, phenol, and phenolic compounds through zeolite, activated carbon, clay, ash fly, and carbon nanotubes by reviewing the existing literature from 2000 to 2022. The properties of the adsorbent, adsorption studies, the method of design, and optimization conditions were reported. The thermodynamic studies were conducted to determine Gibbs free energy change, standard entropy change, and standard enthalpy change. Adsorption isotherms (Langmuir, Freundlich, and Temkim models) revealed the relationship between the amount of adsorbates per unit adsorbent in the equilibrium process. The adsorption kinetic investigations (pseudo-first-order and pseudo-second-order kinetic model) were carried out to determine the rate of adsorption and correlate the experimental data. Experimental results indicated that a higher adsorption capacity can be observed when the adsorbents have a high surface area and high-porosity structure. The removal percentage of pollutants increased when the adsorbent dosage was increased due to the availability of a larger number of adsorption sites. In conclusion, cheaper adsorbents can be used in wastewater treatment to improve water quality and protect the environment.

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Zeolites for the separation of ethylene, ethane, and ethyne

Wang,

Li,

Zhang

et al. 2024

Front. Chem. Sci. Eng.

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Adsorption equilibria and kinetics of ethane and ethylene on zeolite 13X pellets

Cited by 13 publications

References 50 publications

Enhanced Adsorption of Trace Ethylene on Ag/NZ5 Modified with Ammonia: Hierarchical Structure and Metal Dispersion Effects

Enhanced Adsorption of Trace Ethylene on Ag/NZ5 Modified with Ammonia: Hierarchical Structure and Metal Dispersion Effects

Low-Cost Adsorbents for the Removal of Phenol/Phenolics, Pesticides, and Dyes from Wastewater Systems: A Review

Zeolites for the separation of ethylene, ethane, and ethyne

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