Significance of extra-framework monovalent and divalent cation motion upon CO2 and N2 sorption in zeolite X

Peters, Silda; Pillai, Renjith S.; Jasra, Raksh V.

doi:10.1016/j.matpr.2022.06.105

Cited by 2 publications

(2 citation statements)

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“…They not only have remarkable CO 2 adsorption uptake but the extraordinary CO 2 /CH 4 and CO 2 /N 2 selectivity. Peters et al have also reported that the divalent cation-exchanged 13X could be an interesting adsorbent for separating CO 2 at low atmospheric pressures.…”

Section: Results and Discussionmentioning

confidence: 99%

Equilibrium and Kinetic Insights into the Comprehensive Investigation of CO₂, CH₄, and N₂ Adsorption on Cation-Exchanged X and Y Faujasite Zeolites

Najafi,

Khorasheh,

Soltanali

et al. 2023

Langmuir

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The adsorption equilibria and kinetic performance of CO 2 , CH 4 , and N 2 on pelletized cation-exchanged faujasite zeolites (with alkali, alkaline earth, and transition metal ions) have been investigated by an innovative volumetric apparatus simultaneously. The standard instrumental analytical techniques, including X-ray diffraction, field emission scanning electron microscopy, energy dispersive X-ray spectroscopy (EDX), and atomic absorption spectroscopy (AAS), were utilized to characterize binder-free modified zeolites. EDX and AAS analyses revealed that the ion exchange was successfully achieved. The results indicate that the type of cation present in the zeolite framework and the Si/Al ratio can have a significant impact on the adsorption capacity and kinetic performance. The obtained isotherms were determined by three isotherm models, and the Langmuir−Freundlich (Sips) model was found to show the best agreement with the experimental isotherm data for all gases. The CO 2 uptakes of KX, MgX, and CaX reached 4.13, 4.79, and 5.48 mmol/g, respectively. The effective binary and kinetic selectivities of CO 2 /CH 4 and CO 2 /N 2 were also calculated. Among all samples, KX showed the highest CO 2 /CH 4 and CO 2 /N 2 selectivities of 54.46 and 91.62, respectively. Pseudo-first-, pseudo-second-order, and Avrami kinetic models were fitted to the experimental kinetic data to analyze the adsorption kinetics. Finally, the macropore diffusion coefficient (D p ) and microporous diffusional time constant (D c /r c 2 ) were estimated by correlating the micropore−macropore kinetic model with the experimental fractional uptake curves. Among the ion-exchanged zeolite samples, the K + form exhibits a suitable performance in terms of kinetic behavior and adsorption capacity.

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Section: Results and Discussionmentioning

confidence: 99%

Equilibrium and Kinetic Insights into the Comprehensive Investigation of CO₂, CH₄, and N₂ Adsorption on Cation-Exchanged X and Y Faujasite Zeolites

Najafi,

Khorasheh,

Soltanali

et al. 2023

Langmuir

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“…In response to this problem, many promising new materials have been developed to capture gases polluted with CO 2 and NO 2 . − A variety of solid physical adsorbents have been considered for the capture of these gases, such as microporous and mesoporous structures based on carbon (activated carbon (AC) and carbon molecular sieves), mesoporous siliceous materials, zeolites, and metal–organic frameworks (MOFs), metal oxides, and others. − Commercial ACs are usually obtained from nonrenewable materials such as waste oil, coal, and wood, making them an expensive product . Research efforts have been directed, in particular, at the use of waste as raw material and environmentally friendly processes to reduce costs in the synthesis process and the regeneration stage. , …”

Section: Introductionmentioning

confidence: 99%

CO₂ Capture from Porous Carbons Developed from Olive Pruning Agro-Industrial Residue

Ramos,

Mamaní,

Erans

et al. 2024

Energy Fuels

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This work studied the synthesis of activated carbons (ACs) from olive tree pruning waste since the recovery of this abundant residue for producing AC is a sustainable and environmentally friendly alternative. The physical and KOHchemical activation processes were compared and analyzed to obtain an appropriate carbon for the adsorption of CO 2 . Highly microporous carbons were obtained after KOH chemical activation that exhibit high surface area (3526 m 2 g −1 ), micropore volume (1.20 cm 3 g −1 ), and total volume (1.79 cm 3 g −1 ). The equilibrium and kinetic behavior of carbons for CO 2 adsorption were studied using Langmuir, Freundlich, and Temkin models for the isotherms and pseudo-first-order and pseudo-second-order models for the kinetics. The chemically activated carbon was found to be the most appropriate for the capture of CO 2 at low and high CO 2 pressures, showing an adsorption capacity of 5.1 mmol g −1 at 0 °C and 1 bar. The estimated isosteric heat indicates that the CO 2 adsorption process was feasible and confirms the pure physical adsorption of CO 2 . The chemically activated carbon allowed ten reuse cycles, maintaining the capture capacity. These results confirm that ACs from olive tree pruning residue have suitable capacity and stability for application as CO 2 adsorbents.

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Significance of extra-framework monovalent and divalent cation motion upon CO2 and N2 sorption in zeolite X

Cited by 2 publications

References 57 publications

Equilibrium and Kinetic Insights into the Comprehensive Investigation of CO₂, CH₄, and N₂ Adsorption on Cation-Exchanged X and Y Faujasite Zeolites

Equilibrium and Kinetic Insights into the Comprehensive Investigation of CO₂, CH₄, and N₂ Adsorption on Cation-Exchanged X and Y Faujasite Zeolites

CO₂ Capture from Porous Carbons Developed from Olive Pruning Agro-Industrial Residue

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Significance of extra-framework monovalent and divalent cation motion upon CO2 and N2 sorption in zeolite X

Cited by 2 publications

References 57 publications

Equilibrium and Kinetic Insights into the Comprehensive Investigation of CO2, CH4, and N2 Adsorption on Cation-Exchanged X and Y Faujasite Zeolites

Equilibrium and Kinetic Insights into the Comprehensive Investigation of CO2, CH4, and N2 Adsorption on Cation-Exchanged X and Y Faujasite Zeolites

CO2 Capture from Porous Carbons Developed from Olive Pruning Agro-Industrial Residue

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Product

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About

Equilibrium and Kinetic Insights into the Comprehensive Investigation of CO₂, CH₄, and N₂ Adsorption on Cation-Exchanged X and Y Faujasite Zeolites

Equilibrium and Kinetic Insights into the Comprehensive Investigation of CO₂, CH₄, and N₂ Adsorption on Cation-Exchanged X and Y Faujasite Zeolites

CO₂ Capture from Porous Carbons Developed from Olive Pruning Agro-Industrial Residue