Enhancing the CO2, CH4, and N2 adsorption and kinetic performance on FAU zeolites for CO2 capture from flue gas by metal incorporation technique

Najafi, Amir Mohammad; Soltanali, Saeed; Ghassabzadeh, Hamid

doi:10.1016/j.cej.2023.143719

Cited by 17 publications

(4 citation statements)

References 82 publications

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“…The use of fossil fuels as the primary source of energy, as well as different chemical processes has contributed to the production of huge amounts of greenhouse gases (GHG) with the advancement of technology and the industrial revolution. , GHG include carbon dioxide (CO 2 ), chlorofluorocarbons, nitrous oxide, methane (CH 4 ), etc. CO 2 is one of the major GHG created by mankind.…”

Section: Introductionmentioning

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: Introductionmentioning

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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“…Adsorption selectivity is the ratio of adsorbed moles to volume moles of two fluids’ fractions. This ratio determines the competitive adsorption performance, with higher adsorption selectivity indicating robust molecules that can replace pre-adsorbed ones at adsorption sites . The adsorption isotherm can be fitted using the Langmuir model equation. q = q m b 1 + b p where q is the adsorption amount, q m is the maximum adsorption capacity, p is the pressure, and b is the Langmuir constant …”

Section: Methodsmentioning

confidence: 99%

“…This ratio determines the competitive adsorption performance, with higher adsorption selectivity indicating robust molecules that can replace pre-adsorbed ones at adsorption sites. 15 The adsorption isotherm can be fitted using the Langmuir model equation.…”

Section: Adsorption Selectivity Calculationmentioning

confidence: 99%

Facilely Grafting Small Amine Molecules into Co-Exchanged Zeolite for Enhancing CO₂ Adsorption

Yang,

Lin,

Zhao

et al. 2024

Ind. Eng. Chem. Res.

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Zeolites are promising materials for CO 2 adsorption, yet they still face the challenges of low adsorption capacity and selectivity. Herein, we report a strategy of grafting ethylenediamine to a Co-exchanged Y zeolite to improve the CO 2 adsorption capacity of Y zeolite via strong interactions between Co 2+ and amine groups. Functionalization of zeolite Y with amines (Co-Y-EN) enables significant improvement in the CO 2 adsorption capacity (4.36 mmol/g at 1 bar and 298 K), which is 1.73 times higher than that of pristine Na-Y zeolite. Moreover, Co-Y-EN demonstrates enhanced CO 2 selectivity, as confirmed by both singlecomponent gas adsorption experiments and breakthrough tests. The superior selectivity is attributed to the strong affinity between the amine sites and CO 2 molecules, as well as the optimized pore sizes for CO 2 adsorption. Overall, this study presents a straightforward approach to enhancing the CO 2 adsorption performance of zeolite materials.

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“…Zeolites are well known for their microporous structures and serve as efficient adsorbents across multiple industries, aiding in the separation of gases such as CH 4 , NH 3 , H 2 S, N 2 , O 2 , and CO 2 [2]. Despite extensive research on microporous zeolites of FAU and MOR topology, the understanding of the interplay between the structure, adsorption characteristics, and physicochemical properties of these materials remains incomplete, especially concerning gas adsorption at ambient or slightly elevated temperatures [3].…”

Section: Introductionmentioning

confidence: 99%

Structural Characterisation of Zeolites Derived from Lithium Extraction: Insights into Channel- and Cage-Type Frameworks

Santos,

Nascimento,

Pergher

2024

Minerals

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This study investigates the structural and adsorption characteristics of channel- and cage-type zeolites obtained through lithium extraction. Through XRD, FT-IR spectroscopy, and adsorption isotherm analyses, distinct adsorption behaviours of CH4 and CO2 were observed in both zeolite types. Cage-type zeolites exhibited higher adsorption capacities attributed to their structural advantages, highlighting the importance of structural framework selection in determining adsorbent efficacy. The presence of structural defects and an amorphous phase influenced adsorption behaviours, while thermodynamic data underscored the role of adsorbate properties. Kinetics studies revealed the influence of the structural framework on CH4 adsorption and CO2 adsorption kinetics. Analysis of adsorbate–adsorbent interactions demonstrated robust interactions, particularly with LPM16-Y. These findings offer insights into the potential applications of zeolites in gas adsorption processes, emphasising the importance of structural properties and adsorbate characteristics in determining adsorption performance.

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Enhancing the CO2, CH4, and N2 adsorption and kinetic performance on FAU zeolites for CO2 capture from flue gas by metal incorporation technique

Cited by 17 publications

References 82 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

Facilely Grafting Small Amine Molecules into Co-Exchanged Zeolite for Enhancing CO₂ Adsorption

Structural Characterisation of Zeolites Derived from Lithium Extraction: Insights into Channel- and Cage-Type Frameworks

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Enhancing the CO2, CH4, and N2 adsorption and kinetic performance on FAU zeolites for CO2 capture from flue gas by metal incorporation technique

Cited by 17 publications

References 82 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

Facilely Grafting Small Amine Molecules into Co-Exchanged Zeolite for Enhancing CO2 Adsorption

Structural Characterisation of Zeolites Derived from Lithium Extraction: Insights into Channel- and Cage-Type Frameworks

Contact Info

Product

Resources

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

Facilely Grafting Small Amine Molecules into Co-Exchanged Zeolite for Enhancing CO₂ Adsorption