Equilibrium adsorption and kinetic study of CO2 and N2 on synthesized carbon Black–Zeolite composite

Khoramzadeh, Elham; Mofarahi, Masoud; Chung, Kyounghee; Lee, Chang Ha

doi:10.1016/j.seppur.2021.119917

Cited by 19 publications

(14 citation statements)

References 40 publications

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“…These profiles agree with those described in other investigations. ,, The CO 2 uptake was much greater than that of CH 4 and N 2 for all samples, as anticipated, which can be led to the selective adsorption of CO 2 over a mixture containing CO 2 , CH 4 , and N 2 or postcombustion flue gas. This could be due to the high degree of polarity and powerful permanent quadrupole moment of the CO 2 molecules, which can lead to a strong interaction with the electric field of the heterogeneous zeolite surface. , Although the polarizability values of CO 2 and CH 4 are close, the CO 2 quadrupole moment (4.3 × 10 –26 esu cm 2 ) is much higher than those of CH 4 and N 2 .…”

Section: Results and Discussionmentioning

confidence: 99%

“…This approach corresponds to a type I isotherm and adsorption amount in each step shown in Figure 2. 43 Having said that, in the case of CH 4 and N 2 , this amount is approximately constant in all steps, which contributed to the linear isotherm. These profiles agree with those described in other investigations.…”

Section: Adsorption Equilibrium Isothermsmentioning

confidence: 99%

“…The fractional uptake model true( q p ( t ) q normalp * true) from eq was fitted to the experimental fractional uptake ( m italict m ∞ ) from eq S3 by manipulating D p and D c / r c 2 . The genetic algorithm was carried as one of the most appropriate algorithms to minimize the root-mean-squared deviation (rmsd), defined by eq rmsd = ∑ i = 1 n ( m t m ∞ false( t false) − q normalp false( t false) q p * ) 2 N Where N is the number of experimental data points.…”

Section: Theorymentioning

confidence: 99%

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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%

Section: Adsorption Equilibrium Isothermsmentioning

confidence: 99%

Section: Theorymentioning

confidence: 99%

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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 preparation method in this paper was improved using the hydrothermal method reported by Khoramzadehet et al First, 1.5 g of NaOH, 0.5 g of Na 2 Al 2 O 4 , and 29 g of deionized water were mixed. Subsequently, under vigorous stirring, 0.09 g of Fe(NO 3 ) 3 ·9H 2 O solution was added to the mixed solution, and the solution was stirred until completely dissolved.…”

Section: Methodsmentioning

confidence: 99%

High Adsorption Capacity Fe@13X Zeolite for Direct Air CO₂ Capture

Xiang

Guo

Yin

et al. 2023

Ind. Eng. Chem. Res.

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The efficient separation of CO2 from air remains an important and challenging goal for direct air capture (DAC). Herein, iron-containing 13X zeolite (Fe@13X) with an efficient separation of CO2 from the air was synthesized via a simple one-step in situ crystallization method. The results demonstrate that Fe@13X exhibited outstanding DAC performance (the CO2 capacity of Fe@13X was 0.64 mmol/g, much higher than the 13X zeolite under simulated air), which was attributed to the introduction of Fe atoms, effectively narrowing the 13X micropore channel. Moreover, the DAC adsorption performance of Fe@13X in the temperature range from 25 to 75 °C was explored by combined thermogravimetric analysis and differential scanning calorimetry. The results revealed that low temperatures were more favorable for the adsorption of CO2 with a high adsorption rate but less selectivity. Furthermore, Fe@13X showed a 3 times higher CO2 production (0.003 kgCO2/kgads·h) and 3.6 times lower desorption energy (0.005 kW h/kgCO2 ) than 13X zeolite in 400 ppm CO2 in N2. Finally, Fe@13X exhibited excellent cycle stability in simulated air and maintained its initial CO2 uptake in 10 consecutive cycles, showing the broad application prospects of materials in industrial adsorption and separation.

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“…Chunzhi Shen et al, [8] have examined the kinetic parameters and the thermodynamic characteristics of CO 2 and N 2 on the activated carbon. Elham Khoramzadeh et al, [9] have analyzed the adsorption heats, the adsorption rate and the selectivity of CO 2 over N 2 on synthesized carbon. Honghong Yi et al, [10] have used a microwave (MAC) to analyze different gas isotherms such as CH 4 , N 2 and CO 2 on activated carbon and modeled it with Langmuir and Toth isotherm models.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of CO₂ and N₂ adsorption on activated carbon

Jedli

Almoneef

Mbarek

et al. 2023

Mater. Res. Express

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The present study as designed to assess the CO2 and N2 adsorption isotherms on activated carbon (AC). The AC was characterized with SEM, XRD and N2 isotherm. The CO2 and the N2 adsorption experiments on the AC are performed at 298, 308 and 328 K and modelled by Langmuir model. The preferred selectivity (αCO2/N2) was obtained with the use of the Langmuir properties and the Henry coefficient (KH) was found from the viral equation. The thermodynamic analysis of CO2 and N2 adsorption which include the entropy loss (ΔS), the Gibbs free energy change (ΔG) and the surface potential (Ω) was calculated. The results reveal that the order of CO2 uptake on AC is higher than that of N2. Moreover, the reduction of temperature increases the separation coefficients of CO2 on N2. The adsorption affinity and the adsorption spontaneity of CO2 is the highest, while N2 has the lowest adsorption spontaneity. Subsequently the CO2 has a higher interaction with AC, while the N2-AC interaction is the lightest. Subsequently, CO2 exhibits a higher interaction with AC, in contrast to N2 which displays a slight interaction.

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Equilibrium adsorption and kinetic study of CO2 and N2 on synthesized carbon Black–Zeolite composite

Cited by 19 publications

References 40 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

High Adsorption Capacity Fe@13X Zeolite for Direct Air CO₂ Capture

Experimental study of CO₂ and N₂ adsorption on activated carbon

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Equilibrium adsorption and kinetic study of CO2 and N2 on synthesized carbon Black–Zeolite composite

Cited by 19 publications

References 40 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

High Adsorption Capacity Fe@13X Zeolite for Direct Air CO2 Capture

Experimental study of CO2 and N2 adsorption on activated carbon

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

High Adsorption Capacity Fe@13X Zeolite for Direct Air CO₂ Capture

Experimental study of CO₂ and N₂ adsorption on activated carbon