Adsorption of gas mixtures in micropores: effect of difference in size of adsorbate molecules

Dunne, J. A.; Myers, Alan L.

doi:10.1016/0009-2509(94)e0112-4

Cited by 62 publications

(57 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Zeolites have a high potential for CO 2 capture, reaching an adsorption efficiency of 5.5 mmol of CO 2 /g of zeolite, combined with a degree of irreversible adsorption inferior to 10% (tables 1-3) [9][10][11][12][13][14][15][16][17][18][19][20][21]. The CO 2 adsorption is influenced by diverse structural characteristics of zeolites including size, polarizing power, distribution and the number of exchangeable cations in their cavities, the size of the pores and the Si/Al ratio.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Advances in principal factors influencing carbon dioxide adsorption on zeolites

Bonenfant

Kharoune

Niquette

et al. 2008

Science and Technology of Advanced Materials

274

179

View full text Add to dashboard Cite

We report the advances in the principal structural and experimental factors that might influence the carbon dioxide (CO 2 ) adsorption on natural and synthetic zeolites. The CO 2 adsorption is principally govern by the inclusion of exchangeable cations (countercations) within the cavities of zeolites, which induce basicity and an electric field, two key parameters for CO 2 adsorption. More specifically, these two parameters vary with diverse factors including the nature, distribution and number of exchangeable cations. The structure of framework also determines CO 2 adsorption on zeolites by influencing the basicity and electric field in their cavities. In fact, the basicity and electric field usually vary inversely with the Si/Al ratio. Furthermore, the CO 2 adsorption might be limited by the size of pores within zeolites and by the carbonates formation during the CO 2 chemisorption. The polarity of molecules adsorbed on zeolites represents a very important factor that influences their interaction with the electric field. The adsorbates that have the most great quadrupole moment such as the CO 2 , might interact strongly with the electric field of zeolites and this favors their adsorption. The pressure, temperature and presence of water seem to be the most important experimental conditions that influence the adsorption of CO 2 . The CO 2 adsorption increases with the gas phase pressure and decreases with the rise of temperature. The presence of water significantly decreases adsorption capacity of cationic zeolites by decreasing strength and heterogeneity of the electric field and by favoring the formation of bicarbonates. The optimization of the zeolites structural characteristics and the experimental conditions might enhance substantially their CO 2 adsorption capacity and thereby might give rise to the excellent adsorbents that may be used to capturing the industrial emissions of CO 2 .

show abstract

Section: Discussionmentioning

confidence: 99%

“…−1 at 273-373 K (tables 1-3) [9][10][11][12][13][14][15][16][17][18][19][20]. The degree of irreversible adsorption of CO 2 on zeolites M-ZSM-5 (M = Li + , Na + , K + , Rb + , Cs + ) which has been evaluated under a pressure inferior to 6.7 × 10 −2 MPa, was less than 10% of the total adsorption [21].…”

Section: Introductionmentioning

confidence: 99%

Advances in principal factors influencing carbon dioxide adsorption on zeolites

Bonenfant

Kharoune

Niquette

et al. 2008

Science and Technology of Advanced Materials

274

179

View full text Add to dashboard Cite

show abstract

“…This segregation can give rise to deviations from ideal adsorbed solution behavior Ž . Dunne and Myers, 1994;Dunne et al, 1997 . While experimentation supplies a wealth of information about multicomponent systems, a variety of theoretical approaches have also Correspondence concerning this article should be addressed to R. Q.…”

Section: Introductionmentioning

confidence: 98%

Hierarchical approach for simulation of binary adsorption in silicalite

Czaplewski

Snurr

1999

AIChE Journal

View full text Add to dashboard Cite

“…Simulations have been used to study fluids adsorbed in slit pores (Sarman, 1990;Somers and Davis, 1992;Murad et al, 1993;Han et al, 1993;Tan and Gubbins, 1992;Somers et al, 1993;Schoen et al, 1989;Jiang et al, 1993), cylindrical pores Suh, 1987, 1989;Groot et al, 1987;Antonchenko et al, 1988;Bratko et al, 1989;Heinbuch and Fischer, 1987;Glandt, 1980;Derouane and Lucas, 1988;Peterson et al, 1986;Peterson and Gubbins, 1987;Walton and Quirke, 1989;Saito and Foley, 1990;Demi, 1991), and spherical pores (Macpherson et al, 1987;Carignan et al, 1988;Dunne and Myers, 1994).…”

Section: Introductionmentioning

confidence: 99%

The effect of nanopore shape on the structure and isotherms of adsorbed fluids

1996

View full text Add to dashboard Cite

A Grand Canonical Monte Carlo simulation method is used to determine the adsorption isotherms, interaction energies, entropies, and density distribution of a Lennard-Jones fluid adsorbed in smooth-walled nanopores of varying size and shape. We specifically include very crowded pores, where packing effects are important. Differences in the isotherms of slit, cylindrical, and spherical nanopores of varying sizes can be explained in terms of the adsorbate-adsorbate interaction energy, the adsorbate-pore interaction energy, and the density profiles, which influence the balance between the former and the latter energy contributions. The expectation from low loading studies that the most energetically favorable adsorbate-pore interactions maximize adsorption is not borne out at intermediate and higher loadings. Instead, the relationships between adsorbed amounts and pore size and shape are found to be strong functions of the depth and steepness of the external potential, the extent to which adsorbateadsorbate repulsion establishes short range fluid order, and the accessible pore volume. This study has implications for high pore density processes in nanoporous materials, such as zeolite catalysis, separations, and templating in zeolite synthesis.

show abstract

Adsorption of gas mixtures in micropores: effect of difference in size of adsorbate molecules

Cited by 62 publications

References 8 publications

Advances in principal factors influencing carbon dioxide adsorption on zeolites

Advances in principal factors influencing carbon dioxide adsorption on zeolites

Hierarchical approach for simulation of binary adsorption in silicalite

The effect of nanopore shape on the structure and isotherms of adsorbed fluids

Contact Info

Product

Resources

About