Applicability of adsorption equations to argon, nitrogen and volatile organic compound adsorption onto activated carbon

Paulsen, Paul David; Moore, Brian C. J.; Cannon, Fred S.

doi:10.1016/s0008-6223(99)00062-7

Cited by 20 publications

(12 citation statements)

References 16 publications

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“…The average micropore width of each activated carbon was determined from <20 and <30 Å regions of pore size distribution results. Our pore size distribution data and those of others [14] indicated that in many cases the micropore volume determined from Dubinin equation had a better agreement with the cumulative pore volume of up to 30 Å than up to 20 Å obtained from DFT. Therefore, the average pore sizes obtained both in <30 and <20 Å ranges were used in the data analysis.…”

Section: Characterization Of Adsorbentssupporting

confidence: 74%

The effect of the physical and chemical characteristics of activated carbons on the adsorption energy and affinity coefficient of Dubinin equation

Dastgheib

Karanfil

2005

Journal of Colloid and Interface Science

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Section: Characterization Of Adsorbentssupporting

confidence: 74%

The effect of the physical and chemical characteristics of activated carbons on the adsorption energy and affinity coefficient of Dubinin equation

Dastgheib

Karanfil

2005

Journal of Colloid and Interface Science

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“…Pore volumes and the maximum pore widths were determined via NLDFT and these are also reported in Table 3. The NLDFT technique is very reliable, although it has been observed that accuracy decreases as pore width increases [54,55]. Therefore the pore volume and widths displayed in Table 3 may vary slightly from the actual values.…”

Section: Surface Analysismentioning

confidence: 99%

Structural and Activity Investigation into Al3+, La3+ and Ce3+ Addition to the Phosphomolybdate Heteropolyanion for Isobutane Selective Oxidation

et al. 2010

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Twelve phosphomolybdate compounds were synthesized via cationic exchange and were of the form: M x H 3-3x [PMo 12 O 40 ] (M = Al, La or Ce; 0 B x B 1). These compounds were analyzed by XRD and adsorption isotherm. Aluminum addition causes a primitive cubic phase, while lanthanum and cerium yield body-centered structures. La and Ce addition reduces surface area of phosphomolybdate structure. Temperature-programmed experiments for the selective oxidation of isobutane yielded methacrolein, 3-methyl-2-oxetanone (lactone), acetic acid (not with aluminous compounds), propene (only with aluminous compounds), carbon dioxide and water. The preference for propene rather than acetic acid formation with Al 3? may be due to the smaller cation size, or primitive cubic structure. These products form via two distinct reaction processes, labeled categories 1 and 2. Category 1 formation is associated with isobutane forming products on the surface, but reaction rate determined by bulk migration of charged particles. Category 2 formation is concerned with isobutane penetrating deep within the bulk of the substrate and forming products which subsequently desorb in a series of bell-shaped humps. Methacrolein forms via both category 1 and 2, whilst all other products form via category 2 exclusively. Kinetic analysis showed apparent activation barriers for category 1 methacrolein formation range from 67 ± 2 kJ mol -1 to [350 kJ mol -1 , and occur in groups with small, medium and large activation barriers. The addition of ?3 metal cations to the phosphomolybdate anion increase thermal stability, significantly decreasing deactivation; IR spectroscopy shows that the Keggin structure remains intact during temperature-programmed experiments with the Al, La and Ce salts.

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“…The preceding parameters are regressed by fitting Eq. 3 to the experimental data of Paulsen et al (1999) and Mazyck and Cannon (2000), and can be regarded as a good representative for a wide variety of activated carbons.…”

Section: Definition Of the Adsorbent Pore Structurementioning

confidence: 99%

Redistribution of adsorbed VOCs in activated carbon under electrothermal desorption

Cheng

Grévillot

et al. 2002

AIChE Journal

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Applicability of adsorption equations to argon, nitrogen and volatile organic compound adsorption onto activated carbon

Cited by 20 publications

References 16 publications

The effect of the physical and chemical characteristics of activated carbons on the adsorption energy and affinity coefficient of Dubinin equation

The effect of the physical and chemical characteristics of activated carbons on the adsorption energy and affinity coefficient of Dubinin equation

Structural and Activity Investigation into Al3+, La3+ and Ce3+ Addition to the Phosphomolybdate Heteropolyanion for Isobutane Selective Oxidation

Redistribution of adsorbed VOCs in activated carbon under electrothermal desorption

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