Integrated study of the porous structure of active carbons from carbonized sucrose

Dubinin, M. M.; Plavnik, G. M.; Zaverina, E. D.

doi:10.1016/0008-6223(64)90040-5

Cited by 87 publications

(16 citation statements)

References 4 publications

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“…A number of relations between the parameter of micropore structure (micropore half-width) and B have been developed up till now (see references in (50)). The best known of them, originally proposed by Dubinin (51), is defined by…”

Section: Novel Methods and Numerical Algorithm Applied To The Evaluatimentioning

confidence: 99%

Evaluation of the Structural and Energetic Heterogeneity of Microporous Carbons by Means of Novel Numerical Methods and Genetic Algorithms

Kowalczyk

Terzyk²,

Gauden³

et al. 2002

Journal of Colloid and Interface Science

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Section: Novel Methods and Numerical Algorithm Applied To The Evaluatimentioning

confidence: 99%

Evaluation of the Structural and Energetic Heterogeneity of Microporous Carbons by Means of Novel Numerical Methods and Genetic Algorithms

Kowalczyk

Terzyk²,

Gauden³

et al. 2002

Journal of Colloid and Interface Science

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“…In the development of Dubinin's theory, early experiments using different sized molecular probes suggested that the structural constant (B) of the original DR equation, effectively E 0 of (1), was related to the size of the micropores. Subsequent studies using small angle x-ray scattering showed E 0 , to be an inverse function of the gyration radius of the micropores (Dubinin et al 1964) and various subsequent studies, for example (Stoecki 1997) have shown an empirical correlation between the micropore width (L/nm) and E 0 to be given by:…”

Section: Theorymentioning

confidence: 99%

Effects of active carbon pore size distributions on adsorption of toxic organic compounds

Branton

Bradley²

2010

Adsorption

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The use of active carbons for the removal of toxic organic compounds, for example from air or smoke, is of significant interest. In this paper, the equilibrium and dynamic adsorption characteristics of two active carbons are explored; one microporous coconut based and the other micro-mesoporous derived from a synthetic resin. Benzene, acetaldehyde and acrylonitrile were chosen as the probe toxicant vapours and adsorption was measured at a temperature of 298 K. The nitrogen equilibrium data (at 77 K), analysed using the BET, Dubinin-Radushkevich equations and DFT models, showed a higher overall adsorption capacity, more supermicroporosity and a higher proportion of pores wider than 2 nm for the synthetic resin based material. A micropore distribution biased toward the ultramicropore widthrange was observed for the nutshell material. As a consequence, the characteristic adsorption energies in micropores are higher for the nutshell material than the resin based carbon. The effect of these different pore size characteristics on the adsorption kinetics, obtained by fitting the data to the linear driving force (LDF) model, is that the resulting adsorption rate constants are higher across much of the relative pressure range (p/p s ) studied for the resin based carbon compared to the nutshell material. Significantly, the wider pores of the resin-based carbon result in higher rates of adsorption in the micropore filling domain. When evaluated P. Branton ( ) Group Research and Development, British American Tobacco, Regents Park Road, Millbrook, Southampton SO15 8TL, UK e-mail: peter_branton@bat.com R.H. Bradley Carbon Technology, MatSIRC Ltd., Penrith, Cumbria CA10 1NW, UK e-mail: matsirc@btinternet.com under dynamic conditions in cigarette smoke, improved toxicant removal was observed using the resin based carbon.

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“…The growth of these radii can be observed in all curves, which is a consequence of the formation and growth of small, partially crystallized basic structural units [39]. Another interpretation is that the Guinier scattering of microor mesopores can be observed, due to the Babinet principle.…”

Section: Analysis Of the Scattering Curvesmentioning

confidence: 71%

Small-angle X-ray scattering experiments and computer simulations to characterise anisotropy of activated carbons prepared from wood

Wacha

Varga

Vainio

et al. 2011

Carbon

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Small-angle scattering was measured from activated carbon monoliths prepared from three different wood species (European beech, Pedunculate oak and Norwegian spruce). Substantial differences were found in the scattering images of axial and tangential slices, attributed to their characteristic phytogenic structures. The decrease in anisotropy in the nanostructured carbon matrix due to the activation process is also different among the three investigated types of wood. For quantitative characterization of the anisotropy and its decrease, the degree of alignment was calculated from the azimuthal scattering curves. A simple numeric model was constructed on the basis of direct information obtained by atomic force microscopy. Scattering patterns calculated from the model were compared with the experimental ones to explain the possible structural changes in the carbon skeleton.

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Integrated study of the porous structure of active carbons from carbonized sucrose

Cited by 87 publications

References 4 publications

Evaluation of the Structural and Energetic Heterogeneity of Microporous Carbons by Means of Novel Numerical Methods and Genetic Algorithms

Evaluation of the Structural and Energetic Heterogeneity of Microporous Carbons by Means of Novel Numerical Methods and Genetic Algorithms

Effects of active carbon pore size distributions on adsorption of toxic organic compounds

Small-angle X-ray scattering experiments and computer simulations to characterise anisotropy of activated carbons prepared from wood

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