The combined use of different approaches in the characterization of microporous carbons

Rodríguez‐Reinoso, F.; Garrido, Julián; Martín-Martínez, J.M.; Molina‐Sabio, M.; Torregrosa, R.

doi:10.1016/0008-6223(89)90153-x

Cited by 169 publications

(71 citation statements)

References 16 publications

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“…The samples were previously degassed for 4 h at 523 K. Nitrogen adsorption data were used to determine: i) the total pore volume (V N2,total ) at a relative pressure of 0.95, ii) the BET specific surface area (SBET), iii) the micropore volume (V N2,DR ) by application of the Dubinin-Radushkevich equation (DR) 13 and iv) pore size distribution by applying the Quenched solid density functional theory (QSDFT; slit-shape model) to the N 2 adsorption data. The difference between V N2,total and V N2,DR is considered to be the mesopore volume (V meso ).…”

Section: 11mentioning

confidence: 99%

High-Pressure Methane Storage in Porous Materials: Are Carbon Materials in the Pole Position?

et al. 2015

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Natural gas storage on porous materials (ANG) is a promising alternative to conventional on-board compressed (CNG) or liquefied natural gas (LNG). Until date, MOF materials have apparently been the only system published in the literature able to reach the new DOE value of 263 cm 3 (STP: 273.15K, 1 atm)/cm 3 ; however, this value was obtained by using the ideal single-crystal density to calculate the volumetric capacity. Here we prove experimentally and for the first time that properly designed activated carbon materials can really achieve the new DOE value but avoiding the additional drawback usually associated with MOF materials, i.e. the low mechanical stability under pressure (conforming) required for any practical application.

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Section: 11mentioning

confidence: 99%

High-Pressure Methane Storage in Porous Materials: Are Carbon Materials in the Pole Position?

et al. 2015

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“…Adsorption analysis at atmospheric pressure using a slightly smaller molecule compared to N 2 as CO 2 (0.36 nm vs. 0.33 nm) and a higher adsorption temperature (0ºC vs. -196ºC) has been proposed by some of us for the characterization of the narrow microporosity in porous solids (pores below 0.7 nm) [29,30]. Furthermore, CO 2 adsorption can be used to evaluate the presence of narrow constrictions usually inaccessible to N 2 at cryogenic temperatures [31].…”

Section: Co 2 Adsorption Analysis At Atmospheric and High Pressurementioning

confidence: 99%

High selectivity of TiC-CDC for CO2/N2 separation

Silvestre-Albero

Rico-Francés

Rodríguez‐Reinoso

et al. 2013

Carbon

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A series of carbide-derived carbons (CDC) have been prepared starting from TiC and using different chlorine treatment temperatures (500ºC-1200ºC). Contrary to N 2 adsorption measurements at -196ºC, CO 2 adsorption measurements at room temperature and high pressure (up to 1 MPa) together with immersion calorimetry measurements into dichloromethane suggest that the synthesized CDC exhibit a similar porous structure, in terms of narrow pore volume, independently of the temperature of the reactive extraction treatment used (samples synthesized below 1000ºC). Apparently, these carbide-derived carbons exhibit narrow constrictions were CO 2 adsorption under standard conditions (0ºC and atmospheric pressure) is kinetically restricted. The same accounts for a slightly larger molecule as N 2 at a lower adsorption temperature (-196ºC), i.e. textural parameters obtained from N 2 adsorption measurements on CDC 2 must be underestimated. Furthermore, here we show experimentally that nitrogen exhibits an unusual behavior, poor affinity, on these carbide-derived carbons. CH 4 with a slightly larger diameter (0.39 nm) is able to partially access the inner porous structure whereas N 2 , with a slightly smaller diameter (0.36 nm), does not. Consequently, these CDC can be envisaged as excellent sorbent for selective CO 2 capture in flue-gas streams.

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“…The values obtained for specific surface area depend on the method of measurement, the size of the probe molecule and the measurement temperature. N 2 adsorption at 77 K is the most popular method for determining the surface area and characterizing the pore structure of activated carbons (Bradley and Rand 1995;Capelle and de Vooys 1983;Fernandez-Colinas et al 1989a;Fernandez-Colinas et al 1989b;Rodriguezreinoso et al 1989;Sing 1994;Thommes et al 2012). However, the determination of the micropores size distribution remains a difficult problem.…”

Section: Morphological Analysismentioning

confidence: 99%

Activated carbons for applications in catalysis: the point of view of a physical-chemist

Lazzarini

2017

Rend. Fis. Acc. Lincei

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This paper is a concise review on the principal physical-chemical techniques available to investigate the structural and surface properties of activated carbons (ACs) for catalytic applications. The same activated carbon has been characterized by an incredible amount of techniques: Solid State-Nuclear Magnetic Resonance, X-Ray Powder Diffraction and Raman spectroscopy for structural characterization, X-ray Photoelectron Spectroscopy, Inelastic Neutron Scattering and FT-IR spectroscopy for surface analysis, instead. The main goal is to discuss the advantages and disadvantages of all the techniques and to propose a multi-technique approach that should help in avoiding misinterpretations, as often found in the specialized literature.

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The combined use of different approaches in the characterization of microporous carbons

Cited by 169 publications

References 16 publications

High-Pressure Methane Storage in Porous Materials: Are Carbon Materials in the Pole Position?

High-Pressure Methane Storage in Porous Materials: Are Carbon Materials in the Pole Position?

High selectivity of TiC-CDC for CO2/N2 separation

Activated carbons for applications in catalysis: the point of view of a physical-chemist

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