Comparative study of carbide-derived carbons obtained from biomorphic TiC and SiC structures

Kormann, Martina; Gerhard, Helmut; Popovska, N.

doi:10.1016/j.carbon.2008.10.002

Cited by 52 publications

(24 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The pore structure can be further analyzed by small-angle scattering techniques like X-ray scattering (SAXS) or neutron scattering (SANS), which allows also probing closed pores. For titanium carbide-derived carbon (TiC-CDC), which is subject of this study, sorption isotherm analysis [16][17][18][19][20][21][22] and scattering [16,[23][24][25] results are discussed in literature, showing that TiC-CDC synthesized below 900 °C shows pore sizes in the range of carbon molecular sieves. Equilibrium CO 2 adsorption isotherms demonstrated that with TiC-CDC high CO 2 uptakes can be realized [26].…”

Section: Introductionmentioning

confidence: 99%

High selectivity of TiC-CDC for CO2/N2 separation

Silvestre-Albero

Rico-Francés

Rodríguez‐Reinoso

et al. 2013

Carbon

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

High selectivity of TiC-CDC for CO2/N2 separation

Silvestre-Albero

Rico-Francés

Rodríguez‐Reinoso

et al. 2013

Carbon

View full text Add to dashboard Cite

show abstract

“…It has been found that CDC can be synthesized with almost all known carbon structures from amorphous carbon to nano-diamond [5][6][7][8][9], which are greatly dependent upon the structure of the carbide precursor as well as the process parameters (eg., temperature, operating time, etching agent, concentration, catalysts, etc.) [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 98%

Hollow carbon onions with larger lattice spacing obtained by chlorination of the ball-milled SiC

Zhang

Wang

et al. 2012

Materials Letters

View full text Add to dashboard Cite

“…It has been established that etching different carbide precursors results in CDCs with diverse pore structures, so TiC-CDC will not necessarily have the same structure as SiC-CDC. However, the pore structures of TiC-CDCs and SiC-CDCs have been found to be similar in experimentally characterized samples [30,31] and given the nanometer-scale size of the atomistic structural models considered in this work, the porous nature of TiC-CDCs should be captured using structures similar to this SiC-CDC model. The SiC-CDC model was therefore used as a starting point to generate additional porous carbon structural models for TiC-CDC materials.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Computational investigation on CO2 adsorption in titanium carbide-derived carbons with residual titanium

Zhang

Dutzer

Liang

et al. 2017

Carbon

View full text Add to dashboard Cite

This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractWe develop a new approach for modeling titanium carbide derived-carbon (TiC-CDC) systems with residual titanium by the generation of modified atomistic structures based on a silicon carbide derived-carbon (SiC-CDC) model and the application of weighted combinations of these structures.In our approach, the original SiC-CDC structure is modified by (i) removing carbon, (ii) adding carbon and (iii) adding titanium. The new atomic scale carbide-derived carbon (CDC) structures are investigated using classical molecular dynamics simulations, and their pure CO 2 adsorption isotherms are calculated using grand canonical Monte Carlo simulations. The system of TiC-CDC with residual titanium is modeled as weighted combinations of pure carbon CDC structures, CDC structures with titanium and a TiC crystalline structure. Our modeling is able to produce both M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPTstructural properties and adsorption isotherms in accordance with experimental data. The fraction of different models in the systems successfully reflects the structural differences in various experimental TiC-CDC samples. The modeling also suggests that in partially etched TiC-CDC systems, the titanium that may be accessible to CO 2 gas at the transitional interface may provide significant interaction sites for CO 2 and may lead to more efficient overall gas adsorption.

show abstract

Comparative study of carbide-derived carbons obtained from biomorphic TiC and SiC structures

Cited by 52 publications

References 15 publications

High selectivity of TiC-CDC for CO2/N2 separation

High selectivity of TiC-CDC for CO2/N2 separation

Hollow carbon onions with larger lattice spacing obtained by chlorination of the ball-milled SiC

Computational investigation on CO2 adsorption in titanium carbide-derived carbons with residual titanium

Contact Info

Product

Resources

About