2019
DOI: 10.1021/acsami.9b13247
|View full text |Cite
|
Sign up to set email alerts
|

Novel Porous Carbons Derived from Coal Tar Rejects: Assessment of the Role of Pore Texture in CO2 Capture under Realistic Postcombustion Operating Temperatures

Abstract: Activated carbons (ACs) are among the most commonly used sorbents for CO 2 capture because of their high surface areas and micropore volumes, which depend on precursor and activation methods. In this study, we evaluated different ACs obtained from a low-value fraction of liquidderived coal pyrolysis, namely phenolic oil, which was used as gel precursor before carbonization and KOH activation. CO 2 capture performances were determined at temperatures 2 between 25 and 120°C, with CO 2 concentrations ranging from… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
4
1

Citation Types

4
25
1

Year Published

2020
2020
2024
2024

Publication Types

Select...
7

Relationship

3
4

Authors

Journals

citations
Cited by 21 publications
(30 citation statements)
references
References 54 publications
4
25
1
Order By: Relevance
“…Although the kinetic diameters of N 2 and CO 2 are quite similar (3.6 and 3.3 nm, respectively), CO 2 physisorption at 273 K is a much faster process than that of N 2 at 77 K because molecular diffusion is highly temperaturedependent 50,51 . CO 2 adsorption isotherms give a reliable indication of porosity with a diameter of less than 1 nm because CO 2 is adsorbed in pores where N 2 cannot enter, within the set equilibrium times 50,52 .…”
Section: Textural Characterizationmentioning
confidence: 99%
“…Although the kinetic diameters of N 2 and CO 2 are quite similar (3.6 and 3.3 nm, respectively), CO 2 physisorption at 273 K is a much faster process than that of N 2 at 77 K because molecular diffusion is highly temperaturedependent 50,51 . CO 2 adsorption isotherms give a reliable indication of porosity with a diameter of less than 1 nm because CO 2 is adsorbed in pores where N 2 cannot enter, within the set equilibrium times 50,52 .…”
Section: Textural Characterizationmentioning
confidence: 99%
“…Without treatment, they proved to be extremely hydrophobic materials (water contact angle higher than 157°) and were very efficient for selectively trapping, within a few seconds only, hydrocarbons such as heptane spread at the surface of water [118]. The same feature, associated with a rather high packing density, makes them very interesting for capturing CO2 in real conditions, i.e., from wet and hot (> 75°C) gaseous streams [119]. Activation dramatically increased the surface area and both the connectivity between micropores and mesopores and the oxygen content at the material surface.…”
Section: Ordered Mesoporous Carbons From Soft-templatingmentioning
confidence: 99%
“…The pore size distributions (PSDs) of the carbon materials were obtained by applying the Non-Local Density Functional Theory (2D-NLDFT, SAIEUS software) to both the N 2 and the CO 2 isotherms. The surface areas were calculated by applying: (i) the BET equation to the nitrogen isotherms as detailed in [22], leading to A BET (m 2 g -1 ); and (ii) the Non-Local Density Functional Theory (2D-NLDFT-HS), with SAIEUS software, to both N 2 and CO 2 isotherms, leading to S NLDFT (m 2 g -1 ) [23]. The surface areas of the micropores and mesopores, S micro and S meso (m 2 g -1 ), respectively, were calculated from the PSDs [22].…”
Section: Materials Characterisationmentioning
confidence: 99%
“…The surface areas were calculated by applying: (i) the BET equation to the nitrogen isotherms as detailed in [22], leading to A BET (m 2 g -1 ); and (ii) the Non-Local Density Functional Theory (2D-NLDFT-HS), with SAIEUS software, to both N 2 and CO 2 isotherms, leading to S NLDFT (m 2 g -1 ) [23]. The surface areas of the micropores and mesopores, S micro and S meso (m 2 g -1 ), respectively, were calculated from the PSDs [22]. The total pore volumes, V T and V NLDFT (cm 3 g -1 ), were determined from the N 2 isotherms and from the PSDs, respectively [22].…”
Section: Materials Characterisationmentioning
confidence: 99%
See 1 more Smart Citation