Physical characterization of activated carbons with narrow microporosity by nitrogen (77.4K), carbon dioxide (273K) and argon (87.3K) adsorption in combination with immersion calorimetry

Carbon ◽  
2012 ◽  
Vol 50 (9) ◽  
pp. 3128-3133 ◽  
Author(s):  
J. Silvestre-Albero ◽  
A. Silvestre-Albero ◽  
F. Rodríguez-Reinoso ◽  
M. Thommes
Keyword(s):  
Carbon Dioxide ◽  
Activated Carbons ◽  
Physical Characterization ◽  
Immersion Calorimetry

Micropore characterization of activated carbons of respirator cartridges with argon, carbon dioxide, and organic vapors of different vapor pressures

Carbon ◽  
2015 ◽  
Vol 94 ◽  
pp. 781-791 ◽  
Author(s):  
Florence Janvier ◽  
Ludovic Tuduri ◽  
Daniel Cossement ◽  
Daniel Drolet ◽  
Jaime Lara
Keyword(s):  
Carbon Dioxide ◽  
Activated Carbons ◽  
Vapor Pressures ◽  
Organic Vapors

scholarly journals The Microporosity of Activated Carbon Fibre KF1500 Assessed by Combined CO2 Adsorption and Calorimetry Techniques and by Immersion Calorimetry

2000 ◽  
Vol 18 (1) ◽  
pp. 1-14 ◽  
Author(s):  
A. Guillot ◽  
F. Stoeckli ◽  
Y. Bauguil
Keyword(s):  
High Pressure ◽  
Activated Carbon ◽  
Carbon Fibre ◽  
Activated Carbons ◽  
Immersion Calorimetry ◽  
Initial Stage ◽  
A New Technique ◽  
Activated Carbon Fibre ◽  
And Calorimetry

The microporous structure of the activated carbon fibre KF1500 was investigated by applying a new technique as presented here. This was based on a combination of high-pressure CO2 adsorption measurements between 253 K and 353 K with direct measurement of the differential heats of adsorption at 298 K at low and medium coverages. The validity of this approach was tested by using two activated carbons which has been characterized previously by a variety of techniques, including immersion calorimetry. It appears that a combination of high-pressure adsorption and calorimetry with CO2 alone is a useful tool for the characterization of the whole range of microporosity. This approach confirms earlier observations, according to which the initial stage of adsorption by strongly activated carbons corresponds to adsorption on the walls of large micropores rather than to the primary filling of small micropores.

Use of nitrogen vs. carbon dioxide in the characterization of activated carbons

Langmuir ◽  
1987 ◽  
Vol 3 (1) ◽  
pp. 76-81 ◽  
Author(s):  
J. Garrido ◽  
A. Linares-Solano ◽  
J. M. Martin-Martinez ◽  
M. Molina-Sabio ◽  
Francisco. Rodriguez-Reinoso ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Activated Carbons

scholarly journals Effects of Gasifying Agents on the Characterization of Nut Shell-derived Activated Carbon

1995 ◽  
Vol 12 (3) ◽  
pp. 247-258 ◽  
Author(s):  
C. Nguyen ◽  
A. Ahmadpour ◽  
D.D. Do
Keyword(s):  
Carbon Dioxide ◽  
Activated Carbon ◽  
Activated Carbons ◽  
Benzene Adsorption ◽  
Surface Areas ◽  
Activating Agent ◽  
Micropore Size ◽  
Adsorptive Properties ◽  
Insight Into

Activated carbon was prepared from nut shells using a conventional two-stage method: carbonization followed by activation. Activation with steam or carbon dioxide as activating agent produced a range of chars of different burn-off. These were characterized for their total and micropore surface areas, and benzene adsorption capacity. Benzene adsorption measurement provided an insight into the effect of porosity development on the adsorptive properties of the adsorbent. It was found that activated carbon products from nut shells were comparable, in terms of adsorption characteristics, with activated carbons from other lignocellulosic precursors. The evolution of porosity of the resulting carbons shows that carbon dioxide is the preferable agent for the production of activated carbon with a narrow micropore size distribution.

scholarly journals Immersion Calorimetry for the Characterization of PD Catalysts Supported on Activated Carbon

2009 ◽  
Vol 6 (4) ◽  
pp. 1221-1227
Author(s):  
Liliana Giraldo ◽  
Juan Carlos Moreno-Piraján
Keyword(s):  
Hydrogen Peroxide ◽  
Activated Carbon ◽  
Functional Groups ◽  
Activated Carbons ◽  
The Other ◽  
Pd Catalysts ◽  
Immersion Calorimetry ◽  
Characterization Techniques ◽  
The Difference

Activated carbons obtained from coconut peel were oxidized using hydrogen peroxide. Superficial characteristics of these carbons were determined through N2and CO2isotherms and functional groups were characterized by TPD. Finally, the microcalorimetry technique was used in order to obtain the immersion enthalpies in diverse liquids and established the relation between them and the results obtained by the other characterization techniques. The results suggested that the immersion calorimetry allow establishing the difference between the supports and the catalysts.

scholarly journals Preparation and Characterization of Activated Carbon Monoliths with Potential Application as Phenol Adsorbents

2010 ◽  
Vol 7 (2) ◽  
pp. 531-539 ◽  
Author(s):  
Diana Paola Vargas-Delgadillo ◽  
Liliana Giraldo ◽  
Juan Carlos Moreno-Piraján
Keyword(s):  
Zinc Chloride ◽  
Activated Carbons ◽  
Chemical Activation ◽  
Micropore Volume ◽  
Immersion Calorimetry ◽  
Activated Carbon Monoliths ◽  
Coconut Shells ◽  
Characterization Of Activated Carbon ◽  
Scanning Electron

A series of different activated carbons of both honeycomb and disc type were prepared by chemical activation of coconut shells with zinc chloride at different concentrations, without the use of a binder. The structures were characterized by N2adsorption at 77 K and scanning electron microscopy (SEM), and also some samples were characterized by immersion calorimetry in benzene. These were subsequently used in the adsorption of phenol in aqueous solution. The experimental results indicat that activation with zinc chloride produced a large development of microporosity with a micropore volume of 0.38 to 0.79 cm3g-1, BET area between 725 and 1523 m2g-1and the capacity to adsorb phenol. In addition, the BET and Langmuir models were applied to isotherm data.

scholarly journals Characterization of the Surface of Activated Carbons Produced from Tire Residues

2010 ◽  
Vol 636-637 ◽  
pp. 1383-1388
Author(s):  
J.M. Valente Nabais ◽  
Carlos Laginhas ◽  
Peter J.M. Carrott ◽  
Manuela M.L. Ribeiro Carrott ◽  
Cristina Galacho ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Activated Carbon ◽  
Activated Carbons ◽  
Xrd Analysis ◽  
Point Of Zero Charge ◽  
Surface Functional Groups ◽  
Surface Characterisation ◽  
Environment Friendly ◽  
Carbon Production

The surface characterisation of new activated carbons produced from tire residues by activation with carbon dioxide was studied. The activated carbons produced were mainly basic with point of zero charge values above 8.8. The main surface functional groups identified by FTIR were ether, quinones, lactones, ketones, hydroxyls (free and phenol) and pyrones. The XRD analysis shows that the materials produced have a microstructural organisation with microcrystallite height around 1.5nm and width from 3 to 5.3nm. This analysis indicates also the possible presence of oxides (single or mixture) of the following heteroatoms: Fe, Al, Ca, Mg, Ti, Si, K, Pb, Cd, Ba, Zn and Sn. The results have shown the significant potential of this type of residues for activated carbon production. Furthermore, the environment friendly use of an industrial residue is also noteworthy.

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