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

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 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 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.

Production and characterization of activated carbons from neem bark (Azadirachta indica)

2021 ◽  
Author(s):  
C. E. Ouedraogo ◽  
K. N. Aboua ◽  
D. B. Soro ◽  
M. Diarra ◽  
L. Meité ◽  
...  
Keyword(s):  
Azadirachta Indica ◽  
Activated Carbons

Polypropylene Fibre Reinforced Concrete Air Permeability

1990 ◽  
Vol 211 ◽  
Author(s):  
Miguel A. Sanjuan ◽  
A. Moragues ◽  
B. Bacle ◽  
C. Andrade
Keyword(s):  
Carbon Dioxide ◽  
Reinforced Concrete ◽  
Steel Corrosion ◽  
Air Permeability ◽  
Polypropylene Fibre ◽  
Fibre Reinforced Concrete ◽  
Polypropylene Fibres ◽  
Cement Ratio ◽  
Reinforcing Steel Corrosion

AbstractThe permeability of concrete to gases is of direct importance to the durability of concrete structures, because of carbon dioxide flowing through the concrete favour lime carbonation and reinforcing steel corrosion.Mortar with and without polypropylene fibres having water/cementitious ratios of 0.30, 0.35 and 0.40 and a cement/sand ratio of 1/1 were studied. Polypropylene dosage varied from 0.1 to 0.3% by volume of cement.The characterization of mortar permeability was made using cylindrical shaped samples (3 cm height and 15 cm diameter). These specimens were 28 days cured and then dried before the test.The addition of fibres results in a decrease of air permeability. Variation of the water/cement ratio is of lesser importance than fiber addition.

Synthesis and Characterization of a Composite Zeolite-Metglas Carbon Dioxide Sensor

2005 ◽  
Vol 15 (7) ◽  
pp. 1165-1170 ◽  
Author(s):  
I. G. Giannakopoulos ◽  
D. Kouzoudis ◽  
C. A. Grimes ◽  
V. Nikolakis
Keyword(s):  
Carbon Dioxide ◽  
Synthesis And Characterization ◽  
Carbon Dioxide Sensor
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