Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników
2015 | 13 | 1 |
Tytuł artykułu

Calorimetric study of activated carbons impregnated with CaCl2

Treść / Zawartość
Warianty tytułu
Języki publikacji
Activated carbon monoliths with different surface characteristics were prepared by impregnating oil palm stone with diluted aqueous CaCl2 solutions (with concentrations between 2 and 7% w/v) without binders. The solids were characterized by determination of nitrogen adsorption isotherms at 77 K and carbon dioxide adsorption isotherms at 273 K using volumetric adsorption equipment. Surface area and micropore volume values were calculated from the nitrogen isotherms using the BET and DR models, respectively, obtaining solids with low percentages of mesoporosity. Immersion enthalpies of the activated carbon monoliths were determined in benzene, with values between -173 and -104 J g-1, and water, with values between 61 and 30 J g-1, indicating that the monoliths have a hydrophobic character.

Opis fizyczny
  • Departamento de Química.
    Facultad de Ciencias. Universidad Nacional de Colombia. Avenida
    Carrera 30 No. 45-03. Bogotá
  • Departamento de Química.
    Facultad de Ciencias. Universidad Nacional de Colombia. Avenida
    Carrera 30 No. 45-03. Bogotá
  • Departamento de Química.
    Facultad de Ciencias. Universidad Nacional de Colombia. Avenida
    Carrera 30 No. 45-03. Bogotá
  • [1] Wang, Z.T.; Fu, Z.K; Zhang, B.; Wang, G.X.; Rudolph, V.; Huo, L.Adsorption and desorption on coals for CO2 sequestration. MinSci Technol, 2009, 19, 8-13
  • [2] Drage, T.C.; Kozynchenko, O.; Pevida, C.; Plaza, M.G.; Rubiera, F.;Pis, J.J.; Snape, C.E.; Tennison S. Developing activated carbonadsorbents for pre-combustion CO2 capture. Energy Procedia,2009, 1, 599-605
  • [3] González, J.C.; González, M.T.; Molina-Sabio, M; Rodríguez-Reinoso, F; Sepúlveda, A. Porosity of activated carbonsprepared from different lignocellulosic materials. Carbon, 1995,33, 1175-1177
  • [4] Zhou, L.; Liu, X.; Li, J.; Wang, N.; Wang, Z.; Zhou, Y. Synthesis ofordered mesoporous carbon molecular sieve and its adsorptioncapacity for H2, N2, O2, CH4 and CO2. Chem. Phys. Lett., 2005,413, 6-9
  • [5] Alcañiz-Monge, J.; Marco-Lozar, J.P.; Lillo-Ródenas, M.A. CO2separation by carbon molecular sieve monoliths prepared fromnitrated coal tar pitch. Fuel Process Technol., 2011, 92, 915-919[WoS]
  • [6] Mohan, D.; Singh, K.P.; Vinod, K. Wastewater treatment usinglow cost activated carbons derived from agricultural byproducts.J. Hazard Mat., 2008, 152, 1045-1053
  • [7] Giraldo, L.; Moreno-Piraján, J.C. Synthesis of Activated CarbonHoneycomb Monoliths under Different Conditions for theAdsorption of Methane. Adsorption Science & Technology,2009, 27, 255-265[WoS][Crossref]
  • [8] Rodriguez Reinoso, F.; Almansa, C.; Molina, Sabio M. Adsorptionof methane into ZnCl2 activated carbon derived disc. MicroporMesopor Mat., 2004, 76, 185-191
  • [9] Vargas, D.P.; Giraldo, L.; Silvestre-Albero, J.; Moreno-Piraján,J.C. CO2 adsorption on binderless activated carbon monoliths.Adsorption, 2011, 17, 497-504[Crossref][WoS]
  • [10] Vargas, D.P.; Giraldo, L.; Ladino, Y.; Moreno, J.C. Síntesis ycaracterización de monolitos de carbón activado utilizandocomo precursor cáscara de coco. Afinidad, 2009, 66, 38-43
  • [11] Juárez-Galán, J.M.; Silvestre-Albero, A.; Silvestre-Albero, J.;Rodríguez-Reinoso, F. Synthesis of activated carbon with highlydeveloped ‘‘mesoporosity”. Micropor Mesopor Mat., 2009, 117,519–521[WoS]
  • [12] Nakagawa, Y.; Molina-Sabio, M.; Rodríguez Reinoso, F.Modification of the porous structure along the preparation ofactivated carbon monoliths with H3PO4 and ZnCl2. MicroporMesopor Mat., 2007,103, 29-34[WoS]
  • [13] Martín, M.J. Adsorción física de gases y vapores por carbones.Alicante, Universidad de Alicante (Publicaciones) 1988
  • [14] Moreno-Piraján, J.C.; Giraldo, L.; Vargas, D.P. Determination ofEnergy Characteristic and Microporous Volume by ImmersionCalorimetry in Carbon Monoliths. E-Journal of Chemistry, 2012,9, 650-658
  • [15] Sing, K. S. W.; Everett, D. H.; Haul, R.A.W.; Moscou, L.; Pierotti, R. A.;Rouquerol, J.; Siemieniewska, T. (Reporting physisorptiondata for gas/solid systems with Special Reference to theDetermination of Surface Area and Porosity. Pure & AppliedChemistry, 1985, 57, 603-619
  • [16] Rios, R.V.; Silvestre-Albero, J.; Sepulveda-Escribano, A.; Molina-Sabio, M.; Rodríguez-Reinoso, F. Kinetic Restrictions in theCharacterization of Narrow Microporosity in Carbon Materials.J. Phys. Letters, 2007, 111, 3803-3805
  • [17] Zuo, S.; Yang, J.; Liu, J.; Cai, X. Significance of the carbonizationof volatile pyrolytic products on the properties of activatedcarbons from phosphoric acid activation of lignocellulosicmaterial. Fuel Process Technol, 2009, 90, 994-1001[WoS]
  • [18] Stoeckli, F.; Centeno, T.A. On the determination of surface areasin activated carbons. Carbon, 2005, 43, 1184-1190
  • [19] Giraldo, L.; Moreno-Pirajan, J.C. Calorimetric determination ofactivated carbons in aqueous solutions. J. Therm. Anal. Cal.,2007, 89, 589-594
  • [20] Denoyel, R.; Fernandez-Colinas, J.; Grillet, Y.; Rouquerol, J.Assessment of the surface area and microporosity of activatedcharcoals from immersion calorimetry and nitrogen adsorptiondata. Langmuir, 1993, 9, 515-518[Crossref]
  • [21] Giraldo, L.; Moreno, J.C. Determination of the ImmersionEnthalpy of activated carbon by Microcalorimetry of the HeatConduction. Instrum Sci Technol., 2000, 28, 171-178 [Crossref]
Typ dokumentu
Identyfikator YADDA
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.