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Textural Characterization and Energetics of Porous Solids by Adsorption Calorimetry

Author

Listed:
  • Vanessa Silenia Garcia-Cuello

    (Department of Chemistry, Faculty of Science, National University of Colombia, Bogota, Colombia)

  • Liliana Giraldo

    (Department of Chemistry, Faculty of Science, National University of Colombia, Bogota, Colombia)

  • Juan C. Moreno-Pirajan

    (Research Group on Porous Solids and Calorimetry, Department of Chemistry, Faculty of Science, University of the Andes, Bogota, Colombia)

Abstract

An adsorption microcalorimeter was designed and built in our laboratory and used for the determination of differential adsorption heats in different samples of porous solids: activated carbon granules, activated carbon pellets, an activated carbon monolith and a zeolite sample. This work shows the relationship between adsorption heat and the pore size of different porous solids using adsorption of NH 3 , CO and N 2 O. The result shows that the thermal effect can be related with textural properties and superficial chemical groups of the studied porous solids. The values of differential heats of N 2 O adsorption in the investigated systems have shown that this interaction is weaker than that with CO. Small amounts of N 2 O are chemisorbed in the investigated systems. For the room temperature adsorption of N 2 O, the strongest active sites for the interaction with Brönsted acid groups in the ACM structure were identified. The values determined are between −60 kJ/mol and −110 kJ/mol for ZMOR and ACM, respectively, for the adsorption of N 2 O and −95 kJ/mol and −130 kJ/mol for the adsorption of CO.

Suggested Citation

  • Vanessa Silenia Garcia-Cuello & Liliana Giraldo & Juan C. Moreno-Pirajan, 2011. "Textural Characterization and Energetics of Porous Solids by Adsorption Calorimetry," Energies, MDPI, vol. 4(6), pages 1-20, June.
    • Handle: RePEc:gam:jeners:v:4:y:2011:i:6:p:928-947:d:12725
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    Cited by:

    1. Béchir Wanassi & Ichrak Ben Hariz & Camélia Matei Ghimbeu & Cyril Vaulot & Mejdi Jeguirim, 2017. "Green Carbon Composite-Derived Polymer Resin and Waste Cotton Fibers for the Removal of Alizarin Red S Dye," Energies, MDPI, vol. 10(9), pages 1-17, September.
    2. Xiang Gou & Chunfei Wu & Kai Zhang & Guoyou Xu & Meng Si & Yating Wang & Enyu Wang & Liansheng Liu & Jinxiang Wu, 2015. "Low Temperature Performance of Selective Catalytic Reduction of NO with NH 3 under a Concentrated CO 2 Atmosphere," Energies, MDPI, vol. 8(11), pages 1-11, October.

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