Ammonia adsorption on activated carbon

Authors

  • Miguel A. Autie Pérez Centro Nacional de Investigaciones Científicas
  • Mercedes Fernández García Universidad de la Habana
  • Marisol Carrera Glacial Centro Nacional de Investigaciones Científicas

Abstract

Ammonia adsorption on activated carbon was studied. These carbon was obtained from coconut shell carbonaceous precursor, activated at higher temperature gasification with a mixture of H2O and air (Physical activation). In order to study the thermal effect over carbon porosity the solid was outgassed at different temperatures. Micropores Volume Filling Theory of Dubinin and Dubinin-Steokli equation were used to study the porosity of adsorbent and pore sizes determination respectively. It was found that ammonia was physically adsorbed, and only a little quantity of ammonia remained chemically adsorbed when carbon was a second time outgassed at 300 K after it was outgased at 423 K . It was found that in the range of experimental pressure analyzed the adsorbent showed, respect to ammonia adsorption, one heterogeneous porous structure which was formed by two homogeneous porous structures. Ammonia adsorption was fitted with one Dubinin-Radushkievich equation of two terms. The first term described the adsorption in the pores with lower radius and the second one described the adsorption in the pores with higher radius. The ammonia adsorption in the pores of higher radius was fited with BET model which allowed the determination of specific surface.

Published

2022-06-01

How to Cite

Autie Pérez, M. A. ., Fernández García, M. ., & Carrera Glacial, M. . (2022). Ammonia adsorption on activated carbon. NATIONAL CENTER FOR SCIENTIFIC RESEARCH (CENIC) CHEMICAL SCIENCES JOURNAL, 32(3), 149-152. Retrieved from https://revista.cnic.cu/index.php/RevQuim/article/view/1667

Issue

Section

Research articles