Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
ACTIVATION TIME EFFECT ON ACTIVATED CARBON FROM COCONUT SHELL TO ENHANCE CO2 ADSORPTION
Submission Author:
Wendell Galdino , PE
Co-Authors:
Wendell Galdino, Jean Silva, Diogo Santos, Alexandre Freire Bezerra, Adriano Sitônio Rumão, Emerson Jaguaribe
Presenter: Wendell Galdino
doi://10.26678/ABCM.COBEM2017.COB17-1340
Abstract
This work discusses the adsorption evaluation of carbon dioxide, CO2, on physically activated carbons, from coconut shell (Cocos Nucifera, L.). The maximum temperature used in the rotary electric kiln during the whole thermal processes was 950 ºC, the heating rate being 10 °C.min-1. Two residence times were used for the activation: 25 min and 50 min. The physicochemical characteristics of the adsorbents produced were obtained from scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and surface area determination (BET, micropore surface area and pore size). The adsorption tests were carried out at a constant temperature of 27 ° C for 120 min, using a CO2 flow rate of 50 mL.min-1. With regard to the activation time, it was noticed that the adsorptive capacity of the carbons on CO2 removal, is directly proportional to its magnitude. For example, the interval of 50 min provided a CO2 removal 8.0% larger than that achieved with 25 min. Two other factors directly correlated with the increasing of CO2 adsorption capacity were noticed: the existence of functional groups and the extension of the micropores area.
Keywords
Adsorption, activated carbon, coconut shell, Carbon dioxide
