Insight into hydroxides-activated coals: chemical or physical activation?
Please use this identifier to cite or link to this item:
|Title:||Insight into hydroxides-activated coals: chemical or physical activation?|
|Authors:||Alcañiz-Monge, Juan | Illán-Gómez, María José|
|Research Group/s:||Materiales Carbonosos y Medioambiente|
|Center, Department or Service:||Universidad de Alicante. Departamento de Química Inorgánica|
|Keywords:||Activated carbon | Chemical activation | Thermal analysis | Microporosity|
|Knowledge Area:||Química Inorgánica|
|Citation:||ALCAÑIZ MONGE, Juan; ILLÁN GÓMEZ, María José. "Insight into hydroxides-activated coals: chemical or physical activation?". Journal of Colloid and Interface Science. Vol. 318, Issue 1 (1 Febr. 2008). ISSN 0021-9797, pp. 35-41|
|Abstract:||The objective of this paper is to get an insight into the chemical activation mechanism using KOH and NaOH as activated agents. Three coals have been selected as carbon precursors. It was found that KOH and NaOH develop a similar narrow microporosity, independently of the coal rank, whereas only KOH generates supermicroporosity. Temperature-programmed desorption experiments, carried out with impregnated anthracite, show differences on the gas evolved during the activated carbon preparation using the two activating agents. Thus, whereas hydrogen profiles are quite similar for both activated agents, the CO and H2O profiles are different. It is remarkable the high amount of H2O evolved at the maximum treatment temperature for both activating agents. The results obtained allow concluding that the chemical activation is due to a combination of different process driving the development of material porosity.|
|Sponsor:||Spanish Government (project CTQ-2005-01358) and the GV (projects GV/2007/144 and ARVIV/2007/067).|
|Appears in Collections:||INV - MCMA - Artículos de Revistas|
Files in This Item:
Items in RUA are protected by copyright, with all rights reserved, unless otherwise indicated.