Using granular activated carbon prepared from oil palm shell by ZnCl2 and physical activation for methane adsorption
Document Type
Article
Publication Date
1-1-2010
Abstract
Granular activated carbons for methane adsorption have been prepared by impregnation of oil palm shell with various solutions of ZnCl2 followed by heat treatment at 500 degrees C under a flow of nitrogen. For this precursor, large micropore volume of micropores (with a very small volume of mesopores and macropores) was obtained with intermediate ZnCl2 mass ratio. Methane capacity at 800 mmHg was in the range of 10-12 cm(3)/g. All the samples were further activated by reaction under a flow of carbon dioxide. Although such activation resulted in a decrease in the BET surface area, average pore width, micropore and pore volume (except very low impregnation ratio, X-Zn = 0.15 g/g), however, there was a 100% net increase in the methane capacity. (c) 2010 Elsevier B.V. All rights reserved.
Keywords
Palm shell, Activated carbon, Chemical and physical activation, Pore size distribution, Methane adsorption
Publication Title
Journal of Analytical and Applied Pyrolysis
Volume
89
Issue
2
Publisher
Elsevier
Publisher Location
PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS