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The influence of demineralisation and ammoxidation on the adsorption properties of an activated carbon prepared from a Polish lignite |
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| Authors: | Julien Starck Sebastien Muller Guy Furdin Cathie Vix_Guterl Pierre Faure |
| Affiliation: | a Laboratoire de Chimie et Applications, Université Paul Verlaine-Metz, UFR de Sciences, 1 Bd Arago, technopôle 2000, 57078 Metz cedex 03, France b Institute of Organic Chemistry, Polish Academy of Sciences, ul. Kasprzaka 44/52, 01-224 Warszawa, Poland c LCSM, CNRS UMR 7555, université Henry Poincaré, 54500 Vandoeuvre les Nancy, France d Institut de Chimie de Chimie des Surfaces et Interfaces (ICSI), UPR CNRS 9069, 15 rue Jean Starcky, BP 2488, 68057 Mulhouse cedex, France e LMSPC - ECPM - R3 1er étage, 25 rue Becquerel, 67087 Strasbourg cedex 2, France f G2R, UMR 7566, Université Henri Poincaré, BP 239, 54506 Vandoeuvre-lès-Nancy, France |
| Abstract: | The preparation of cheap nitrogen-enriched materials with large adsorptive capacities and selectivity towards volatile organic compounds remains a challenge. Ammoxidation has been used to prepare nitrogen-enriched activated carbons using a demineralised Polish lignite. The lignite samples were demineralised by two different methods before nitrogen-enrichment by ammoxidation and physical activation in steam. The surface chemistry was investigated by elemental analysis, Boehm titration, infrared and XPS spectroscopies and adsorptive properties by a linear solvation energy relationship approach. Results show a quasi-total demineralisation and a higher reactivity towards nitrogen for the demineralised samples. The BET surface is also higher than for the non-demineralised lignite. Active carbons previously ammoxidated and demineralised are more interesting in terms of selective removal of gaseous pollutants. |
| Keywords: | Activated carbons Chemical treatment Infrared spectroscopy X-ray photoelectron spectroscopy Adsorption properties |
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