期刊
THERMOCHIMICA ACTA
卷 499, 期 1-2, 页码 21-26出版社
ELSEVIER
DOI: 10.1016/j.tca.2009.10.016
关键词
Soot combustion; Silica; Zirconia; Lithium nitrate
资金
- UNSL(Universidad Nacional de San Luis)
- UNLP (Universidad Nacional de La Plata)
- CONICET
- ANpCYT
- Junta de Andalucia Proyecto de Excelencia [P06-FQM-01661]
New catalysts for soot combustion were prepared by impregnation of different supports (SiO2, ZrO2 and ZrO2 center dot nH(2)O) with a LiNO3 solution and then characterized by means of FTIR, XPS, TGA and UV-vis spectroscopy, whereby the presence of lithium nitrate in the prepared catalysts was identified and quantified. The soot combustion rate using this series of catalysts (LiNO3/support) was compared with the activity of a series of impregnated catalysts prepared using LiOH (Li2O/supports). Catalysts prepared using LiNO3 are found to be more active than those prepared using LiOH. The catalytic performance was also studied with a NO/O-2 mixture in the feed, demonstrating that NO increases the combustion rate of soot, probably as a consequence of lithium oxide forming an in situ nitrate ion. (C) 2009 Elsevier B.V. All rights reserved.
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