Drift analysis of surface oxygen complexes on soot formed by metal oxides
- Delft Univ. of Technology (Netherlands)
At the Delft University of Technology a project concerning the catalytic removal of soot from diesel exhaust gases is being carried out. We are interested in a catalyst for the oxidation of soot particulates because: (i) diesel engines can no longer meet the requirements of the particulate (soot) emission standards, and (ii) collection of soot in a monolithic filter and simultaneous oxidation at diesel exhaust gas temperatures (600 K) is considered to be the best option to abate the emission of soot. The mechanism of catalytic oxidation reactions of carbonaceous materials has been the subject of many researchers over the last decades. Although it has been generally exepted that Surface Oxygen Complexes (S.O.C.) play an essential role in these reactions, their chemical nature, and interaction with catalysts and the oxidant (CO{sub 2}, H{sub 2}O or O{sub 2}) have hardly been reported. A powerful tool in analyzing carbonaceous materials is Fourier Transformed Infrared spectroscopy and in particular Diffuse Reflectance Infrared Fourier Transformed (DRIFT) spectroscopy. Several research groups have analyzed coal of several ranks using this technique e.g.. Also in situ studies regarding the oxidation of coal have been performed, as well as DRIFT studies on oxidized soot and PF chars. In this paper DRIFT analyses of partially converted soot by impregnated Fe-, Co-, Cr, K, and Ca-oxides (10 wt%) are presented, which validates a comparison of these analyses with literature data on catalyzed carbon and coal gasification.
- OSTI ID:
- 433124
- Report Number(s):
- CONF-960376-; ISSN 0569-3772; TRN: 97:000008-0045
- Journal Information:
- Preprints of Papers, American Chemical Society, Division of Fuel Chemistry, Vol. 41, Issue 1; Conference: Spring national meeting of the American Chemical Society (ACS), New Orleans, LA (United States), 24-28 Mar 1996; Other Information: PBD: 1996
- Country of Publication:
- United States
- Language:
- English
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