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| 2. |
- AvilaCarino, J, et al.
(författare)
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B-CLL cells with unusual properties
- 1997
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Ingår i: International journal of cancer. - 0020-7136. ; 70, s. 1-
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Tidskriftsartikel (refereegranskat)
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| 3. |
- Blanco, J, et al.
(författare)
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Lean-DeNO(x) titania based monolithic catalysts
- 1998
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Ingår i: Catalysis Today. - 0920-5861. ; 45:1-4, s. 103-108
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Tidskriftsartikel (refereegranskat)abstract
- The activity of titania based copper and platinum monolithic catalysts in the reduction of nitrogen oxides was studied with exhaust gases from a Diesel engine injecting fuel as reductant. Combining both catalysts, a two-stage system was designed, studying the influence of the copper catalysts composition on its performance with synthetic gas mixtures. The influence of reactants concentration and operating conditions was also investigated. Taking into account these results, a double-bed system with a cell density of 33 cell cm(-2) (210 c.p.s.i.) was prepared. Linear velocity had a strong influence on the performance of the Pt catalyst and of the double-bed. Two NOx conversion maxima were observed with Pt/TiO2 at 225 degrees C and 350 degrees C operating at 6.6 m s(-1). Promising NOx conversions were achieved in the temperature range 200-450 degrees C. (C) 1998 Elsevier Science B.V. All rights reserved.
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| 4. |
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| 5. |
- Odenbrand, Ingemar, et al.
(författare)
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Lean NOx reduction in real diesel exhaust with copper and platinum titania based monolithic catalysts
- 1999
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Ingår i: Applied Catalysis B: Environmental. - 0926-3373. ; 23:1, s. 37-44
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Tidskriftsartikel (refereegranskat)abstract
- A study on the catalytic behaviour of a copper and a platinum titania based monolithic catalyst in the reduction of nitrogen oxides with hydrocarbons in real diesel conditions was carried out. A Volvo TD 7.31 engine was used as gas source, and diesel fuel was the reductant. In these conditions, both catalysts were active in the reduction reaction. The influence of various operating parameters on the catalytic activity, as engine speed and reductant concentration in the gas has studied. Other aspects were also studied as selectivity of reduction to nitrous oxide, nitrogen monoxide oxidation into nitrogen dioxide, and generation of carbon monoxide. The selectivity in the reduction of NO to N2O with the diesel exhaust was relatively low with both titania supported systems. Opposite behaviours of both catalysts in NO to NO2 oxidation were observed, indicating two different mechanisms for this reaction. (C) 1999 Elsevier Science B.V. All rights reserved.
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