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Träfflista för sökning "LAR1:cth srt2:(1990-1999)"

Search: LAR1:cth > (1990-1999)

Result 21-30 of 5718

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Enumeration	Reference	Cover	Find
21.	Abu-Gharbieh, Rafeef, 1972 (author) Image analysis applied to spray characterization 1998 Reports (other academic/artistic)
22.	Abu-Gharbieh, Rafeef, 1972 (author) Laser sheet imaging and image analysis applied to spray diagnostics 1999 Licentiate thesis (other academic/artistic)
23.	Abu-Gharbieh, Rafeef, 1972, et al. (author) Review - Active Shape Models - Part II: Image Search and Classification 1998 In: Proceedings of the Swedish Symposium on Image Analysis (SSAB). Uppsala, Sweden. Conference paper (peer-reviewed)
24.	Abul Milh, Miroslawa, et al. (author) International field intercomparison of methods to speciate mercury in simulated flue gas 1999 In: Book of Abstract. 5th International Conference on Mercury as a Global Pollutant, Rio de Janeiro, Brazil, (1999). Conference paper (other academic/artistic)
25.	Acke, Filip, et al. (author) Activation energy of calcination by means of a temperature programmed reaction technique 1998 In: Thermochimica Acta. - 0040-6031. ; 306:1-2, s. 73-76 Journal article (peer-reviewed)abstract Calcination of limestone is considered to demonstrate the performance of a temperature programmed reaction technique to determine apparent activation energies for decomposition in the solid state. Influences of sample weight, particle size and sweep gas (He and Ar) are discussed, and connections are made to thermogravimetry studies in the literature.
26.	Acke, Filip, 1968, et al. (author) Comparison between ammonia and propene as the reducing agent in the selective catalytic reduction of NO under lean conditions over Pt black 1999 In: Applied Catalysis B: Environmental. - 0926-3373 .- 1873-3883. ; 20:2, s. 133-144 Journal article (peer-reviewed)abstract The catalytic activity of Pt black towards the reduction of NO under lean conditions is examined. Ammonia and propene are tested as reducing agents. A scrambling between nitrogens is observed in the formation of N2 and N2O for NH3. For C3H6, a reduction of NO to mainly N2O is found. A minor formation of N2 is only observed for high C3H6 concentrations. The role of NO2 as an intermediate in the reduction of NO is examined by using a feed gas mixture containing NO2, as well as by studying the catalytic activity of Pt black towards the NO-O2 and NO2-O2 reactions. No effect is observed in the maximum NOx conversion for C3H6 whereas for NH3 a decreased activity is found. The presented results are put in perspective of the reaction mechanisms proposed in the literature.
27.	Acke, Filip, 1968, et al. (author) Differences in reaction mechanisms for the selective reduction of NO under oxygen excess over Pt based catalysts using propane or propene as the reducing agent 1999 In: Applied Catalysis B: Environmental. - 0926-3373 .- 1873-3883. ; 22:1, s. L1-L3 Journal article (peer-reviewed)abstract The catalytic activity of Pt black towards the selective reduction of nitrogen oxides by propane under oxygen excess has been investigated and the results are put in perspective of reaction mechanisms as proposed in the literature. The absence of any NOx reduction provides further evidence for the active role of the Pt support in the selective reduction of nitrogen oxides by propane.
28.	Acke, Filip, et al. (author) Effects of O-2 on the reduction of NO over prereduced CaO surfaces: A mechanistic understanding 1999 In: Journal of Physical Chemistry B Materials. - 1089-5647. ; 110:12, s. 2195-2201 Journal article (peer-reviewed)abstract The effect of O-2 on the reduction of NO over prereduced CaO surfaces is investigated. The experimental results suggest the existence of at least three different reaction channels, of which two are related to the high-temperature reduction of the CaO surfaces and involve the use of extra electrons in breaking the NO bond. The third reaction channel does not employ extra electrons for bond breaking, but the activity is affected by the amount of adsorbed surface oxygens. The difference between the former two reaction channels is found in the temperature needed for an observable activity. The reaction channel which is already active at low temperatures is described by a model based on F-centers, whereas the one which needs elevated temperatures involves a hole transport through the bulk. The activation energy for this transport is determined experimentally using a temperature-programmed reaction technique as well as theoretically by means of ab initio quantum chemistry calculations. Room-temperature exposure to O-2 is suggested to result in a poisoning of the F-centers, but has only a minor effect on the reaction channel proposed for high temperatures. Effects on the reduction of NO of time as well as temperature for the O-2 exposure step are also investigated and found to be consistent with an understanding based on the coexistence of different reaction channels.
29.	Acke, Filip, 1968, et al. (author) Influence of the platinum-support interaction on the direct reduction of NOx under lean conditions 1998 In: Studies in Surface Science and Catalysis. - 0167-2991. ; 116, s. 285-294 Journal article (peer-reviewed)abstract Catalysts containing Pt supported on SiC, Al2O3 and ZSM-5 were prepared and studied for NOx reduction by C3H6 in Oz excess under transient (temperature ramps) and steady-state conditions. The maximum NOx reduction activity in the heating ramp experiments was similar for Pt/SiC and Pt/ZSM-5, while Pt/Al2O3 showed higher maximum activity. Both N-2 and N2O formation was observed for all catalysts, although the respective amounts varied with the investigated system. Highest Nz selectivity was observed for Pt/Al2O3. When the NOx reduction activity was studied under steady-state conditions the activity of Pt/Al2O3 decreased substantially (mainly due to a loss in N-2 production). Pt/ZSM-5 became somewhat more selective towards Na production whereas the activity and selectivity of Pt/SiC remained at about the same values as far the heating ramp experiments. Adsorbed species on the surface of the different catalysts were investigated using in-situ FTIR in order to obtain information about the reaction mechanisms. The adsorption of species on Pt/SiC was negligible, while a number of absorption bands were observed for Pt/Al2O3 (N and C containing species, and -NCO) and Pt/ZSM-5 (HC).
30.	Acke, Filip, 1968, et al. (author) Influence of the platinum-support interaction on the direct reduction of NOx under lean conditions 1997 In: 4th International Congress on Catalysis and Automotive Pollution Control (CAPoC4) in Brussels, Belgium, April 9-11, 1997. Conference paper (peer-reviewed)

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Type of publication: journal article (1772); conference paper (1390); licentiate thesis (856); doctoral thesis (839); reports (460); other publication (163); show more...; book chapter (132); book (70); editorial collection (28); research review (6); patent (2); show less...

Type of content: other academic/artistic (2907); peer-reviewed (2811)

Author/Editor: Wiberg, Nils-Erik, 1 ... (145); Nordén, Bengt, 1945 (139); Leckner, Bo G, 1936 (136); Engström, Tomas, 195 ... (97); Kildal, Per-Simon, 1 ... (89); Lennartson, Bengt, 1 ... (76); show more...; Svensson, Arne, 1955 (72); Skarnemark, Gunnar, ... (71); Berntsson, Thore, 19 ... (70); Medbo, Lars, 1957 (55); Bengtsson, Stefan, 1 ... (53); Panas, Itai, 1959 (51); Gadde, Lars-Erik, 19 ... (46); Gevorgian, Spartak, ... (43); Löfdahl, Lennart, 19 ... (43); Ottosson Gadd, Tony, ... (43); Stemme, Göran, 1958 (43); Skoglundh, Magnus, 1 ... (42); Sandberg, Ann-Sofie, ... (41); Åmand, Lars-Erik, 19 ... (41); Fabian, Martin, 1960 (40); Johansson, Mats, 195 ... (39); Vamling, Lennart, 19 ... (39); Runesson, Kenneth, 1 ... (38); Viberg, Mats, 1961 (38); Bohlin, Erik, 1961 (37); Karlsson, Magnus, 19 ... (37); Pedersen, Karsten, 1 ... (37); Woxenius, Johan, 196 ... (36); Jonson, Björn, 1941 (36); Karlsson, MariAnne, ... (36); Molander, Sverker, 1 ... (35); Johnsson, Filip, 196 ... (34); Larsson, Lars, 1945 (34); Sipus, Zvonimir, 196 ... (34); Nyman, Göran Hugo, 1 ... (33); Tittus, Michael, 196 ... (33); Nilsson, Thomas, 196 ... (32); Patriksson, Michael, ... (32); Samuelsson, Alf, 192 ... (32); Cederwall, Martin, 1 ... (31); Jacobsson, Per, 1958 (31); Hedelin, Per, 1948 (31); Riisager, K. (31); Jonsson, Dan, 1942 (31); Niklasson, Claes, 19 ... (30); Enoksson, Peter, 195 ... (30); Albinsson, Bo, 1963 (30); Kollberg, Erik, 1937 (30); Berbyuk, Viktor, 195 ... (30); show less...

University: Chalmers University of Technology (5718); University of Gothenburg (491); RISE (37); Jönköping University (25); Royal Institute of Technology (15); Lund University (12); show more...; Uppsala University (11); Luleå University of Technology (7); Karolinska Institutet (7); Linköping University (3); VTI - The Swedish National Road and Transport Research Institute (3); Halmstad University (2); Mid Sweden University (2); Linnaeus University (2); Blekinge Institute of Technology (2); Umeå University (1); Stockholm University (1); University West (1); University of Skövde (1); University of Borås (1); Karlstad University (1); Red Cross University College (1); show less...

Language: English (5344); Swedish (348); German (13); French (6); Russian (2); Undefined language (2); show more...; Norwegian (1); Spanish (1); Japanese (1); show less...

Research subject (UKÄ/SCB): Engineering and Technology (3219); Natural sciences (2558); Social Sciences (168); Medical and Health Sciences (99); Humanities (83); Agricultural Sciences (50)

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