Готові списки джерел за темами / Alkenes and Dienes

Добірка наукової літератури з теми "Alkenes and Dienes"

Автор: Grafiati
Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Alkenes and Dienes"

1

Dobrovolná, Zuzana, and Libor Červený. "Competitive Hydrogenation of Unsaturated Hydrocarbons by Hydrogen Transfer from Ammonium Formateon a Palladium Catalyst." Collection of Czechoslovak Chemical Communications 62, no. 9 (1997): 1497–502. http://dx.doi.org/10.1135/cccc19971497.

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Competitive hydrogenation of alkenes (cyclohexene, hex-1-ene, hept-1-ene, oct-1-ene) and dienes (octa-1,7-diene, cyclohexa-1,3-diene) was carried out by catalytic hydrogen transfer from ammonium formate on palladium in methanol. The adsorptivity and reactivity of the hydrocarbons decreased in the series: cyclic diene > linear diene > linear 1-alkene > cyclic alkene.
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2

Madden, Katrina S., Sylvain David, Jonathan P. Knowles, and Andrew Whiting. "Heck–Mizoroki coupling of vinyliodide and applications in the synthesis of dienes and trienes." Chemical Communications 51, no. 57 (2015): 11409–12. http://dx.doi.org/10.1039/c5cc03273c.

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Vinyliodide reacts chemoselectively under Heck–Mizoroki conditions with terminal alkenes to give diene products, including vinyl boronate esters, and the resulting dienylboronate undergoes Suzuki–Miyaura coupling with aryl, heteroaryl and alkenyl halides to access dienes and trienes.
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3

Mantrand, Nathalie, and Philippe Renaud. "Azidosulfonylation of alkenes, dienes, and enynes." Tetrahedron 64, no. 52 (December 2008): 11860–64. http://dx.doi.org/10.1016/j.tet.2008.09.096.

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4

Tsuno, Takashi. "ChemInform Abstract: Alkenes, Alkynes, Dienes, Polyenes." ChemInform 42, no. 38 (August 25, 2011): no. http://dx.doi.org/10.1002/chin.201138251.

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5

Hussein, Aqeel A. "Ru-catalysed oxidative cyclisation of 1,5-dienes: an unprecedented role for the co-oxidant." RSC Advances 10, no. 26 (2020): 15228–38. http://dx.doi.org/10.1039/d0ra02303e.

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The Ru-mediated oxidative cyclisation of 1,5-dienes to THF-diols proceeds with the intermediacy of NaIO4-complexed Ru(vi) species and offers new insights into the Ru-catalysed functionalizations of alkenes and 1,5-dienes.
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6

Gong, Liu-Zhu, Pu-Sheng Wang, and Meng-Lan Shen. "Transition-Metal-Catalyzed Asymmetric Allylation of Carbonyl Compounds with Unsaturated Hydrocarbons." Synthesis 50, no. 05 (December 21, 2017): 956–67. http://dx.doi.org/10.1055/s-0036-1590986.

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The asymmetric allylation of carbonyl compounds is an important process for the formation of carbon–carbon bonds, generating optically active homoallylic alcohols that are versatile building blocks with widespread applications in organic synthesis. The use of readily available unsaturated hydrocarbons as allylating reagents in the transition-metal-catalyzed asymmetric allylation has received increasing interest as either a step- or an atom-economy alternative. This review summarizes transition-metal-catalyzed enantioselective allylations on the basis of the ‘indirect’ and ‘direct’ use of simple unsaturated hydrocarbons (include dienes, allenes, alkynes, and alkenes) as allylating reagents, with emphasis on highlighting conceptually novel reactions.1 Introduction2 ‘Indirect’ Use of Unsaturated Hydrocarbons in Asymmetric Allylation of Carbonyl Compounds2.1 Enantioselective Allylation with 1,3-Dienes2.2 Enantioselective Allylation with Allenes2.3 Enantioselective Allylation with Alkenes3 ‘Direct’ Use of Unsaturated Hydrocarbons in Asymmetric Allylation of Carbonyl Compounds3.1 Enantioselective Allylation with 1,3-Dienes3.2 Enantioselective Allylation with Allenes3.3 Enantioselective Allylation with Alkynes3.4 Enantioselective Allylation with Alkenes4 Conclusions
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7

Welker, Mark E. "Boron and Silicon-Substituted 1,3-Dienes and Dienophiles and Their Use in Diels-Alder Reactions." Molecules 25, no. 16 (August 16, 2020): 3740. http://dx.doi.org/10.3390/molecules25163740.

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Boron and silicon-substituted 1,3-dienes and boron and silicon-substituted alkenes and alkynes have been known for years and the last 10 years have seen a number of new reports of their preparation and use in Diels-Alder reactions. This review first covers boron-substituted dienes and dienophiles and then moves on to discuss silicon-substituted dienes and dienophiles.
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8

González-Rodríguez, Carlos, and Michael C. Willis. "Rhodium-catalyzed enantioselective intermolecular hydroacylation reactions." Pure and Applied Chemistry 83, no. 3 (January 31, 2011): 577–85. http://dx.doi.org/10.1351/pac-con-10-09-23.

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Rhodium-catalyzed enantioselective hydroacylation reactions allow rapid access to chiral substituted ketones. However, due to the low reactivity of disubstituted alkenes in intermolecular versions of this process, only a small number of asymmetric intermolecular reactions have been described. Strategies employed to avoid reactivity issues include the use of norbornadienes, linear dienes, acrylamides, and allenes as the alkene components. In addition, our laboratory has recently reported the rhodium-catalyzed enantioselective inter-molecular alkyne hydroacylation reaction, leading to the formation of enone products via a kinetic resolution procedure.
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9

Trifonov, A. A., I. V. Basalov, and A. A. Kissel. "Use of organolanthanides in the catalytic intermolecular hydrophosphination and hydroamination of multiple C–C bonds." Dalton Transactions 45, no. 48 (2016): 19172–93. http://dx.doi.org/10.1039/c6dt03913h.

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10

Maeda, Hajime, Hiroshi Takayama, and Masahito Segi. "Photoinduced three-component coupling reactions of electron deficient alkenes, dienes and active methylene compounds." Photochemical & Photobiological Sciences 17, no. 8 (2018): 1118–26. http://dx.doi.org/10.1039/c8pp00239h.

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Дисертації з теми "Alkenes and Dienes"

1

Bloom, Andrew Jonathan. "Chemical and electrochemical nitrations of alkenes and dienes." Thesis, University of Southampton, 1986. https://eprints.soton.ac.uk/365569/.

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2

Smith, Dennis. "Gas phase epoxidation of alkenes." Thesis, University of York, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323493.

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3

Cui, Xiuhua. "Asymmetric hydrogenations of aryl alkenes using imidazol-2-ylidene iridium complexes." Texas A&M University, 2005. http://hdl.handle.net/1969.1/2456.

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A library of iridium complexes featuring oxazoline and imidazol-2-ylidene ligands were synthesized by reaction of a library of imidazoles with a second library of oxazoline iodides. These complexes were active catalysts for hydrogenations of aryl substituted monoenes. Tri- and 1,1-disubstituted alkenes were hydrogenated quantitatively with ee??s up to 99% at 1 atm hydrogen pressure. Catalyst, substrate, temperature and pressure effects were studied. The iridium complexes were also used for the kinetic study of hydrogenation of 2,3- diphenylbutadiene. This hydrogenation is a stepwise reaction: one double bond was hydrogenated first, then the second one. Both step hydrogenations were zero order in alkene. The consumption of 2,3-diphenylbutadiene was first order in catalyst, and probably first order in hydrogen pressure too. The enantioselectivity for the first step hydrogenation was low. There were match and mismatch catalyst-substrate relationships for the second step hydrogenation, and the enantioselectivities for this step were catalyst controlled. NMR studies indicated that the initiation of the reaction involved both hydrogen and alkene substrate. A competitive experiment was designed to explore the formation of meso-alkane at first step hydrogenation, and the results indicated that the alkane was formed predominantly via an associative mechanism. Four types of conjugate dienes were synthesized and hydrogenated. Different reactivities and selectivities were obtained for each type of dienes. In the best case, a diene was hydrogenated quantitatively with an excellent ent/meso ratio of 20:1.0 and 99% enantioselectivity. The scope, limitation and potential applications of the reactions were discussed. A selection of the dienes was hydrogenated with the Crabtree??s catalyst, for comparison, and the yields, conversions and diastereoselectivities were inferior to those from iridium-oxazoline-imidazol-2-ylidene catalysts.
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4

Keily, John Fraser. "Part A: [2+2] cycloadditions of keteniminium salts with resin bound alkenes : Part B: Permanganate oxidations of 1,5-dienes." Thesis, University of Southampton, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271633.

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5

Chan, Mary S. W. "Factors influencing the regiochemistry of nucleophilic addition to the radical cation of alkenes and dienes studied in the context of the photochemical nucleophile-olefin combination, aromatic substitution (photo-NOCAS) reaction." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ36574.pdf.

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6

Tyler-Mahon, Amanda Rhian. "The effect of alkene substitution in the palladium catalysed cycloisomerisation of dienes." Thesis, University of Bristol, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.413611.

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7

Ghidu, Victor P. "Cationic cyclizations of iron tricarbonyl diene complexes with pendant alkenes and arenes." online version, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=case1100725837.

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8

Dion, Isabelle. "Intramolecular Cope-Type Hydroamination of Alkenes in the Synthesis of Alkaloids: Total Synthesis of (±)-Coniine and (±)-Desbromoarborescidine A and Studies on a Novel Amination Strategy Towards Manzamine A." Thesis, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23059.

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Intramolecular hydroamination represents a potentially general, simple strategy to access various nitrogen heterocycles. While important progress has been accomplished in recent years, six-membered ring formation via alkene hydroamination is typically difficult and limited to terminal alkenes, suggesting that only 2-methylpiperidines can be accessed reliably with current methods. As part of the Beauchemin group efforts on metal-free concerted hydroamination methods, the first part of this thesis describes the development of a Cope-type hydroamination-Meisenheimer rearrangement (CHMR) sequence that is applicable in inter- and intramolecular reactions. Data acquired from optimization on a difficult substrate (coniine) and the successful application of the CHMR sequence to the syntheses of N-norreticuline and 10-desbromoarborescidine are reported. The amination of alkenes is surprisingly scarcely used in the synthesis of complex alkaloids despite its potential for the construction of structurally challenging molecules while avoiding functional group interconversions. Hence, the second part of this thesis describes the studies on a novel amination sequence, consisting of an intermolecular Diels-Alder followed by an intramolecular hydroamination reaction, in the efforts towards the synthesis of biologically active and structurally complex Manzamine A. As such, the synthesis of the model substrates, including the development of a novel family of aminodienes, as well as the assessment of their reactivity towards [4+2] cycloadditions is reported.
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9

Kouklovsky, Cyrille. "Alkenyl-2 oxazolines, nouveaux diénophiles très efficaces dans la réaction de Diels-Alder asymétrique." Paris 11, 1989. http://www.theses.fr/1989PA112317.

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2-Alkenyl oxazolines activated with trifluoroacetic anhydride proved to be very powerful dienophiles towards various dienes including Danishefsky type dienes in the asymmetric Diels-Alder reaction. The reactions were perfonned generally between -100°C and -20°C and the diastereoselectivity is usually better than 90%. The synthesis of two isomerie amino hydroxy bomanes using for one of them an original scheme is first described. The preparation of 2-alkenyl oxazolines by an original route is presented afterwards. In the following chapter, various Diels-Alder cycloadditions with a number of fonctionnalised and unfonctionnalised dienes are described. Less stereoselective cycloadditions were obtained with isomerie oxazoline. This is in accordance with the initial hypothesis deduced from examination of the molecular models. Finally, a new method wich allowed a smooth hydrolysis of the oxazoline ring has been studied in the last chapter. In conclusion, this work described a very efficient use of 2-alkenyl oxazolines in the Diels-Alder reaction
Les alkényl-2 oxazolines activées par l'anhydride trifluoroacétique se sont révélées des diénophiles très réactifs dans les cycloadditions de Diels-Aider asymétrique vis-à-vis de nombreux diènes, y compris les diènes de type Danishefsky. Les réactions sont effectuées généralement entre -100°C et -20°C et la diastéréosélectivité est habituellement supérieure à 90%. La synthèse des deux amino hydroxy bornanes isomères, en utilisant pour l'un d'entre eux un schéma original est d'abord décrit. La préparation d'alkenyl-2 oxazolines utilisant une nouvelle méthode de synthèse est ensuite décrite dans le chapitre suivant. Diverses réactions de cycloaddition sont ensuite étudiées en utilisant des diènes fonctionnalisés ou non fonctionnalisés. Une moins bonne stéréosélectivité est obtenue avec l'oxazoline isomère, ce qui corrobore l'hypothèse déduite de l'examen des modèles moléculaires. Finalement, une nouvelle méthode d'hydrolyse douce et non isomérisante est présentée dans le dernier chapitre. En conclusion, ce travail décrit une nouvelle réaction de Diels-Alder asymétrique particulièrement efficace
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10

Obrecht, Lorenz. "Artificial metalloenzymes in catalysis." Thesis, University of St Andrews, 2015. http://hdl.handle.net/10023/7248.

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This thesis describes the synthesis, characterisation and application of artificial metalloenzymes as catalysts. The focus was on two mutants of SCP-2L (SCP-2L A100C and SCP-2L V83C) both of which possess a hydrophobic tunnel in which apolar substrates can accumulate. The crystal structure of SCP-2L A100C was determined and discussed with a special emphasis on its hydrophobic tunnel. The SCP-2L mutants were covalently modified at their unique cysteine with two different N-ligands (phenanthroline or dipicolylamine based) or three different phosphine ligands (all based on triphenylphosphine) in order to increase their binding capabilities towards metals. The metal binding capabilities of these artificial proteins towards different transition metals was determined. Phenanthroline modified SCP-2L was found to be a promising scaffold for Pd(II)-, Cu(II)-, Ni(II)- and Co(II)-enzymes while dipicolylamine-modified SCP-2L was found to be a promising scaffold for Pd(II)-enzymes. The rhodium binding capacity of two additional phosphine modified protein scaffolds was also investigated. Promising scaffolds for Rh(I)- and Ir(I)-enzymes were identified. Rh-enzymes of the phosphine modified proteins were tested in the aqueous-organic biphasic hydroformylation of linear long chain 1-alkenes and compared to the Rh/TPPTS reference system. Some Rh-enzymes were found to be several orders of magnitude more active than the model system while yielding comparable selectivities. The reason for this remarkable reactivity increase could not be fully elucidated but several potential modes of action could be excluded. Cu-, Co-, and Ni-enzymes of N-ligand modified SCP-2L A100C were tested in the asymmetric Diels-Alder reaction between cyclopentadiene and trans-azachalcone. A promising 29% ee for the exo-product was found for the phenanthroline modified protein in the presence of nickel. Further improvement of these catalyst systems by chemical means (e.g. optimisation of ligand structure) and bio-molecular tools (e.g. optimisation of protein environment) can lead to even more active and (enantio)selective catalysts in the future.
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Книги з теми "Alkenes and Dienes"

1

Perekalin, V. V., Z. F. Pavlova, and E. S. Lipina. Conjugated 1,2-and 1,4-Nitrothio(sulfonyl)alkenes and -Dienes (Sulfur Reports). Routledge, 1995.

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2

Dockendorff, Christopher James. New methods for carbon-carbon bond formation and application to organic synthesis: Metal-catalyzed additions of organoborons to activated alkenes and aryne Diels-Alder reactions with acyclic dienes: Y Christopher James Dockendorff. 2006.

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3

Konzelman, James. Acyclic diene metathesis (ADMET) polymerization: A hydrocarbon structure reactivity study. 1993.

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Частини книг з теми "Alkenes and Dienes"

1

Kilway, Kathleen V., and Andrew Streitwieser. "Acidity of Alkenes and Polyenes." In The Chemistry of Dienes and Polyenes, 733–51. Chichester, UK: John Wiley & Sons, Ltd, 2003. http://dx.doi.org/10.1002/0470857218.ch16.

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2

Dinda, Biswanath. "Photochemistry of Alkenes, Dienes, and Polyenes." In Lecture Notes in Chemistry, 215–39. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-45934-9_7.

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3

Chambers, R. D., S. L. Jones, S. J. Mullins, A. Swales, P. Telford, and M. L. H. West. "Perfluorinated Alkenes and Dienes in a Diverse Chemistry." In ACS Symposium Series, 68–81. Washington, DC: American Chemical Society, 1991. http://dx.doi.org/10.1021/bk-1991-0456.ch005.

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4

Tsuno, Takashi. "Organic aspects: photochemistry of alkenes, dienes, polyenes (2020–2021)." In Photochemistry, 67–124. Cambridge: Royal Society of Chemistry, 2022. http://dx.doi.org/10.1039/9781839167676-00067.

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5

Tsuno, Takashi. "Organic aspects: photochemistry of alkenes, dienes, polyenes (2016–2017)." In Photochemistry, 78–115. Cambridge: Royal Society of Chemistry, 2018. http://dx.doi.org/10.1039/9781788013598-00078.

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6

Tsuno, Takashi. "Organic aspects: photochemistry of alkenes, dienes, polyenes (2018–2019)." In Photochemistry, 71–112. Cambridge: Royal Society of Chemistry, 2020. http://dx.doi.org/10.1039/9781839162114-00071.

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7

Latscha, Hans Peter, and Helmut Alfons Klein. "Ungesättigte Kohlenwasserstoffe II. Konjugierte Alkene, Diene und Polyene." In Organische Chemie, 71–79. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-662-09141-8_6.

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Latscha, Hans Peter, and Helmut Alfons Klein. "Ungesättigte Kohlenwasserstoffe II. Konjugierte Alkene, Diene und Polyene." In Organische Chemie, 71–79. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-662-09142-5_6.

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Latscha, Hans Peter, Helmut Alfons Klein, and Klaus Gulbins. "Ungesättigte Kohlenwasserstoffe II. Konjugierte Alkene, Diene und Polyene." In Chemie für Laboranten und Chemotechniker, 53–55. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-85881-9_6.

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Latscha, Hans Peter, Helmut Alfons Klein, and Klaus Gulbins. "Ungesättigte Kohlenwasserstoffe II. Konjugierte Alkene, Diene und Polyene." In Chemie für Laboranten und Chemotechniker, 53–55. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-96875-4_6.

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Тези доповідей конференцій з теми "Alkenes and Dienes"

1

Reihani, Amin, Brent Patterson, John Hoard, Galen B. Fisher, Joseph R. Theis, Christine K. Lambert, Evgeny Smirnov, and Dirk Roemer. "Rapidly Pulsed Reductants for Diesel NOx Reduction With Lean NOx Traps: Comparison of Alkanes and Alkenes as the Reducing Agent." In ASME 2016 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icef2016-9475.

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Lean NOx Traps (LNTs) are often used to reduce NOx on smaller diesel passenger cars where urea-based Selective Catalytic Reduction (SCR) systems may be difficult to package. However, the performance of LNTs at temperatures above 400°C needs to be improved. The use of Rapidly Pulsed Reductants (RPR) is a process in which hydrocarbons are injected in rapid pulses ahead of the LNT in order to improve its performance at higher temperatures and space velocities. This approach was developed by Toyota and was originally called Di-Air (Diesel NOx aftertreatment by Adsorbed Intermediate Reductants) [1]. There is a vast parameter space that needs to be explored in order to maximize the NOx conversion at high temperatures and flow rates while minimizing the fuel penalty associated with the hydrocarbon injections. Four parameters were identified as important for RPR operation: (1) the flow field and reductant mixing uniformity; (2) the pulsing parameters including the pulse frequency, duty cycle, and rich magnitude; (3) the reductant type; and (4) the catalyst composition, including the type and loading of precious metal, the type and loading of NOx storage material, and the amount of oxygen storage capacity (OSC). In this study, RPR performance was assessed between 150°C and 650°C with several reductants including dodecane, propane, ethylene, propylene, H2, and CO. A novel injection and mixer system was designed that allowed for the investigation of previously unexplored areas of high frequency injections up to f = 100Hz. Under RPR conditions, H2, CO, dodecane, and C2H4 provided approximately 80% NOx conversion at 500°C, but at 600°C the conversions were significantly lower, ranging from 40 to 55%. The NOx conversion with C3H8 was low across the entire temperature range, with a maximum conversion of 25% near 300°C and essentially no conversion at 600°C. In contrast, C3H6 provided greater than 90% NOx conversion over a broad range of temperature between 280°C and 630°C. Among the hydrocarbons, this suggested that the high temperature NOx conversion with RPR improves as the reactivity of the hydrocarbon increases.
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