The Experts below are selected from a list of 225 Experts worldwide ranked by ideXlab platform
Kiyoshi Sakai - One of the best experts on this subject based on the ideXlab platform.
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highly enantio and diastereo selective synthesis of c2 symmetric 3 5 cyclohexadiene 1 2 diol and d2 symmetric Cyclohexane 1 2 4 5 tetrol
Tetrahedron-asymmetry, 1995Co-Authors: Hiroshi Suemune, Atsushi Hasegawa, Kiyoshi SakaiAbstract:Abstract Highly enantio- and diastereo-selective synthesis of C 2 -symmetric 3,5-cyclohexadiene-1,2-diol 5 and D 2 -symmetric Cyclohexane-1,2,4,5-tetrol related compounds 7a,b, 10, 11 has been achieved using optically active 4-cyclohexene-1,2-diol (S,S)- 1c prepared by an enzymatic procedure.
Matthew Rutter - One of the best experts on this subject based on the ideXlab platform.
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oxidative dehydrogenation of Cyclohexane on cobalt oxide co3o4 nanoparticles the effect of particle size on activity and selectivity
ACS Catalysis, 2012Co-Authors: Marcel Di Vece, Gihan Kwon, Brian Ricks, Simone Goergen, Qiang Qian, Randall E Winans, Rui Si, Janae E. Debartolo, Sonke Seifert, Matthew RutterAbstract:The oxidative dehydrogenation of Cyclohexane by cobalt oxide nanoparticles was studied via temperature programmed reaction combined with in situ grazing incidence X-ray absorption spectroscopy and grazing incidence small-angle X-ray scattering and theoretical calculations on model Co3O4 substrates. Both 6 and 12 nm Co3O4 nanoparticles were made through a surfactant-free preparation and dispersed on an Al2O3 surface formed by atomic layer deposition. Under reaction conditions the nanoparticles retained their oxidation state and did not sinter. They instead underwent an assembly/disassembly process and could reorganize within their assemblies. The selectivity of the catalyst was found to be size- and temperature-dependent, with larger particles preferentially producing cyclohexene at lower temperatures and smaller particles predominantly resulting in benzene at higher temperatures. The mechanistic features thought to control the oxidative dehydrogenation of Cyclohexane and other light alkanes on cobalt oxid...
Zeynep Serinyel - One of the best experts on this subject based on the ideXlab platform.
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an experimental and modeling study of the low and high temperature oxidation of Cyclohexane
Combustion and Flame, 2013Co-Authors: Zeynep Serinyel, Valérie Warth, Ophélie Frottier, Patricia Dirrenberger, Olivier Herbinet, Pierre-alexandre Glaude, Frederique BattinleclercAbstract:Abstract The experimental study of the oxidation of Cyclohexane has been performed in a jet-stirred reactor at temperatures ranging from 500 to 1100 K (low- and intermediate temperature zones including the negative temperature-coefficient area), at a residence time of 2 s and for dilute mixtures with equivalence ratios of 0.5, 1, and 2. Experiments were carried out at quasi-atmospheric pressure (1.07 bar). The fuel and reaction product mole fractions were measured using online gas chromatography. A total of 34 reaction products have been detected and quantified in this study. Typical reaction products formed in the low-temperature oxidation of Cyclohexane include cyclic ethers (1,2-epoxyCyclohexane and 1,4-epoxyCyclohexane), 5-hexenal (formed from the rapid decomposition of 1,3-epoxyCyclohexane), cyclohexanone, and cyclohexene, as well as benzene and phenol. Cyclohexane displays high low-temperature reactivity with well-marked negative temperature-coefficient (NTC) behavior at equivalence ratios 0.5 and 1. The fuel-rich system ( ϕ = 2) is much less reactive in the same region and exhibits no NTC. To the best of our knowledge, this is the first jet-stirred reactor study to report NTC in Cyclohexane oxidation. Laminar burning velocities were also measured by the heated burner method at initial gas temperatures of 298, 358, and 398 K and at 1 atm. The laminar burning velocity values peak at ϕ = 1.1 and are measured as 40 and 63.1 cm/s for T i = 298 and 398 K, respectively. An updated detailed chemical kinetic model including low-temperature pathways was used to simulate the present (jet-stirred reactor and laminar burning velocity) and literature experimental (laminar burning velocity, rapid compression machine, and shock tube ignition delay times) data. Reasonable agreement is observed with most of the products observed in our reactor, as well as the literature experimental data considered in this paper.
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An experimental and modeling study of the low- and high-temperature oxidation of Cyclohexane
Combustion and Flame, 2013Co-Authors: Zeynep Serinyel, Valérie Warth, Ophélie Frottier, Patricia Dirrenberger, Olivier Herbinet, Pierre-alexandre Glaude, Frédérique Battin-leclercAbstract:The experimental study of the oxidation of Cyclohexane has been performed in a jet-stirred reactor at temperatures ranging from 500 to 1100. K (low- and intermediate temperature zones including the negative temperature-coefficient area), at a residence time of 2. s and for dilute mixtures with equivalence ratios of 0.5, 1, and 2. Experiments were carried out at quasi-atmospheric pressure (1.07. bar). The fuel and reaction product mole fractions were measured using online gas chromatography. A total of 34 reaction products have been detected and quantified in this study. Typical reaction products formed in the low-temperature oxidation of Cyclohexane include cyclic ethers (1,2-epoxyCyclohexane and 1,4-epoxyCyclohexane), 5-hexenal (formed from the rapid decomposition of 1,3-epoxyCyclohexane), cyclohexanone, and cyclohexene, as well as benzene and phenol. Cyclohexane displays high low-temperature reactivity with well-marked negative temperature-coefficient (NTC) behavior at equivalence ratios 0.5 and 1. The fuel-rich system (φ= 2) is much less reactive in the same region and exhibits no NTC. To the best of our knowledge, this is the first jet-stirred reactor study to report NTC in Cyclohexane oxidation. Laminar burning velocities were also measured by the heated burner method at initial gas temperatures of 298, 358, and 398. K and at 1. atm. The laminar burning velocity values peak at φ= 1.1 and are measured as 40 and 63.1. cm/s for Ti= 298 and 398. K, respectively. An updated detailed chemical kinetic model including low-temperature pathways was used to simulate the present (jet-stirred reactor and laminar burning velocity) and literature experimental (laminar burning velocity, rapid compression machine, and shock tube ignition delay times) data. Reasonable agreement is observed with most of the products observed in our reactor, as well as the literature experimental data considered in this paper. © 2013 The Combustion Institute.
Hiroshi Suemune - One of the best experts on this subject based on the ideXlab platform.
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highly enantio and diastereo selective synthesis of c2 symmetric 3 5 cyclohexadiene 1 2 diol and d2 symmetric Cyclohexane 1 2 4 5 tetrol
Tetrahedron-asymmetry, 1995Co-Authors: Hiroshi Suemune, Atsushi Hasegawa, Kiyoshi SakaiAbstract:Abstract Highly enantio- and diastereo-selective synthesis of C 2 -symmetric 3,5-cyclohexadiene-1,2-diol 5 and D 2 -symmetric Cyclohexane-1,2,4,5-tetrol related compounds 7a,b, 10, 11 has been achieved using optically active 4-cyclohexene-1,2-diol (S,S)- 1c prepared by an enzymatic procedure.
Koichiro Nakanishi - One of the best experts on this subject based on the ideXlab platform.
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Solubilities of isobutene in methanol + benzene, methanol + Cyclohexane and benzene + Cyclohexane mixed solvent solutions at 298 K and 27-102 kPa
Fluid Phase Equilibria, 2003Co-Authors: Yoshimori Miyano, Koichiro NakanishiAbstract:The solubilities of isobutene at pressures from 27 to 102kPa and a temperature of 298.15K are presented for three mixed solvent solutions: methanol+benzene, methanol+Cyclohexane and benzene+Cyclohexane. The measured isobutene solubilities are within 5% of being ideal solubilities for methanol+benzene mixtures, within 9% for benzene+Cyclohexane mixtures and within 20% for methanol+Cyclohexane mixtures, there is a qualitative similarity between the excess volumes and excess solubilities. Henry's constants of isobutene in these solvent solutions are evaluated by two different methods. © 2002 Elsevier Science B.V. All rights reserved.
