Topic
Hexane
About: Hexane is a research topic. Over the lifetime, 3759 publications have been published within this topic receiving 57996 citations. The topic is also known as: CH3-[CH2]4-CH3 & hexyl hydride.
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TL;DR: In this paper, the solubilities of nine individual polychlorinated biphenyl (PCB) congeners were determined over a pressure range of 100-300 bar using an electron capture detector (ECD).
Abstract: The solubilities of nine individual polychlorinated biphenyl (PCB) congeners 2-chlorobiphenyl, 4-chlorobiphenyl, 2,2′-dichlorobiphenyl, 4,4′-dichlorobiphenyl, 2,4′,5-trichlorobiphenyl, 3,3′,4,4′-tetrachlorobiphenyl, 2,2′,4,5,5′-pentachlorobiphenyl, 2,2′,4,4′,5,5′-hexachlorobiphenyl, and 2,2′,3,4,4′,5,5′-heptachlorobiphenyl in supercritical carbon dioxide and in supercritical carbon dioxide modified by n-butane (n-C4H10) and methanol (0.05 mole fractions on a solute-free basis) are presented. The concentrations of the PCB/hexane solutions are analyzed by capillary gas chromatography with an electron capture detector (GC/ECD). Solubility isotherms at 313, 323, and 333 K for each PCB congener have been determined over a pressure range of 100–300 bar. The solubility data (expressed as mole fractions) are correlated by a semi-empirical equation to link the solubility to the thermodynamic properties of solvent such as reduced density, solute vapor pressure, reduced temperature and reduced pressure of the system. Both n-butane and methanol were found to increase the solubility over the case of pure carbon dioxide of all PCB congeners studied (higher in CO2/n-C4H10 fluids).
42 citations
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TL;DR: In this paper, the rate constants for the reactions of OH radicals with seventeen aromatic hydrocarbons were determined at atmospheric pressure and room temperature from competitive reactions with hexane, using H2O2 as the OH-radical source.
Abstract: The rate constants for the reactions of OH radicals with seventeen aromatic hydrocarbons were determined at atmospheric pressure and room temperature from competitive reactions with hexane, using H2O2 as the OH-radical source. A useful trend was found in the structure-reactivity relationship.
42 citations
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TL;DR: In this paper, a bifunctional n-hexane isomerization was studied over sulphated zirconia with Pt, Rh, Ir, and Ru, and the Pt-promoted sample showed the highest activity, and it was considerably more active than a commercial, zeolite-based catalyst.
Abstract: Isomerisation of n -hexane has been studied at industrially relevant conditions over sulphated zirconia promoted with Pt, Rh, Ir, and Ru. The Pt-promoted sample showed the highest activity, and it was considerably more active than a commercial, zeolite-based catalyst. The samples promoted with rhodium and iridium showed a lower, and similar activity, while ruthenium was less efficient and gave a less stable catalyst. The selectivities were similar for all the samples, with the methylpentanes and 2,3-dimethylbutane as main and primary products. Measured kinetic parameters for the reaction were in agreement with a conventional bifunctional mechanism: Positive order in n -hexane, negative in hydrogen and an activation energy around 90 kJ/mol. Prereduction of the samples was necessary to achieve a high activity, but if the activation temperature was too high the activity was lost, probably due to the loss of sulphate groups through excessive reduction.
42 citations
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TL;DR: In this article, triticale straw was extracted with supercritical carbon dioxide (SC-CO 2 ) and hexane for 90 min at a flow rate of 50 g/min at different pressures (250, 300, 350 and 400 bar) for 90 days.
42 citations
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TL;DR: In this article, a carbon supported copper oxide (CuO/C) catalyst was prepared for the esterification of FFA in the rubber seed oil (RSO) which was extracted from the fresh seed by soxhlet extractor using hexane as a solvent.
42 citations