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For cyclohexane, cyclohexene, and cyclohexadiene, dehydrogenation is the conceptually simplest pathway for aromatization. The activation barrier decreases with the degree of unsaturation. Thus, cyclohexadienes are especially prone to aromatization. Formally, dehydrogenation is a redox process. Dehydrogenative aromatization is the reverse of ...
Cyclohexane is a cycloalkane with the molecular formula C 6 H 12. ... (500 K) = -216.37 kJ/mol. Dehydrogenation commenced noticeably above 300 °C, reflecting the ...
In chemistry, dehydrogenation is a chemical reaction that involves the removal of hydrogen, usually from an organic molecule. It is the reverse of hydrogenation . Dehydrogenation is important, both as a useful reaction and a serious problem.
The sensitivity of catalytic reforming to contamination by sulfur and nitrogen requires hydrotreating the naphtha before it enters the reformer, adding to the cost and complexity of the process. Dehydrogenation, an important component of reforming, is a strongly endothermic reaction, and as such, requires the reactor vessel to be externally heated.
In the presence of a catalyst and at temperatures of about 495 to 525 °C, naphthenes undergo dehydrogenation to give aromatic derivatives: noice. The process provides a way to produce high octane gasoline. In another major industrial process, cyclohexanol is produced by the oxidation of cyclohexane in air, typically using cobalt catalysts: [24]
The dehydrogenation of cycloalkanes is highly endothermic (63-69 kJ/mol H 2), which means this process requires high temperature. [58] Dehydrogenation of decalin is the most thermodynamically favored among the three cycloalkanes, and methyl-cyclohexane is second because of the presence of the methyl group. [ 63 ]
In 1911 he carried out a smooth dehydrogenation of cyclohexane and its homologues into aromatic hydrocarbons in the presence of platinum and palladium catalysts; he widely used this reaction to determine the content of cyclohexane hydrocarbons in gasoline and kerosene fractions of oil (1920–1930), and also as an industrial method for ...
In chemistry, transfer hydrogenation is a chemical reaction involving the addition of hydrogen to a compound from a source other than molecular H 2.It is applied in laboratory and industrial organic synthesis to saturate organic compounds and reduce ketones to alcohols, and imines to amines.