Oxidative dehydrogenation

Japanese: 酸化脱水素 - さんかだっすいそ（英語表記）oxidative dehydrogenation

This is a process in which dehydrogenation of hydrocarbons is carried out in the presence of oxygen (or air) to produce unsaturated compounds. For example, reactions such as the production of styrene from ethylbenzene and butadiene from n -butene are examples of this. Normal dehydrogenation reactions, in which hydrogen from the raw hydrocarbons is released as hydrogen molecules, are large endothermic reactions, and therefore higher temperatures are more favorable for the product system. However, if the reaction is carried out at high temperatures, carbonaceous matter is deposited on the catalyst, causing a rapid decrease in activity.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

炭化水素の脱水素反応を酸素(または空気)の共存下で行い，不飽和化合物を生産するプロセスをいう。たとえば，次のようなエチルベンゼンからのスチレン，n‐ブテンからのブタジエンの製造などの反応がそれである。これらの原料炭化水素の水素が水素分子として脱離するふつうの脱水素反応は大きな吸熱反応であり，したがって高温ほど生成系に有利である。しかし高温で反応を行うと触媒上に炭素質が析出し，急速に活性が低下してしまう。

出典　株式会社平凡社世界大百科事典第２版について　情報

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