The Exchange Reaction of Deuterium with the Hydroxyl Groups of Zeolite Catalysts

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概要

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• In order to estimate the reactivity of each hydroxyl group, the exchange reaction of deuterium with the hydroxyl groups on the surfaces of the HX, HY, and CaHX zeolites and aerosil was investigated kinetically by an infrared method. The hydroxyl groups appearing at 3660 cm<SUP>−1</SUP> on the HX and HY zeolites were more readily exchanged with deuterium than were the other hydroxyl groups on the two zeolites. However, in the case of the CaHX, the order of activities of each hydroxyl group changed with the pressure of deuterium. The rate equation for the reaction is expressed by a Langmuir-type equation. This fact indicates the homogeneity of each hydroxyl group on zeolite. It was found that adsorbed water and carbon dioxide catalyzed the exchange reaction. Furthermore, a compensation effect between the apparent activation energies and the frequency factors occurs in this reaction.

• 公益社団法人 日本化学会の論文

著者

• Okamoto Yasuaki

  Osaka University, Department of Chemical Engineering, Faculty of Engineering Science

• Imanaka Toshinobu

  Osaka University, Department of Chemical Engineering, Faculty of Engineering Science

• Takahata Kazunori

  Osaka University, Department of Chemical Engineering, Faculty of Engineering Science

• Teranishi Shiichiro

  Osaka University, Department of Chemical Engineering, Faculty of Engineering Science

関連論文

• The Exchange Reaction of Deuterium with the Hydroxyl Groups of Zeolite Catalysts

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