Granulation of active carbon by different methods and their characteristics for catalyst supports

✍ Scribed by Tomoyuki Inui; Takeo Suzuki; Yoshinobu Takegami

• Publisher: Elsevier Science
• Year: 1984
• Tongue: English
• Weight: 559 KB
• Volume: 22
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(84)90008-3

✦ Synopsis

Granulated active-carbon support was prepared by either a co-precipitation or a mechanical mixing method. Characteristics of these supports were investigated by measuring their physical properties and catalytic performance for both surface reactions and gas-solid reactions. Methanation of carbon oxides and oxidation of carbon were chosen respectively as model reactions. Co-La,O, was employed as the common catalyst components. When the supports were prepared by a co-precipitation method m, the granule binder, aluminum hydroxide, blocked the mesopores of the active carbon, and catalyst constituents were dispersed mainly in the macropore regions. Consequently, the mean particle size of the catalyst components was large. On the other hand, the blockage of mesopores was avoided when the supports were prepared by a mechanical mixing method [II], and the catalytic constituents were dispersed not only in macropore regions but also in mesopore regions. The features of the supports prepared by methods p] and [II] are respectively suitable for the surface and gas-solid reactions.