Porous Properties of Activated Carbons Prepared from Mixtures of Synthesized Phenolic Resins with Metal Salts

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Shin R. Mukai¹  Kyuya Nakagawa³  Kazuhisa Tamura²  Hajime Tamon²  Tetsuo Suzuki² 

[1] Division of Chemical Process Engineering, Graduate School of Engineering, Hokkaido University;Department of Chemical Engineering, Kyoto University;Department of Mechanical Engineering, University of Hyogo

关键词: Activated Carbon;    Activation;    Adsorption;    Mesopore;    Phenolic Resin;   

DOI  :  10.1252/jcej.40.410

来源: Maruzen Company Ltd

【 摘 要 】

References(11)Activated carbons were prepared from carbonized phenolic resins by steam-activation via a pre-treatment, that is mixing of raw materials with Ca(NO3)2·4H2O and acid-treatment after carbonization. This pre-treatment method has been reported as a method to produce mesoporous activated carbons. In the present work, three different novolak type phenol formaldehyde resins were synthesized under different molar ratio of formaldehyde (F) to phenol (P) (F/P = 0.3, 0.5, and 0.8) and were used as the precursors for activated carbons. It was confirmed that the pre-treatment method effectively enhances mesopores on activated carbons from synthesized phenolic resins prepared by F/P = 0.3 and 0.5, and their pore size distributions depended on the synthesizing conditions (F/P). Namely, it was found that by decreasing the F/P ratio of the precursor resin to the values lower than those usually adopted for commercial phenolic resin production, i.e., less than 0.5, activated carbons with developed mesopores could be obtained. The micropore developments of activated carbons were also influenced by F/P, and the influences were on the formation of pores larger than 0.40 nm. It was suggested that the thermoplastic nature of prepared resins (that can be changed by F/P) influence the porous properties of resultant activated carbons and the effect of the pre-treatments.

【 授权许可】

Unknown