Densification of ordered microporous carbons and controlling their micropore size by hot-pressing

Peng Xiang Hou, Hironori Orikasa, Hiroyuki Itoi, Hirotomo Nishihara, Takashi Kyotani

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Ordered microporous carbons synthesized by the template method using zeolite Y were hot-pressed at 573 K up to 147 MPa, aiming at densification of the templated carbons for the future use as energy storage media. Upon the hot-pressing, the powdery templated carbons were easily pelletized without any binder and the bulk density was significantly increased from 0.2 g/cm3 to 0.7-0.9 g/cm3. As a result, both the surface area and micropore volume per unit volume were increased. Surprisingly, it was found that the hot-pressing treatment reduced the average micropore size and it was tunable by simply adjusting a pressure in the treatment. In contrast, such changes in the density and the pore structure were not observed for commercial KOH-activated carbons when they were hot-pressed under the same conditions. The observed peculiar behavior of the templated carbons upon the hot-pressing can be explained by their unique molecular structure as compared to the conventional activated carbons.

Original languageEnglish
Pages (from-to)2011-2016
Number of pages6
JournalCarbon
Volume45
Issue number10
DOIs
Publication statusPublished - 2007 Sep 1

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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