Document Detail

Diffusion-Barrier-Free Porous Carbon Monoliths as a New Form of Activated Carbon.
MedLine Citation:
PMID:  23019152     Owner:  NLM     Status:  Publisher    
For the practical use of activated carbon (AC) as an adsorbent of CH(4) , tightly packed monoliths with high microporosity are supposed to be one of the best morphologies in terms of storage capacity per apparent volume of the adsorbent material. However, monolith-type ACs may cause diffusion obstacles in adsorption processes owing to their necked pore structures among the densely packed particles, which result in a lower adsorption performance than that of the corresponding powder ACs. To clarify the relationship between the pore structure and CH(4) adsorptivity, microscopic observations, structural studies on the nanoscale, and conductivity measurements (thermal and electrical) were performed on recently developed binder-free, self-sinterable ACs in both powder and monolithic forms. The monolith samples exhibited higher surface areas and electrical conductivities than the corresponding powder samples. Supercritical CH(4) adsorption isotherms were measured for each powder and monolith sample at up to 7 MPa at 263, 273, and 303 K to elucidate their isosteric heats of adsorption and adsorption rate constants, which revealed that the morphologies of the monolith samples did not cause serious drawbacks for the adsorption and desorption processes. This will further facilitate the availability of diffusion-barrier-free microporous carbon monoliths as practical CH(4) storage adsorbents.
Takashi Kubo; Hirotoshi Sakamoto; Toshihiko Fujimori; Tsutomu Itoh; Tomonori Ohba; Hirofumi Kanoh; Manuel Martínez-Escandell; José M Ramos-Fernández; Mirian Casco; Francisco Rodríguez-Reinoso; Koki Urita; Isamu Moriguchi; Morinobu Endo; Katsumi Kaneko
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-9-28
Journal Detail:
Title:  ChemSusChem     Volume:  -     ISSN:  1864-564X     ISO Abbreviation:  ChemSusChem     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-9-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101319536     Medline TA:  ChemSusChem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522 (Japan).
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