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Methane/water Adsorption Properties of Synthetic Imogolite Nanotubes

Published online by Cambridge University Press:  15 February 2011

Fumihiko Ohashi ,
Shinji Tomura  and
Shin-Ichiro Wada
Fumihiko Ohashi
Affiliation:
Materials Research Institute for Sustainable Development, AIST Chubu, Shimo-Shidami, Moriyama, Nagoya 463-8560, JAPAN
Shinji Tomura
Affiliation:
Materials Research Institute for Sustainable Development, AIST Chubu, Shimo-Shidami, Moriyama, Nagoya 463-8560, JAPAN
Shin-Ichiro Wada
Affiliation:
Agricultural Department, Kyushu University, 6-10-1 Higashi, Hakozaki, Fukuoka 812-8581, JAPAN
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Abstract

Aluminosilicate nanotubes (imogolite) have been synthesized from highly concentrated inorganic solutions by hydrothermal treatment. These can be converted to microporous nanofibers with a pore radius in the range of 0.3-0.6 nm referring to the results from the nitrogen adsorption isotherm. The water vapor adsorption isotherms indicated that the natural imogolite plotted a proportional isothermal curve where the amount of adsorbed water increased in proportion to P/P0: the maximum amount of adsorbed water was ca. 60 wt%. The synthetic imogolite showed a rapid increase at 0.9-0.95 range of P/P0 and achieved a maximum of ca. 80 wt%, with a better methane storage property than that of the usual compressed natural gas storage. In order to obtain a high ratio of water adsorption and a large methane storage capacity, it is necessary to control the micro/meso porous structure and the hydrophilic/hydrophobic surface affinity. It is expected that the synthetic imogolite might become a multipurpose adsorbent.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 878: Symposium Y – Solvothermal Synthesis and Processing of Materials , 2005 , Y3.1
Copyright
Copyright © Materials Research Society 2005

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