Composite microporous carbons for fuel gas storage

B - Operations – Transporting – 01 – J

Patent

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B01J 20/20 (2006.01) B01J 20/30 (2006.01) B01J 21/18 (2006.01) B01J 37/08 (2006.01)

Patent

CA 2229542

A method of making a microporous carbon material which includes providing a precursor selected from the group consisting of crystalline salts of aromatic sulfonates and nonporous polymeric salts. Prior to carbonization, the precursor is treated by ion exchange or other conventional processes to introduce a metal such as iron, nickel and cobalt into the precursor. Heat treatment of such composite precursors in the temperature range of 350 to 850 ~C in an inert oxygen free atmosphere for a sufficient time promotes thermally induced hydrogen abstraction and rearrangement of BSUs which result in the formation of a composite, carbonaceous microporous material which contains a metal component, and has a pore size distribution in the range of about 4-15 .ANG.. The structural and storage characteristics of the microporous carbon materials are also disclosed.

Procédé de fabrication d'un matériau carbone microporeux qui fait appel à un précurseur choisi dans le groupe formé des sels cristallins de sulfonates aromatiques et des sels polymères non poreux. Avant la carbonisation, on traite le précurseur par échange d'ions ou par d'autres procédés conventionnels pour y introduire un métal tel que le fer, le nickel et le cobalt. Le traitement thermique de ces précurseurs composites à une température allant de 350 à 850 ·C, dans une atmosphère inerte exempte d'oxygène sur une durée suffisante, entraîne une extraction de l'hydrogène thermiquement induite et un réarrangement des unités structurelles de base. Ceci a pour résultat la formation d'un matériau microporeux carboné composite qui contient un constituant métallique et dont la taille des pores est comprise entre 4 et 15 .ANG. environ. L'invention concerne également les caractéristiques de structure et de stockage des matériaux carbonés microporeux.

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