Porous carbonaceous material, process for producing the...

B - Operations – Transporting – 01 – J

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B01J 20/20 (2006.01) B01J 21/18 (2006.01) C01B 31/10 (2006.01) C04B 38/00 (2006.01) H01G 4/08 (2006.01) H01G 9/00 (2006.01) H01G 9/058 (2006.01) H01M 4/96 (2006.01) B01J 35/10 (2006.01)

Patent

CA 2191211

A porous carbonaceous material that can adsorb large quantities of nitrogen, oxygen, carbon dioxide and methane is produced in a high yield by a process which comprises the step of halogenating carbonized coal by contact with a halogen gas to yield halogenated carbonized coal and the step of dehalogenating the halogenated coal to eliminate part or all of the halogen atoms therefrom. When this material is used for preparing an electric double-layer capacitor, the obtained capacitor has a larger electrostatic capacity than those prepared from other carbonaceous materials. Thus it is possible to produce a carbonaceous material having micropores and/or submicropores suitable for adsorbing small molecules of nitrogen or the like and storing electrochemical energies.

On produit avec un rendement élevé une matière carbonée poreuse capable d'adsorber des quantités importantes d'azote, d'oxygène, de dioxyde de carbone et de méthane. Le procédé de production employé consiste à halogéner du charbon cokéfié par contact avec un gaz halogène pour produire du charbon cokéfié halogéné puis à déshalogéner le charbon halogéné pour éliminer partiellement ou totalement les atomes halogènes qu'il contient. Lorsqu'on utilise cette matière pour fabriquer un condensateur électrique bi-couche, ce dernier possède une puissance électrostatique plus importante que les condensateurs fabriqués avec d'autres matières carbonées. Il est par conséquent possible de produire une matière carbonée possédant des micropores et/ou des submicropores capables d'adsorber des petites molécules d'azote ou autre et de stocker de l'énergie électrochimique.

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