Method and system for producing activated carbon

Details Method and system for producing activated carbon Method and system for producing activated carbon

2008-11-28

2011-10-18

Mayes, Melvin (Department: 1732)

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

C423S44500R, C264S217000, C502S416000

Reexamination Certificate

active

08038976

ABSTRACT:
An activated carbon producing system includes a heating furnace for thermally decomposing multi-layer film including a polyvinyl alcohol layer and cellulose triacetate (TAC) layers formed on surfaces of the polyvinyl alcohol layer, to produce carbonized material by carbonization. An activation device activates the carbonized material with heat, to produce activated carbon by forming fine pores therein. A burner assembly combusts acetic acid contained in pyrolysis gas created by thermal decomposition in the heating furnace, to produce gaseous carbon dioxide. A first heat exchanger exchanges heat between the pyrolysis gas from the burner assembly and heat exchange medium, to provide the heating furnace with the heat of the heat exchange medium. A washer absorbs gaseous carbon dioxide contained in the pyrolysis gas from the first heat exchanger by use of alkaline absorption solution. If the multi-layer film contains additive, the washer washes away the combusted additive.

REFERENCES:
patent: 4104129 (1978-08-01), Fields et al.
patent: 2010/0015395 (2010-01-01), Otoshi et al.
patent: 07-172808 (1995-07-01), None
patent: 11-171524 (1999-06-01), None
patent: WO 2008090938 (2008-07-01), None

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