Patent ID: 6156287
Filing Date: 2000-12-05
Classification: B01J,D01F,Y10T

Abstract:
A method for preparing a PAN-based activated carbon fabric, comprising the steps of:(a) providing a PAN-based oxidized carbon fabric having a bonded oxygen amount of less than 40%;(b) passing carbon dioxide through water to form an activating gas; and(c) subjecting said PAN-based oxidized carbon fabric to activation by heating in a high temperature furnace at a temperature of 700.degree. C. to 1000.degree. C. for 1 minute to 1 hour with the introduction of the activating gas, the high temperature furnace having an inlet and an outlet, the inlet and outlet being protected with inert gas; wherein warp yarn of the PAN-based oxidized carbon fabric is supported by tension rollers in said high temperature furnace so as to limit shrinkage of the warp yarn to a predetermined value, and weft yarn of the PAN-based oxidized carbon fabric is supported by tensioning devices in said high temperature furnace so as to limit shrinkage of the weft yarn to a predetermined value.