| 摘要 |
An activated carbon coated with an intumescent material which will expand at an elevated temperature and render the activated carbon resistant to oxidation. The activation carbon can be in granulated form, including pelletized, and impregnated. The intumescent material is preferably attached to about 10% of the exterior surface of the activated carbon and when exposed to a certain elevated temperature the intumescent material will expand and cover all or almost all of the exterior surface of the activated carbon thereby preventing its burning. The amount of intumescent material is not operable for causing a detrimental reduction in the adsorption capacity of the activated carbon when the coated activated carbon is at temperatures below the certain designed elevated temperature.
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