Changes in specific surface area of calcined coke and petroleum coke
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What changes occur in the physical and chemical properties of petroleum coke after it is converted into calcined coke through calcination? In particular, what is the range of change in specific surface area? How much can it increase from one value to another?
The specific surface area of petroleum coke is 2.0992 m2/g, and its total pore volume is 0.00747 cm3/g. Petcoke has a very low initial specific surface area, and thus virtually no adsorption capacity. It has a high fixed carbon content and a very compact structure, lacking a complex pore structure. Another round of calcination will further volatilize the moisture and volatile components; the specific surface area is likely to decrease further, and the adsorption capacity will not improve. Experts and professors provided advice on how to make more rational use of the graphite phase.