A method for making an activated carbon material for a supercapacitor includes: heating a heavy hydrocarbon oil at 2 atm to 3 atm and 480 C. to 580 C. for at least 4 hours such that the heavy hydrocarbon oil undergoes a coking reaction to form a soft carbon precursor containing a mesophase structure of greater than 50 vol % and having a quinoline-insoluble content from 78 wt % to 98 wt % and a toluene-insoluble content from 88 wt % to 100 wt %; mixing the soft carbon precursor and an activator to obtain a mixture; heating the mixture to obtain a first carbonaceous component containing an activated carbon and a residual of the activator; removing the residual of the activator to obtain a second carbonaceous component; grinding and sizing the second carbonaceous component to obtain a third carbonaceous component; and heating the third carbonaceous component to obtain the activated carbon material.

A method for catalytic cracking of PVC waste using a zeolite catalyst to obtain a hydrocarbon mixture of gas components that are useful resources. The catalytic cracking method has high selectivity of useful components and can lower the content of chlorine, a harmful component.