Characteristics of PVC pyrolysis products under electric field

This paper studied the effect of dielectric barrier discharge (DBD) on pyrolysis product characteristics of polyvinyl chloride (PVC) through experimentation, exploring PVC pyrolysis treatment with a new idea. Through characterization and analysis of pyrolysis products, the discharge obviously affected the pyrolysis products of PVC. It increased the carbon residue rate of PVC pyrolysis products and the H/C ratio of carbonized products; the said rate increased by 7.02% when the discharge voltage reached 20 kV. Meanwhile, from the SEM and BET analyses of carbonized products, the microstructure and electrical conductivity of these products could be improved by discharge. Pore volume of the carbonized products increased by 39.3%, 48.2% respectively, and the average pore diameter of carbonized products increased by 40.4%. Furthermore, the composition of tar products of PVC pyrolysis could be changed. The effect of 20 kV discharge would entail a decrease in aromatic content by 11.48%. Overall, this paper provided a thinking to improve PVC pyrolysis products and a reference for better recycling of PVC waste.