摘要
Suitable disposal pathways of waste plastics and coal fly ash have yet not been established which is a matter of great envi-ronmental concern.Waste low-density polyethylene(LDPE)and high-density polyethylene(HDPE)were degraded using a semi-batch reactor along with acid or alkali modified fly ash catalyst.The high yield of liquid fuel product(about 87.24 wt%)was achieved for low-density polyethylene at a polymer and catalyst ratio of 25 w/w.About 96%conversion was found with very few amount of gaseous fuels.Both of the waste plastics were degraded at 400-450℃.The liquid products were analyzed using Fourier-transform infrared spectroscopy(FTIR),nuclear magnetic resonance(^(1)H,^(13)C,and DEPT-135 NMR),and gas chromatography-mass spectrometry(GC-MS).Fly ash is an efficient catalyst to degrade waste plastic into light weight liquid(gasoline and kerosene)hydrocarbons.The NMR results accompanied by GC-MS data ensure that obtained fuels contain both aliphatic(saturated and unsaturated)and aromatic hydrocarbons.This plastic-to-fuel technology should be commercialized owing to be profitable and eco-friendly.
基金
This work was supported by the National Science Fund for Distinguished Young Scholars(No.51825605).
