Supercritical gasification is a promising technology for the utilisation of biomass and plastic wastes. To further understand the synergistic effect of lignin and plastic co-gasification under the influence of supercritical water, the microscopic mechanism of the co-gasification of lignin and plastic in supercritical water was studi,d using reactive molecular dynamics simulations. The influence of temperature on the evolution behaviour of the carbon chains was also analysed. At low temperatures, lignin cracks slowly, whereas most polyethylene does not crack, and gas production yield is low. The quantity of supercritical water participating in gasification increases with increasing temperature, but there exists an upper limit to this increase. At hig h temperatures, the main gasification products include H2, CH4, CO and CO2.
Bibliographical noteFunding: This research was funded by the National Natural Science Foundation of China (No.51936009 and No. 51721004), and Shaanxi Provincial Department of science and technology (NO.2020JQ-907).
Data Availability StatementSupplementary data
Supplementary data to this article can be found online at https://doi.org/10.1016/j.ijhydene.2022.04.251
- Plastic waste
- Supercritical water