THOMAS, David G.,SRA, Kanwartej S.,BIRETA, Paul J. H.,SABADELL, Gabreil P.
申请号：
WO2018IB53727
公开号：
WO2018220492(A1)
申请日:
2018.05.25
申请国别(地区):
世界知识产权组织国际局
年份:
2018
代理人:
摘要：
Porous media containing undesired substances, e.g., perfluoroalkylated substances, are treated by mixing the porous media with a solid fuel comprising organic material. The mixture is heated to 200°C to 400°C to initiate smoldering combustion and an oxidizer gas is forced through the heated mixture such that the smoldering combustion is self-sustaining until the mixture reaches a PFAS destructive temperature and the perfluoroalkylated substances are thermally destroyed. A system is provided for conducting the treatment. The system includes a source of wax, wood chips, sawdust, tire scraps, waste rubber compounds, coal, granular activated carbon, solid fat, and combinations thereof as solid fuel. A mixer is provided for mixing the porous media with the solid fuel. An ignition system including static heating elements and a gas blower are provided for forcing heated oxidizer gas through the mixture such that self-sustaining smoldering combustion of the mixture is initiated and sustained.
