公开(公告)号：US20180345338A1

公开(公告)日：2018-12-06

申请号：US15608797

申请日：2017-05-30

Applicant: Chevron U.S.A. Inc.

Inventor： David G. THOMAS ,  Kanwartej S. SRA ,  Paul J. H. BIRETA ,  Gabriel P. SABADELL

IPC: B09C1/06 ,  F23G7/14

CPC classification number: B09C1/06 ,  F23G7/14 ,  F23G2209/24

Abstract: 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.

公开(公告)号：US20190071330A1

公开(公告)日：2019-03-07

申请号：US16119599

申请日：2018-08-31

Applicant: Chevron U.S.A. Inc.

Inventor： David G. THOMAS ,  Roopa KAMATH ,  Eric DANIELS ,  David A. REYNOLDS

IPC: C02F1/469 ,  C02F1/461

Abstract: Provided herein are devices, systems, and methods for removing contaminant ions from water within an aquifer. The devices, systems, methods employ an elecrokinetic driving force to induce the migration of charged species towards electrodes, where they can be concentrated and removed from the aquifer. In this way, the devices, systems, methods described herein can be used to economically remediate groundwater contaminated with charged species.