Transcript Gradek Energy - Brownfields Conference 2015
Gradek Energy
Process for hydrocarbon decontamination of soils
No Chemicals No Bacteria Homogeneous residuals Rapid intervention Immediate results
Overview of Benefits
Removal of hydrocarbons from fines – DNAPL Recovery – Light Hydrocarbon in Aqueous phase Recovery – Chlorinated Hydrocarbon Recovery Energy requirements are minimal
Overview of Benefits
Environmental Benefits: – Reduced volume of residual tailings compared to soil washing – – Increased water recycling Reduced emissions compared to thermal treatment – Reduced methanogenesis Extraction efficiency surpasses all present technology
Solvent recovery Diluted hydrocarbon Solvent Hydrocarbon beads Solvent Evaporator Hydrocarbon coated beads beads Screening Oily soil Settling Vessel Gravel/rocks Water wash Water Mixer Classified soil Washed Gravel/rocks Hydrocarbon Soil Remediation Process
RHS Technology The Bead Properties – Oleophillic – Hydrophobic – Organically stable – Not affected by temperature or climate
RHS Technology The Bead Properties – Re-useable – 500 cycle life with no disposal costs – Solid, resistant granular shape – Easy to recuperate with existing, off-the shelf system
The RHS Beads are introduced into the soil slurry stream to initiate the migration of the hydrocarbons from the soil particles upon contact with the preferential surface of the RHS beads Simulated RHST Process Pipe Wall Flow Stream Beads Oil/soil Slurry
Nanotechnology
The interfacial surface tension between Hydrocarbons and the RHS Bead results in the adsorption of the Hydrocarbons onto the preferential surface of the RHS bead upon contact.
Current Focus
RHS technology introduced to Canadian oil sands operators in 1999 Industry needs oriented towards cleaning up tailings from oil extraction process Over 500 Million m3 of fines in reservoirs Production of over 200,000 m3 per day
RHS Technology Tests Completed Bead Chemistry – University of Montreal – Alberta Research Council Mature Fine Tailings – University of Alberta End of Pipe Tailings – SNC Lavalin\Canmet
Absorbent properties – University of Alberta – University of Montreal – Canmet – Environment Canada – SNC Lavalin\Canmet RHS Technology Tests Completed
RHS Technology
Batch Test Results
Recovery up to 90% of bitumen from tailings where PSD < 100 microns Optimum temp range 35C ° to 45 C° Residual Bitumen less than 1100 ppm in residual tailings, for viscosity > 100,000 cps
RHS Technology
Batch Test Results
Recovers both naphtha and bitumen – Up to 91% Bitumen extraction – Up to 85% naphtha extraction Final design parameters for continuous loop
Stakeholder Objectives Met High throughput yields with immediate results Reduced operating time frame for project Lower operating cost Engineered soil for reclamation Initial step in removing hydrocarbons allows for metal leaching in the slurry
Stakeholder Objectives Met Use of chemical additives is eliminated Homogenous product for quality control Reduced volatile emissions Short execution time reduces liability exposure