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Catalytic Destruction of Chlorinated Solvents in Soil Vapor

Catalytic Destruction of Chlorinated Solvents in Soil Vapor. Student: Jagoda Vojvodic Mentor: Eric Betterton University of Arizona Space Grant. Superfund. Federal government’s program to clean up hazardous waste sites from a priority list of 1246 Common contaminants:

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Catalytic Destruction of Chlorinated Solvents in Soil Vapor

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  1. Catalytic Destruction of Chlorinated Solvents in Soil Vapor Student: Jagoda Vojvodic Mentor: Eric Betterton University of Arizona Space Grant

  2. Superfund • Federal government’s program to clean up hazardous waste sites from a priority list of 1246 • Common contaminants: • Trichloroethylene (TCE) • Tetrachloroethylene (PCE)

  3. Priority List of Hazardous Substances

  4. Motivation • Pose risk to the human and ecological health from groundwater contamination • Current remedies with activated carbon are too expensive and do not destroy the contaminant

  5. Propane as reductant • Economic alternative to using Hydrogen in conversion of PCE • Concentrated on experiments of propane conversion under various conditions

  6. Lab Process Flow DiagramPCE + reductant + O2 CO2 + H20 + HCl

  7. Cross section of reactor

  8. Propane Conversion dataVarying amount of oxygen from 5% to 40%

  9. Varying propane concentration,oxygen concentration constant

  10. Propane effect on PCE conversion

  11. Conclusion • Can destroy the chlorinated solvents using a Pt/Rh catalyst effectively • Need 1.5% Propane to destroy 500ppm of PCE at 440 C

  12. Price Comparison At >1% Propane, we can destroy 1lb of PCE using: Propane: $5 Hydrogen: $100

  13. Acknowledgements NASA Space Grant Susan Brew Eric Betterton, Eduardo Saez, Robert Arnold, Brian Barbaris Erik Rupp, Marty Willinger, Suzanne Richards, Desiree Polson

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