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Shock Tube Catalytic Activity Experiments

Jerry Zhang University of Southern California Mechanical Engineering. Shock Tube Catalytic Activity Experiments. Overview. What is a shock tube? Adding a catalyst Experiments Results Conclusions. What is a shock tube?. A tube! That fires shock waves

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Shock Tube Catalytic Activity Experiments

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  1. Jerry Zhang University of Southern California Mechanical Engineering Shock Tube Catalytic Activity Experiments

  2. Overview • What is a shock tube? • Adding a catalyst • Experiments • Results • Conclusions

  3. What is a shock tube? • A tube! • That fires shock waves • Allows for us to study chemical kinetics

  4. Shock Tube Layout

  5. From “Modern Compressible Flow”, John D. Anderson, 3rd Ed, McGraw Hill, 2003

  6. From “Modern Compressible Flow”, John D. Anderson, 3rd Ed, McGraw Hill, 2003

  7. From “Modern Compressible Flow”, John D. Anderson, 3rd Ed, McGraw Hill, 2003

  8. Driver Diaphragm Driven Reflected rarefaction Reflected shock Rarefaction fan 5 Head Tail 3 Contact surface 2 Time t 4 Shock front 1 Distance x

  9. Why catalysts? • Catalyst: a substance that increases the rate of a chemical reaction • Allows reactions to happen under preferred conditions (lower temperature, lower concentration) • Homogeneous vs heterogeneous reactions

  10. Shock Tube Layout with Catalyst

  11. Experiments Ethane and methane oxidation With and without catalyst Temperatures: 1000 K – 1500 K Minimal change

  12. Reaction Time (without catalyst)

  13. Increased Concentration and Catalysts

  14. Methane Oxidation

  15. Future Work • Perform Further Analysis on Platinum • Study Other Catalysts • Rh • Pd

  16. Acknowledgements National Science Foundation EEC-NSF Grant # 1062943 Professor Kenneth Brezinsky – UIC AleksandrFridlyand – Graduate Student, UIC Robyn Smith – Graduate Student Candidate, CCNY MiroslawLiszka – Graduate Student Candidate, UIC Professor Marco Castaldi – CCNY Professor Takoudis, Professor Jursich, and everyone in REU

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