shock tube catalytic activity experiments
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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 - PowerPoint PPT PresentationTRANSCRIPT
Shock Tube Catalytic Activity Experiments
Jerry ZhangUniversity of Southern CaliforniaMechanical Engineering
Overview
What is a shock tube? Adding a catalyst Experiments Results Conclusions
What is a shock tube?
A tube! That fires shock waves Allows for us to study chemical kinetics
Shock Tube Layout
From “Modern Compressible Flow”, John D. Anderson, 3rd Ed, McGraw Hill, 2003
From “Modern Compressible Flow”, John D. Anderson, 3rd Ed, McGraw Hill, 2003
From “Modern Compressible Flow”, John D. Anderson, 3rd Ed, McGraw Hill, 2003
Shock front 1
Contact surfa
ce
23
4
5
Reflected shockRarefaction fan
Reflected rarefaction
Distance x
Tim
e t
Driver DrivenDiaphragm
Head Tail
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
Shock Tube Layout with Catalyst
Platinum
Experiments
Ethane and methane oxidation
With and without catalyst
Temperatures: 1000 K – 1500 K
Minimal change
Reaction Time (without catalyst)
Increased Concentration and Catalysts
Methane Oxidation
Future Work
Perform Further Analysis on Platinum
Study Other Catalysts Rh Pd
Acknowledgements National Science Foundation
– EEC-NSF Grant # 1062943 Professor Kenneth Brezinsky – UIC Aleksandr Fridlyand – Graduate Student, UIC Robyn Smith – Graduate Student Candidate, CCNY Miroslaw Liszka – Graduate Student Candidate, UIC Professor Marco Castaldi – CCNY Professor Takoudis, Professor Jursich, and everyone in
REU