An Optically Accessible Micro-Reactor Josh Baraban, Ellison/Daily Group, CU-Boulder

Pyrolysis Micro-Reactor Upstream: Mass flow rate Pressure 1 mm ID SiC, 300-1700 K by resistive heating, T_wall measured by thermocouple. Heat shield. 0.6–1 mm x 2 cm SiC tube @ 300–1700 K Resistively heated and heat shielded Twall measured by thermocouple Downstream: p ≈ 0 PIMS Matrix IR

CFD Simulations 1200-1500 K, 280 sccm, 0.66 mm x 2.5 cm (Helium) Qi Guan, Kimberly N. Urness, Thomas K. Ormond, Donald E. David, G. Barney Ellison & John W. Daily (2014) The properties of a micro-reactor for the study of the unimolecular decomposition of large molecules, International Reviews in Physical Chemistry, 33:4, 447-487

Spectroscopy & Chemical Kinetics HCCCH2 + C2H2 Spectroscopy & Chemical kinetics - linked Need to look inside Measure rates, Optimize reactor Anisole/C5H5 example - leverage small molecules to study big molecules

In situ Characterization Give quick example of Raman as way to measure temp. – just ratio equation, or maybe simulation/plot too?

Transparent Furnace T. B. Reed. Transparent furnace for vapor crystal growth. In Solid State Research Report, Vol. 1, pg. 21. Lincoln Lab, MIT, 1969.

Elliptical Reflector Detector Hand out YAG reflector after first ellipse. Mention TracePro. ~7.5% accessible.

“Clover” Heater

Heater Test Data

Experimental Overview 278 sccm 5% NO in Ar Vacuum Chamber Mass Flow Controller Baratron Gas Supply and Pumping Backing Pump Drag Pump LIF Monochromator ICCD Heater Thermocouple PID Controller Detection System Transformer Heating and Temperature Control 225 nm Harmonic generation and separation 450 nm Nd:YAG Dye Laser 355 nm HV Pulser Wavemeter Scan Control ICCD Controller Delay Generator Timing Laser System

Imaging Fluorescence

Signal vs. Twall

Comparison with CFD

Pyrolysis of Methyl Nitrite

Review of Scientific Instruments, 87(1):014101, 2016. Acknowledgements Grant Buckingham Jessie Porterfield Kim Urness Tom Ormond G. Barney Ellison Qi Guan John Daily Chris Dreyer NREL David Robichaud Mark Nimlos CIRES Shop Don David Many others J. H. Baraban, D. E. David, G. Barney Ellison, and J. W. Daily. An Optically Accessible Pyrolysis Microreactor. Review of Scientific Instruments, 87(1):014101, 2016.

“Clover” Heater

CFD Simulation

Raman in Quartz

LWIR Cameras

Thermography Warming up, shows inner core of tube nicely

Thermography Cooling – shows all features (screws, wires, etc)