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Studies of the Product Formation of Biomass Pyrolysis Using Spectroscopic Techniques. Sam Burt. Dr. Terry Meyer Dr. Joseph Miller Chloe Dedic. Outline. Motivation and objectives Approach, methods Current Status of work/current results Work in progress, planned work and timeline.
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Studies of the Product Formation of Biomass Pyrolysis Using Spectroscopic Techniques Sam Burt Dr. Terry Meyer Dr. Joseph Miller Chloe Dedic
Outline • Motivation and objectives • Approach, methods • Current Status of work/current results • Work in progress, planned work and timeline
Biomass Fast Pyrolysis • Phenols • Guess-and-check
Motivation/Objectives • Expense of Upgrading Fuels • Dangers of Phenols • How and when are phenols given off? • How and when do phenols condense? • Could it be possible to remove valuable and/or dangerous compounds before condensation?
Two-Photon Fluorescence • Energetic addition of two photons • Very Rare • Requires ultrafast laser, compact sample volume • Low background • Detailed view of sample
Phenol • Max peak 254-272 nm • Constant shape with dilution • Beer’s Law • I/Io= 10-εlc • A = εlc
Guaiacol • Max peak 233-238 nm • Constant shape with dilution
2-Methoxy-4-vinylphenol • Max peak at about 242 nm • Secondary peak around 310 nm
Coherent Anti-Stokes Raman Scattering (CARS) Spectroscopy • Greater resolution than TPF • Guaiacol Raman spectrum • Our technique • Structure of phenol dimer, trimer E1 ? E0
Optical Parametric Amplifier (OPA) • Tunes frequency for our benefit • Fundamental wavelength = 798 nm • Doubled frequency 580-735 nm • Perfect for CARS • Phenol – 617 nm • Guaiacol – 634 nm • Acceptable for TPF • Phenol – 580 nm • Guaiacol – 580 nm • 2-methoxy-4-vinylphenol – 620 nm
Future Timeline • 7/9 • Finish UV/vis • Design and set up hot plate and container below CARS focal point • Collect hybrid CARS data for phenol compounds • 7/16 • Investigate two-photon fluorescence • Record high speed video of particle ejection • 7/23 • Collect and analyze more hybrid CARS data • 7/30 • Finish data analysis and make poster