1 Supercritical catalytic cracking of hydrocarbon feeds – Insight into selectivity and stability utilizing a combined kinetic and operando non- linear spectroscopy approach Robert M. Rioux 1 and Sukesh Roy 2 1 Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802 2 Spectral Energies, LLC, Dayton, OH 45431
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Supercritical catalytic cracking of hydrocarbon feeds ...kinetics.nist.gov/RealFuels/macccr/macccr2012/MACCCR_2012_Rioux.pdf1 Supercritical catalytic cracking of hydrocarbon feeds
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1
Supercritical catalytic cracking of hydrocarbon
feeds – Insight into selectivity and stability
utilizing a combined kinetic and operando non-
linear spectroscopy approach
Robert M. Rioux1 and Sukesh Roy2
1Department of Chemical Engineering, The Pennsylvania
State University, University Park, PA 16802 2Spectral Energies, LLC, Dayton, OH 45431
2
BRI Project Objective
Catalysis and
Operando Non-linear
Spectroscopy
Catalytic Cracking is well-studied in the Petroleum Industry
Cracking
Oligomerization
Isomerization
• Product, intermediate and
reaction steps can all be
monitored
• Kinetic information
• Reaction dynamics
• Branching information
• High data bandwidth
allows for fast acquisition
• Transient phenomena
• Time series
• Multi-method approach
• CARS/SRS
• TPLIF
• Imaging capabilities
• Planar fluorescence
• High-resolution
• Label-free
Approach: Ultrafast, nonlinear spectroscopic methods such as coherent
anti-Stokes Raman scattering (CARS) and two-photon fluorescence which
have the sensitivity, selectivity, and spatial resolution required for
studying the molecular scale phenomena.
Challenge: Understand the molecular scale phenomena that govern
catalytic functionality in order to improve catalyst design.
High Peak Powers
Nonlinear Phenomena
Ultrashort Pulses (ps-fs)
Time Dynamics
Spectral Bandwidth
High Repetition Rates (kHz-MHz)
Data-Acquisition Bandwidth
Time Series, PSDs, Correlations
Potential to Simplify NL Spectroscopic Measurements
Pulse-Shaping for Species Selective Detection
Interference-free Atomic Species Measurements
Ultrafast Advantages
Diagnostic Methods for Supercritical Catalytic Cracking
of Hydrocarbon Feeds
Multi-Photon Excitation – Multiple Methods to be employed