Christopher Shaddix

Manager, Combustion Research Facility,
Reacting Flows Department

Short Bio

Dr. Shaddix completed his PhD in Mechanical and Aerospace Engineering from Princeton University in 1993. Then he served as a National Research Council postdoctoral fellow at the National Institute of Standards and Technology (NIST) in Gaithersburg, Maryland. Since 1995 he has been employed as a research scientist at the internationally acclaimed Combustion Research Facility of Sandia National Laboratories in Livermore, California. Dr. Shaddix has expertise in oxy-fuel combustion, the combustion and gasification of coal and biomass, the formation and oxidation of PAH and soot, and the application of laser diagnostics, and has collaborated extensively with university, industrial, and government research partners around the world. He is currently past-chair of the Executive Committee of the Western States Section of the Combustion Institute, chair of the local organizing committee for the 35th International Combustion Symposium, and has authored or co-authored several book chapters and over 50 publications in major, peer-reviewed scientific journals.


Research Interests

  • Laser diagnostics
  • Soot formation
  • Coal and biomass combustion and gasification
  • Oxy-fuel combustion
  • Laminar and turbulent flames
  • Energy systems analysis


  • B.S. Mechanical Engineering, UC Davis, 1988
  • M.A. Mechanical and Aerospace Engineering, Princeton University, 1990
  • Ph.D. Mechanical and Aerospace Engineering, Princeton University, 1993

Awards, Honors AND Memberships

  • Bastress Award, Sandia’s Combustion Research Facility, 2012
  • Honorable Mention Technical Paper, 22nd Annual International Pittsburgh Coal Conference, 2005
  • Richard A. Glenn Award, ACS Div. Fuel Chemistry, Most Outstanding Paper 207th National Mtg, 1994
  • Luigi Crocco Award, for excellence in teaching, Princeton MAE Dept., 1990
  • Grumman Award, for excellence in academic performance, Princeton MAE Dept., 1989
  • University of California Regents Scholar, UC Davis, 1986
  • Most Outstanding Sophomore Award, Phi Kappa Phi, UC Davis, 1985
  • Member of The Combustion Institute, 1989–present
  • Member of Tau Beta Pi, engineering honor society, 1985–present
  • Member of the Executive Committee of the Western States Section of the Combustion Institute, 1997–present (Reprints Chair, Vice-Chair, Chair, and Past Chair)

Selected Publications & Patents

E.S. Hecht, C.R. Shaddix, M. Geier, A. Molina, B.S. Haynes, “Effect of CO2 and Steam Gasification Reactions on the Oxy-Combustion of Pulverized Coal Char,” Combustion and Flame 159: 3437-3447 (2012).

C.R. Shaddix, “Coal combustion, gasification, and beyond: Developing new technologies for a changing world,” Combustion and Flame 159 (2012) 3003-3006.

C.R. Shaddix, A. Molina, “Ignition, flame stability, and char combustion in oxy-fuel combustion,” in Oxy-fuel combustion for power generation and carbon dioxide (CO2) capture (L. Zheng, Ed.), Woodhead Publishing Ltd., Cambridge UK, 2011.

C.R. Shaddix, T.C. Williams, “Soot Structure and Dimensionless Extinction Coefficient in Diffusion Flames: Implications for Index of Refraction,” in Combustion-Generated Fine Carbonaceous Particles (H. Bockhorn, A. D’Anna, A.F. Sarofim, H. Wang, Eds.), Karlsruhe University Press, 2009.

C.R. Shaddix, A. Molina, “Particle Imaging of Ignition and Devolatilization of Pulverized Coal during Oxy-Fuel Combustion,” Proceedings of the Comb. Institute 32:2091-2098 (2009).

T.C. Williams, C.R. Shaddix, R.W. Schefer, “Effect of Syngas Composition and CO2-Diluted Oxygen on Performance of a Premixed Swirl-Stabilized Combustor,” Combustion Science and Technology180:64-88 (2008).

A. Molina, C.R. Shaddix, “Ignition and Devolatilization of Pulverized Bituminous Coal Particles during Oxygen/Carbon Dioxide Coal Combustion,” Proceedings of the Comb. Institute 31:1905-1912 (2007).

J.J. Murphy, C.R. Shaddix, “Soot Property Measurements in a Two-Meter Diameter JP-8 Pool Fire,”Combustion Science and Technology 178:865-894 (2006).

J.J. Murphy, C.R. Shaddix, “The Combustion Kinetics of Coal Chars in Oxygen-Enriched Environments,” Combustion and Flame 144:710-729 (2006).

J.J. Murphy, C.R. Shaddix, “Influence of Scattering and Probe Volume Heterogeneity on Soot Measurements using Optical Pyrometry,” Combustion and Flame 143:1–10 (2005).

C.R. Shaddix, T.C. Williams, L.G. Blevins, R.W. Schefer, “Flame Structure of Steady and Pulsed Sooting Inverse Jet Diffusion Flames,” Proceedings of the Comb. Institute 30:1501–1508 (2005).

R.J. Santoro, C.R. Shaddix, “Laser-Induced Incandescence,” pp. 252-286, in Applied Combustion Diagnostics, (K. Kohse-Höinghaus and J.B. Jeffries, Eds.), Taylor and Francis, New York, 2002.

C.R. Shaddix, “Correcting Thermocouple Measurements for Radiation Loss:  A Critical Review,” HTD99-282, Proc. of 33rd National Heat Transfer Conference, ASME, New York, 1999.

C.R. Shaddix and P.J. Tennison, “Effects of Char Content and Simple Additives on Biomass Pyrolysis Oil Droplet Combustion,” Proceedings of the Comb. Institute 27:1907–1914 (1998).

C.R. Shaddix and K.C. Smyth, “Laser-Induced Incandescence Measurements of Soot Production in Steady and Flickering Methane, Propane, and Ethylene Diffusion Flames,” Combustion and Flame107: 418–452 (1996).

C.R. Shaddix, K. Brezinsky, and I. Glassman, “Oxidation of 1-Methylnaphthalene,” Proceedings of the Comb. Institute 24:683–690 (1992).


Sandia National Laboratories
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Livermore, CA 94551-0969
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