Skip to main content
Photo of Kristiina Iisa

Kristiina Iisa

Researcher IV-Chemical Engineering | 303-384-7853
Orcid ID

Research Interests

  • Thermochemical biorefineries

  • Catalytic fast pyrolysis for the production of transportation fuels

  • Upgrading of pyrolysis oils

  • Biomass gasification

Areas of Expertise

  • Pyrolysis and gasification

  • Chemical reaction engineering

  • Heterogeneous catalysis

  • Gas-solid reactions


  • Ph.D., Chemical Engineering, Åbo Akademi University, Finland

  • M.Sc., Chemical Engineering, Helsinki University of Technology, Finland

Professional Experience

  • Senior Engineer, National Renewable Energy Laboratory, 2008–present

  • Principal Research Engineer, Georgia Institute of Technology, 20052008

  • Research Associate, Chalmers University of Technology, 20012004

  • Associate Professor, Institute of Paper Science and Technology, 20002001

  • Assistant Professor, Institute of Paper Science and Technology, 19972000

  • Assistant Professor, Oregon State University, 19931996

  • Faculty Research Assistant, Oregon State University, 19921993

  • Research Assistant, Åbo Akademi University, Finland, 19871992

  • Research & Development Engineer, Valmet, Finland, 19831987

Featured Publications

  1. "In Situ and ex Situ Catalytic Pyrolysis of Pine in a Bench-Scale Fluidized Bed Reactor System," Energy & Fuels (2016)

  2. "Catalytic Pyrolysis of Pine over HZSM-5 with Different Binders," Topics in Catalysis (2016)

  3. "Hydrotreating the Organic Fraction of Biomass Pyrolysis Oil to a Refinery Intermediate," Energy & Fuels (2015)

  4. "Pyrolysis of Woody Residue Feedstocks: Upgrading of Bio-oils from Mountain-Pine-Beetle-Killed Trees and Hog Fuel," Energy & Fuels (2014)

  5. "Effect of Temperature, Pressure, and Residence Time on Pyrolysis of Pine in an Entrained Flow Reactor," Energy & Fuels (2014)

  6. "Real-Time Monitoring of the Deactivation of HZSM-5 during Upgrading of Pine Pyrolysis Vapors," Green Chemistry (2014)

  7. "Hydrocarbon Liquid Production from Biomass via Hot-Vapor-Filtered Fast Pyrolysis and Catalytic Hydroprocessing of the Bio-oil," Energy & Fuels (2014)

  8. "Evaluate Impact of Catalyst Type on Oil Yield and Hydrogen Consumption from Mild Hydrotreating," Energy & Fuels (2014)

  9. "High-speed Imaging of Biomass Particles Heated with a Laser," Journal of Analytical and Applied Pyrolysis (2013)

  10. "Chemical Characterization and Water Content Determination of Bio-Oils Obtained from Various Biomass Species Using 31P NMR Spectroscopy," Biofuels (2012)

  11. "Analysis of Oxygenated Compounds in Hydrotreated Biomass Fast Pyrolysis Oil Distillate Fractions," Energy & Fuels (2011)