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Energy and Environment Directorate

Vanessa Dagle

Vanessa Dagle

Pacific Northwest National Laboratory
PO Box 999
Richland, WA 99352
(509) 371-6510


Dr. Dagle came to the PNNL in 2007 and joined the Hydrocarbon Processing Group in 2009. She has over 10 years of experience in the area of heterogeneous catalysis and chemical process development. Her current research activities include the conversion of ethanol to butadiene and/ or butenes, ring-opening of (hydrotreated) bio- oils and the conversion of 2,3-butanediol to olefins mixture. Experience with other various catalytic chemical processes include: thermochemical conversion of syngas to fuels, catalytic tar and methane reforming for biomass derived syngas clean up, steam reforming of hydrocarbons and alcohols, selective CO methanation, water-gas-shift catalysis. Her work has benefited clientele in both the government and private industry arena and has resulted in numerous journal articles and presentations.

Research Interests

  • Biomass conversion to fuels and chemicals
  • Ethanol conversion to butadiene and/ or butenes
  • 2,3-Butanediol conversion to olefins mixture
  • Ring-opening of (hydrotreated) bio-oils
  • Methane conversion
  • Syngas to distillate fuels
  • Steam reforming of alcohols, methane, benzene

Education and Credentials

  • Ph.D. in Physical, Analytical and Theoretical Chemistry: (Laboratoire Catalyse et Spectroscopie) Caen, France
  • Master Degree II in Chemistry; DEA, University of Caen & Engineering school (ENSI), France
  • Master Degree I in Chemistry; Maitrise, Department of Chemistry, University of Caen, France

Awards and Recognitions

  • Recognition and Rewards Honoree, Key contributor award – Battelle 2009
  • Diplome d’Etudes Approfondies, 1 year grant-University of Caen, France, 2002-2003
  • Bourse MENRT, 3 years grant, Caen, France 2003-2006

PNNL Patents

PNNL Publications


  • Affandy M., C. Zhu, M.S. Swita, B.A. Hofstad, D.J. Cronin, R.T. Elander, and V. Dagle. 2023. "Production and Catalytic Upgrading of 2,3-Butanediol Fermentation Broth into Sustainable Aviation Fuel Blendstock and Fuel Properties Measurement." Fuel 333, no. part 1:Art. No. 126328. PNNL-SA-169712. doi:10.1016/j.fuel.2022.126328
  • Affandy M., V. Dagle, and R.A. Dagle. 2023. Direct conversion of syngas to lower olefins precursors of jet fuel and chemicals. PNNL-34846. Richland, WA: Pacific Northwest National Laboratory. Direct conversion of syngas to lower olefins precursors of jet fuel and chemicals
  • Dagle R.A., and V. Dagle. 2023. Production of 1,3-Butadiene from Renewable Oxygenated Feedstocks (Abstract) - CRADA 560. PNNL-33887. Richland, WA: Pacific Northwest National Laboratory. Production of 1,3-Butadiene from Renewable Oxygenated Feedstocks (Abstract) - CRADA 560
  • Dagle V., G.B. Collinge, M. Rahman, A.D. Winkelman, W. Hu, J.Z. Hu, and L. Kovarik, et al. 2023. "Single-step conversion of ethanol into n-butene-rich olefins over metal catalysts supported on ZrO2-SiO2 mixed oxides." Applied Catalysis B: Environmental 331. PNNL-SA-181402. doi:10.1016/j.apcatb.2023.122707



  • Lin F., V. Dagle, A.D. Winkelman, M.H. Engelhard, L. Kovarik, Y. Wang, and Y. Wang, et al. 2021. "Understanding the Deactivation of Ag-ZrO2/SiO2 Catalysts for the Single-Step Conversion of Ethanol to Butenes." ChemCatChem 13, no. 3:999-1008. PNNL-SA-158105. doi:10.1002/cctc.202001488


  • Akhade S.A., A.D. Winkelman, V. Dagle, L. Kovarik, S.F. Yuk, M. Lee, and J. Zhang, et al. 2020. "Influence of Ag metal dispersion on the thermal conversion of ethanol to butadiene over Ag-ZrO2/SiO2 catalysts." Journal of Catalysis 386. PNNL-SA-143386. doi:10.1016/j.jcat.2020.03.030
  • Dagle R.A., A.D. Winkelman, K. Kallupalayam Ramasamy, V. Dagle, and R.S. Weber. 2020. "Ethanol as a renewable building block for fuels and chemicals." Industrial and Engineering Chemistry Research 59, no. 11:4843-4853. PNNL-SA-148314. doi:10.1021/acs.iecr.9b05729
  • Dagle R.A., V. Dagle, and J. Saavedra Lopez. 2020. Improved Value of the Gasoline and Fuel Oil Co-Product Fractions Generated by the PNNL/LanzaTech Alcohol-to-Jet Process - CRADA 394 (Final Report). PNNL-30831. Richland, WA: Pacific Northwest National Laboratory. Improved Value of the Gasoline and Fuel Oil Co-Product Fractions Generated by the PNNL/LanzaTech Alcohol-to-Jet Process - CRADA 394 (Final Report)
  • Dagle R.A., V. Dagle, M.D. Bearden, J.D. Holladay, T.R. Krause, and S. Ahmed. 2020. "Hydrogen and Solid Carbon Products from Natural Gas: A Review of Process Requirements, Current Technologies, Market Analysis, and Preliminary Techno Economic Assessment." In Direct Natural Gas Conversion to Value-Added Chemicals, edited by J. Hu and D Shekhawat. Oxfordshire:Taylor & Francis Group. PNNL-SA-134166. doi:10.1201/9780429022852
  • Dagle V., A.D. Winkelman, N.R. Jaegers, J. Saavedra Lopez, J.Z. Hu, M.H. Engelhard, and S. Habas, et al. 2020. "Single-Step Conversion of Ethanol to n-Butene over Ag-ZrO2/SiO2 Catalysts." ACS Catalysis 10, no. 18:10602-10613. PNNL-SA-151691. doi:10.1021/acscatal.0c02235
  • Dagle V., J. Saavedra Lopez, A.R. Cooper, J. Luecke, M.S. Swita, R.A. Dagle, and D.J. Gaspar. 2020. "Production and Fuel properties of Iso-Olefins with Controlled Molecular Structure and Obtained from Butene Oligomerization." Fuel 277. PNNL-SA-152680. doi:10.1016/j.fuel.2020.118147


  • Bharadwaj V.S., B. Pecha, L. Bu, V. Dagle, R.A. Dagle, and P. Ciesielski. 2019. "Multi-scale simulation of reaction, transport and deactivation in SBA-16 supported catalyst for the conversion of ethanol to butadiene." Catalysis Today 338. PNNL-SA-139387. doi:10.1016/j.cattod.2019.05.042
  • Dagle V., R.A. Dagle, L. Kovarik, F. Baddour, S. Habas, and R.T. Elander. 2019. "Single-step Conversion of Methyl Ethyl Ketone to Olefins over ZnxZryOz Catalysts in Water." ChemCatChem 11, no. 15:3393-3400. PNNL-SA-140968. doi:10.1002/cctc.201900292
  • Davidson S.D., J.A. Lopez-Ruiz, M.D. Flake, A.R. Cooper, Y. Elkasabi, M. Tomasi Morgano, and V. Dagle, et al. 2019. "Cleanup and Conversion of Biomass Liquefaction Aqueous Phase to C3-C5 Olefins over ZnxZryOz Catalyst." Catalysts 9, no. 11:923. PNNL-SA-148421. doi:10.3390/catal9110923
  • Lu Y., J. Wang, L. Yu, L. Kovarik, X. Zhang, A.S. Hoffman, and A. Gallo, et al. 2019. "Identification of the Active Complex for CO Oxidation Over Single-Atom Ir-on-MgAl2O4 Catalysts." Nature Catalysis 2, no. 2:149-156. PNNL-SA-138518. doi:10.1038/s41929-018-0192-4
  • Saavedra Lopez J., R.A. Dagle, V. Dagle, C.D. Smith, and K.O. Albrecht. 2019. "Oligomerization of ethanol-derived propene and isobutene mixtures to transportation fuels: catalyst and process considerations." Catalysis Science & Technology 9, no. 5:1117-1131. PNNL-SA-135575. doi:10.1039/C8CY02297F
  • Saavedra Lopez J., V. Dagle, C.A. Deshmane, L. Kovarik, R.S. Wegeng, and R.A. Dagle. 2019. "Methane and Ethane Steam Reforming over MgAl2O4-Supported Rh and Ir Catalysts: Catalytic Implications for Natural Gas Reforming Application." Catalysts 9, no. 10:Article No. 801. PNNL-SA-146376. doi:10.3390/catal9100801


  • Dagle V., M.D. Flake, T.L. Lemmon, J. Saavedra Lopez, L. Kovarik, and R.A. Dagle. 2018. "Effect of the SiO2 Support on the Catalytic Performance of Ag/ZrO2/SiO2 Catalysts for the Single-Bed Production of Butadiene from Ethanol." Applied Catalysis B: Environmental 236. PNNL-SA-128543. doi:10.1016/j.apcatb.2018.05.055
  • Kothandaraman J., R.A. Dagle, V. Dagle, S.D. Davidson, E.D. Walter, S.D. Burton, and D.W. Hoyt, et al. 2018. "Condensed-Phase Low Temperature Heterogeneous Hydrogenation of CO2 to Methanol." Catalysis Science & Technology 8, no. 19:5098-5103. PNNL-SA-133245. doi:10.1039/C8CY00997J


  • Davidson S.D., K.A. Spies, D. Mei, L. Kovarik, I.V. Kutnyakov, X.S. Li, and V. Dagle, et al. 2017. "Steam Reforming of Acetic Acid over Co-supported Catalysts: Coupling Ketonization for Greater Stability." ACS Sustainable Chemistry & Engineering 5, no. 10:9136-9149. PNNL-SA-125545. doi:10.1021/acssuschemeng.7b02052


  • Lebarbier V.M., C.D. Smith, M.D. Flake, K.O. Albrecht, M.J. Gray, K.K. Ramasamy, and R.A. Dagle. 2016. "Integrated Process for the Catalytic Conversion of Biomass-Derived Syngas into Transportation Fuels." Green Chemistry 18, no. 7:1880-1891. PNNL-SA-113248. doi:10.1039/c5gc02298c
  • Lebarbier V.M., R.A. Dagle, L. Kovarik, A. Genc, Y. Wang, M.E. Bowden, and H. Wan, et al. 2016. "Steam Reforming of Hydrocarbons from Biomass-Derived Syngas over MgAl2O4-Supported Transition Metals and Bimetallic IrNi Catalysts." Applied Catalysis B: Environmental 184. PNNL-24262. doi:10.1016/j.apcatb.2015.11.022
  • Smith C.D., V.M. Lebarbier, M.D. Flake, K.K. Ramasamy, L. Kovarik, M.E. Bowden, and T. Onfroy, et al. 2016. "Conversion of Syngas-Derived C2+ Mixed Oxygenates to C3-C5 Olefins over ZnxZryOz Mixed Oxides Catalysts." Catalysis Today 6, no. 7:2325-2316. PNNL-SA-111860. doi:10.1039/C5CY01261A
  • Xing R., V.M. Lebarbier, M.D. Flake, L. Kovarik, K.O. Albrecht, C.A. Deshmane, and R.A. Dagle. 2016. "Steam Reforming of Fast Pyrolysis-Derived Aqueous Phase Oxygenates over Co, Ni, and Rh Metals Supported on MgAl2O4." Catalysis Today 269. PNNL-SA-111967. doi:10.1016/j.cattod.2015.11.046


  • Mei D., V.M. Lebarbier, R. Xing, K.O. Albrecht, and R.A. Dagle. 2015. "Steam Reforming of Ethylene Glycol over MgAl2O4 Supported Rh, Ni, and Co Catalysts." ACS Catalysis 6, no. 1:315-325. PNNL-SA-112396. doi:10.1021/acscatal.5b01666


  • Dagle R.A., J.A. Lizarazo Adarme, V.M. Lebarbier, M.J. Gray, J.F. White, D.L. King, and D.R. Palo. 2014. "Syngas Conversion to Gasoline-Range Hydrocarbons over Pd/ZnO/Al2O3 and ZSM-5 Composite Catalyst System." Fuel Processing Technology 123. PNNL-SA-86935. doi:10.1016/j.fuproc.2014.01.041
  • Lebarbier Dagel V.M., R.A. Dagle, J. Li, C.A. Deshmane, C.E. Taylor, X. Bao, and Y. Wang. 2014. "Direct Conversion of Syngas-to-Hydrocarbons over Higher Alcohols Synthesis Catalysts Mixed with HZSM-5." Industrial and Engineering Chemistry Research 53, no. 36:13928-13934. PNNL-SA-103407. doi:10.1021/ie502425d
  • Lebarbier V.M., R.A. Dagle, L. Kovarik, K.O. Albrecht, X.S. Li, L. Li, and C.E. Taylor, et al. 2014. "Sorption-Enhanced Synthetic Natural Gas (SNG) Production from Syngas: A Novel Process Combining CO Methanation, Water-Gas Shift, and CO2 Capture." Applied Catalysis. B, Environmental 144. PNNL-SA-90830. doi:10.1016/j.apcatb.2013.06.034
  • Mei D., V.A. Glezakou, V.M. Lebarbier, L. Kovarik, H. Wan, K.O. Albrecht, and M.A. Gerber, et al. 2014. "Highly Active and Stable MgAl2O4 Supported Rh and Ir Catalysts for Methane Steam Reforming: A Combined Experimental and Theoretical Study." Journal of Catalysis 316. PNNL-SA-99099. doi:10.1016/j.jcat.2014.04.021


  • Dagle R.A., V.M. Lebarbier, K.O. Albrecht, J. Li, C.E. Taylor, X. Bao, and Y. Wang. 2013. "Syngas Conversion to Hydrocarbon Fuels through Mixed Alcohol Intermediates." In 23rd North American Catalysis Society Meeting, June 2-7, 2013, Louisville, Kentucky, Paper No. P-M-BRC-147. N/A:North American Catalysis Society. PNNL-SA-92427.
  • Howard C.J., R.A. Dagle, V.M. Lebarbier, J.E. Rainbolt, L. Li, and D.L. King. 2013. "Progress toward Biomass and Coal-Derived Syngas Warm Cleanup: Proof-of-Concept Process Demonstration of Multicontaminant Removal for Biomass Application." Industrial and Engineering Chemistry Research 52, no. 24:8125-8138. PNNL-SA-92772. doi:10.1021/ie4004927
  • Liu C., A.M. Karim, V.M. Lebarbier, D. Mei, and Y. Wang. 2013. "Vapor phase ketonization of acetic acid on ceria based metal oxides." Topics in Catalysis 56, no. 18-20:1782-1789. PNNL-SA-93130. doi:10.1007/s11244-013-0114-2
  • Mei D., V.M. Lebarbier, R.J. Rousseau, V.A. Glezakou, K.O. Albrecht, L. Kovarik, and M.D. Flake, et al. 2013. "Comparative Investigation of Benzene Steam Reforming over Spinel Supported Rh and Ir Catalysts." ACS Catalysis 3, no. 6:1133-1143. PNNL-SA-93222. doi:10.1021/cs4000427


  • Lebarbier V.M., R.A. Dagle, L. Kovarik, J.A. Lizarazo Adarme, D.L. King, and D.R. Palo. 2012. "Synthesis of Methanol and Dimethyl Ether from Syngas over Pd/ZnO/Al2O3 Catalysts." Catalysis Science & Technology 2, no. 10:2116-2127. PNNL-SA-85225. doi:10.1039/C2CY20315D


  • Lebarbier V.M., A.M. Karim, M.H. Engelhard, Y. Wu, B. Xu, E.J. Petersen, and A.K. Datye, et al. 2011. "The Effect of Zn Addition on the Oxidation State of Cobalt in Co/ZrO2 Catalysts." ChemSusChem 4, no. 11:1679-1684. PNNL-SA-77348. doi:10.1002/cssc.201100240
  • Lebarbier V.M., D. Mei, D. Kim, A. Andersen, J.L. Male, J.E. Holladay, and R.J. Rousseau, et al. 2011. "Effects of La2O3 on the mixed higher alcohols synthesis from syngas over Co catalysts: A combined theoretical and experimental study." Journal of Physical Chemistry C 115, no. 35:17440-17451. PNNL-SA-79514. doi:10.1021/jp204003q


  • Halevi B., E. Peterson, A. DelaRiva, E. Jeroro, V.M. Lebarbier, Y. Wang, and J.M. Vohs, et al. 2010. "Aerosol-Derived Bimetallic Alloy Powders: Bridging the Gap." Journal of Physical Chemistry C 114, no. 40:17181-17190. PNNL-SA-76995. doi:10.1021/jp103967x
  • Lebarbier V., R.A. Dagle, A.K. Datye, and Y. Wang. 2010. "The effect of PdZn particle size on reverse-water-gas-shift reaction." Applied Catalysis. A, General 379, no. 1-2:3-6. PNNL-SA-68800.


  • Hyman M.P., V.M. Lebarbier, Y. Wang, A.K. Datye, and J.M. Vohs. 2009. "A Comparison of the Reactivity of Pd Supported on ZnO(10(1)over-bar0) and ZnO(0001)." Journal of Physical Chemistry C 113, no. 17:7251-7259. PNNL-SA-66002.


  • Conant T., A.M. Karim, V.M. Lebarbier, Y. Wang, F. Girgsdies, R. Schlogl, and A.K. Datye. 2008. "Stability of bimetallic Pd-Zn catalysts for the steam reforming of methanol." Journal of Catalysis 257, no. 1:64-70. PNNL-SA-61944. doi:10.1016/j.jcat.2008.04.018
  • Lebarbier V.M., R.A. Dagle, T. Conant, J.M. Vohs, A.K. Datye, and Y. Wang. 2008. "CO/FTIR Spectroscopic Characterization of Pd/ZnO/Al2O3 Catalysts for Methanol Steam Reforming." Catalysis Letters 122, no. 3-4:223-227. PNNL-SA-58426. doi:10.1007/s10562-008-9407-7


  • Jeroro E., V.M. Lebarbier, A. Datye, Y. Wang, and J.M. Vohs. 2007. "Interaction of CO with Surface PdZn Alloys." Surface Science 601, no. 23:5546-5554. PNNL-SA-56194. doi:10.1016/j.susc.2007.09.031

Energy and Environment

Core Research Areas