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Charles Freeman

Charles Freeman

Pacific Northwest National Laboratory
PO Box 999
Richland, WA 99352

PNNL Patents

PNNL Publications


  • Heldebrant DJ, PK Koech, RJ Rousseau, VA Glezakou, D Cantu Cantu, D Malhotra, F Zheng, GA Whyatt, CJ Freeman, and MD Bearden. 2017. "Are Water-Lean Solvent Systems Viable for Post-Combustion CO2 Capture?" Energy Procedia 114:756-763.  doi:10.1016/j.egypro.2017.03.1218
  • Cantu Cantu D, D Malhotra, PK Koech, DJ Heldebrant, F Zheng, CJ Freeman, RJ Rousseau, and VA Glezakou. 2017. "Integrated Solvent Design for CO2 Capture and Viscosity Tuning." Energy Procedia 114:726-734.  doi:10.1016/j.egypro.2017.03.1215
  • Davidson CL, DJ Heldebrant, MD Bearden, JA Horner, and CJ Freeman. 2017. "Enabling CCS via low-temperature geothermal energy integration for fossil-fired power generation." Energy Procedia 114:6448-6454.  doi:10.1016/j.egypro.2017.03.1781
  • Whyatt GA, A Zwoster, F Zheng, RJ Perry, BR Wood, I Spiry, CJ Freeman, and DJ Heldebrant. 2017. "Measuring CO2 and N2O Mass Transfer into GAP-1 CO2-Capture Solvents at Varied Water Loadings." Industrial Engineering Chemistry Research 56(16):4830-4836.  doi:10.1021/acs.iecr.7b00193


  • Cantu Cantu D, D Malhotra, PK Koech, DJ Heldebrant, F Zheng, CJ Freeman, RJ Rousseau, and VA Glezakou. 2016. "Structure-Property Reduced Order Model for Viscosity Prediction in Single-Component CO2- Binding Organic Liquids." Green Chemistry 18(22):10.1039/C6GC02203K.  doi:10.1039/c6gc02203k
  • Cantu Cantu D, JT Lee, MS Lee, DJ Heldebrant, PK Koech, CJ Freeman, RJ Rousseau, and VA Glezakou. 2016. "Dynamic Acid/Base Equilibrium in Single Component Switchable Ionic Liquids and Consequences on Viscosity." Journal of Physical Chemistry Letters 7(9):1646-1652.  doi:10.1021/acs.jpclett.6b00395
  • Whyatt GA, CJ Freeman, A Zwoster, and DJ Heldebrant. 2016. "Measuring Nitrous Oxide Mass Transfer into Non-Aqueous CO2BOL CO2 Capture Solvents." Industrial and Engineering Chemistry Research 55(16):4720-4725.  doi:10.1021/acs.iecr.6b00390
  • Zheng F, DJ Heldebrant, PM Mathias, PK Koech, M Bhakta, CJ Freeman, MD Bearden, and A Zwoster. 2016. "Bench-Scale Testing and Process Performance Projections of CO2 Capture by CO2-Binding Organic Liquids (CO2BOLs) With and Without Polarity-Swing-Assisted Regeneration." Energy and Fuels 30(2):1192-1203.  doi:10.1021/acs.energyfuels.5b02437


  • Fernandez CA, SK Nune, HV Annapureddy, LX Dang, BP McGrail, F Zheng, E Polikarpov, DL King, CJ Freeman, and KP Brooks. 2015. "Hydrophobic and moisture-stable metal-organic frameworks." Dalton Transactions 44(30):13490 - 13497.  doi:10.1039/C5DT00606F
  • Mathias PM, F Zheng, DJ Heldebrant, A Zwoster, GA Whyatt, CJ Freeman, MD Bearden, and PK Koech. 2015. "Measuring the Absorption Rate of CO2 in Nonaqueous CO2-Binding Organic Liquid Solvents with a Wetted-Wall Apparatus." ChemSusChem 8(21):3617-3625.  doi:10.1002/cssc.201500288


  • Heldebrant DJ, VA Glezakou, PK Koech, PM Mathias, D Cantu Cantu, RJ Rousseau, D Malhotra, M Bhakta, MD Bearden, CJ Freeman, and F Zheng. 2014. "Evaluating transformational solvent systems for post-combustion CO2 separations." Energy Procedia 63:8144-8152.  doi:10.1016/j.egypro.2015.12.336


  • Zhang J, IV Kutnyakov, PK Koech, A Zwoster, CJ Howard, F Zheng, CJ Freeman, and DJ Heldebrant. 2013. "CO2-Binding-Organic-Liquids-Enhanced CO2 Capture using Polarity-Swing-Assisted Regeneration." Energy Procedia 37:285-291.  doi:10.1016/j.egypro.2013.05.113
  • Freeman CJ, SB Jones, AB Padmaperuma, DM Santosa, C Valkenburg, and J Shinn. 2013. Initial Assessment of U.S. Refineries for Purposes of Potential Bio-Based Oil InsertionsPNNL-22432, Pacific Northwest National Laboratory, Richland, WA. 
  • Mathias PM, K Afshar, F Zheng, MD Bearden, CJ Freeman, T Andrea, PK Koech, IV Kutnyakov, A Zwoster, AR Smith, PG Jessop, OG Nik, and DJ Heldebrant. 2013. "Improving the Regeneration of CO2-Binding Organic Liquids with a Polarity Change." Energy and Environmental Science 6(7):2233-2242.  doi:10.1039/C3EE41016A
  • Mathias PM, LV Jasperson, D VonNiederhausern, MD Bearden, PK Koech, CJ Freeman, and DJ Heldebrant. 2013. "Assessing Anhydrous Tertiary Alkanolamines for High-Pressure Gas Purifications." Industrial and Engineering Chemistry Research 52(49):17562-17572.  doi:10.1021/ie4020974


  • McGrail BP, CJ Freeman, CF Brown, EC Sullivan, SK White, S Reddy, R Garber, D Tobin, J Gilmartin, and E Steffensen. 2012. "Overcoming Business Model Uncertainty in a Carbon Dioxide Capture and Sequestration Project: Case Study at the Boise White Paper Mill." International Journal of Greenhouse Gas Control 9:91-102.  doi:10.1016/j.ijggc.2012.03.009


  • Cabe JE, DA King, and CJ Freeman. 2011. "Post Combustion Test Bed Development." Carbon Capture Journal Nov/Dec(24):Online. 
  • Heldebrant DJ, PK Koech, JE Rainbolt, F Zheng, TD Smurthwaite, CJ Freeman, M Oss, and I Leito. 2011. "Performance of Single-Component CO2-Binding Organic Liquids (CO2BOLs) For Post Combustion CO2 Capture." Chemical Engineering Journal 171(3):794-800.  doi:10.1016/j.cej.2011.02.012
  • Widder SH, RS Butner, ML Elliott, and CJ Freeman. 2011. Sustainability Assessment of Coal-Fired Power Plants with Carbon Capture and StoragePNNL-20933, Pacific Northwest National Laboratory, Richland, WA. 

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