Alex is a chemical engineer at the National Renewable Energy Laboratory's National Bioenergy Center.
As a member of the biochemical process R&D section, Alex is currently working on developing an integrated process design for the production of ethanol. His projects include:
- Optimizing enzymatic hydrolysis of cellulose and fermentation of hemicellulose and cellulose and developing a cost effective process.
- Developing mass balances and error analysis for the entire ethanol production process in order to better understand where the feed ends up and what the true errors in measurements and calculations are.
- Developing pretreatment and enzymatic hydrolysis processes for producing advanced biofuels with industrial partners.
Alex's research areas of interest are:
- Integrated biomass processing
- High solids biomass conversion
- Fermentation development
- Separation processes
- Measurement uncertainty
- Process scale-up
Ph.D., Chemical Engineering, University of Notre Dame, 2004–2009
M.S., Chemical Engineering, University of Notre Dame, 2004–2008
B.S., Chemical Engineering, Syracuse University, 2000–2004
Engineer II, National Renewable Energy Laboratory, National Bioenergy Center, 2009–present
Research Aid, Argonne National Laboratory, Energy Systems Division, Process Technology Research, Summer 2006
Publications and Presentations
Peer reviewed publications:
Chapeaux, A.; Dowe, N.; Schell, D. "Optimizing a Separate Hemicellulosic and Cellulosic Conversion Process Design for Producing Ethanol." Manuscript in Preparation.
Chapeaux, A.; Ronan, T. S.; Brennecke, J. F. "Separation of Water and Alcohols using Hydrophobic Ionic Liquids." Manuscript in Preparation.
Chapeaux, A.; Brennecke, J. F. "Measurements of Excess Enthalpies for Ionic Liquid + Alcohol Mixtures and Calculations of Heats of Vaporization of Alcohols in Ionic Liquids." Manuscript in Preparation.
Chapeaux, A.; Andrews, N.; Brennecke, J. "Liquid-Liquid Behavior of Ionic Liquids with Water and 1-hexanol." Journal of Chemical and Engineering Data. Manuscript in Preparation.
Chapeaux, A.; Anderson, J.; Aki, S. N. V. K.; Brennecke, J. F. "Solubility of Oxygen and Oxygen/Carbon Dioxide Mixtures in 1–hexyl–3-methylimidazolium bis(trifluoromethylsulfonate)imide." Industrial & Engineering Chemistry Research. Submitted Manuscript.
Simoni, L. D.; Chapeaux, A.; Brennecke, J. F.; Stadtherr, M. A. (2010). "Extraction of Biofuels and Biofeedstocks from Aqueous Solutions Using Ionic Liquids." Computers and Chemical Engineering. In Press.
Simoni, L. D.; Chapeaux, A.; Brennecke, J. F.; Stadtherr, M. A. (2009). "Asymmetric Framework for Predicting Liquid-Liquid Equilibrium of Ionic Liquid-Mixed-Solvent Systems. 2. Prediction of Ternary Systems." Industrial & Engineering Chemistry Research (48); pp. 7257-7265.
Chapeaux, A.; Simoni, L. D.; Ronan, T. S.; Stadtherr, M. A.; Brennecke, J. F. (2008). "Extraction of Alcohols from Water using 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide." Green Chemistry (10); pp. 1301-1306.
Chapeaux, A.; Simoni, L. D.; Stadtherr, M. A.; Brennecke, J. F. (2007). "Liquid Phase Behavior of Ionic Liquids with Water and 1-Octanol and Modeling of 1-Octanol/Water Partition Coefficients." Journal of Chemical & Engineering Data (52); pp. 2462-2467.
Presentations at national and international meetings:
- 32nd Symposium on Biotechnology for Fuels and Chemicals (2010)
- AIChE 2008 Annual Meeting (2008)
- 2nd Congress on Ionic Liquids (2007)
Biochemical Process R&D
National Bioenergy Center
National Renewable Energy Laboratory
15013 Denver West Parkway, MS3511
Golden, CO 80401