Susan Michelle Stagg-Williams

School of Engineering - Chemical & Petroleum Engineering
Professor
University of Kansas Faculty Athletics Representative Director Undergraduate Studies, C&PE
Primary office:
785-864-2919
Learned Hall
Room 4142
University of Kansas
1530 West 15th Street
Lawrence, KS 66045


Summary

Education

Ph.D., Chemical Engineering, University of Oklahoma

B.S., Chemical Engineering, University of Michigan

Research Interests

  • Catalysis
  • Biofuels
  • Hydrothermal liquefaction
  • Biomass conversion
  • Reaction engineering
  • Biodiesel

Selected Publications

Alimoradi, s. Stohr, H. Stagg-Williams, S. & Sturm, B. (2018). Effect of temperature on recalcitrant dissolved organic nitrogen (rDON) concentration: Application of thermochemical treatment of biosolids. Proceedings of the Water Environment Federation, 2018(14th), 2093-2091. DOI:10.2175/193864718825156664

Pickett, D. Depcik, C. & Stagg-Williams, S. (2018). Use of the Glycerin By-product from Biodiesel Production for Power Generation. Journal of Engineering for Gas Turbines and Power, 140(10). DOI:10.1115/1.4039819

Alimoradi, S. Hable, R. Stagg-Williams, S. & Sturm, B. (2017). Vol. 8, pp. 3888-3891. Fate of phosphorous after thermochemical treatment of algal biomass. Proceedings of the Water Environment Federation .

Alimoradi, S. Hable, R. Stagg-Williams, S. & Sturm, B. (2017). Vol. 16, pp. 111-123. Strategies to maximize P recovery and minimize biochar formation from hydrothermal liquefaction of biomass. Proceedings of the Water Environment Federation.

Fortier, M. P., Roberts, G. W., Stagg-Williams, S. M., & Sturm, B. (2017). Determination of the life cycle climate change impacts of land use and albedo change in algal biofuel production. Algal Research, 28, 270-281. DOI:10.1016/j.algal.2017.06.009

Alimoradi, S. Hable, R. Perkins, A. Stagg-Williams, S. & Sturm, B. (2016). Phosphorus recovery as calcium phosphates during thermochemical conversion of algal biomass. In WEF/IWA Nutrient Removal and Recovery Proceedings, Water Environment Federation.

Wentworth, T. Loya, S. Depcik, C. & Stagg-Williams, S. (2016). Experimental, detailed, and global kinetic reaction model for NO oxidation over platinum/alumina catalysts. Reaction Kinetics, Mechanisms and Catalysis, 117(1), 15–34.

Sturm, B. Roberts, G. Cook, E. Hable, R. & Stagg-Williams, S. (2015). Hydroxyapatite Crystallization and Biocrude Oil Production from Wastewater-Cultivated Algae. In Water and Energy 2015 Opportunities for Energy and Resource Recovery in a Changing World, Water Environment Federation.

Sturm, B. Cook, E. Roberts, G. Hable, R. & Stagg-Williams, S. (2015). Hydroxyapatite Crystallization and Biocrude Oil Production from Wastewater-Cultivated Algae. In Water and Environment Federation: Opportunities for Energy and Resource Recovery in the Changing World. Washington, D.C.

Depcik, C. Jachuck, J. Jantz, D. Kiani, F. Mangus, M. Mattson, J. Peltier, E. & Stagg-Williams, S. M. (2015). Influence of Fuel Injection System and Engine-Timing Adjustments on Regulated Emissions from Four Biodiesel Fuels. Transportation Research Record: Journal of the Transportation Research Board,(2503), 20–28. DOI:10.3141/2503-03

Nordheden, K. J., Banerjee, A. M., Billinger, J. Stagg-Williams, S. M., Chaudhari, R. V., & Subramaniam, B. (2015). CO2 conversion in a cylindrical packed-bed dielectric barrier discharge. In 22nd International Symposium on Plasma Chemistry.

Mangus, M. Kiani, F. Mattson, J. Tabakh, D. Petka, J. Depcik, C. Peltier, E. & Stagg-Williams, S. (2015). Investigating the compression ignition combustion of multiple biodiesel/ULSD (ultra-low sulfur diesel) blends via common-rail injection. Energ, 89, 932–945. DOI:10.1016/j.energy.2015.06.040

Roberts, G. W., Sturm, B. S., Hamdeh, U. Stanton, G. E., Rocha, A. Kinsella, T. L., Fortier, M. P., Sazdar, S. Detamore, M. S., & Stagg-Williams, S. M. (2015). Promoting catalysis and high-value product streams by in situ hydroxyapatite crystallization during hydrothermal liquefaction of microalgae cultivated with reclaimed nutrients. Green Chemistry, 17(4), 2560-2569. DOI:10.1039/c5gc00187k

Mahoney, E. G., Pusel, J. M., Stagg-Williams, S. M., & Faraji, S. (2014). The Effects of Pt Addition to Supported Ni Catalysts on Dry (CO2) Reforming of Methane to Syngas. Journal of CO2 Utilization, 6, 40-44.

Yun, J. Smith, V. H., deNoyelles, F. J., Roberts, G. W., & Stagg-Williams, S. M. (2014). Freshwater macroalgae as a biofuels feedstock: mini-review and assessment of their bioenergy potential. Industrial Biotechnology, 10(3), 212–220.

Fortier, M. P., Roberts, G. W., Stagg-Williams, S. M., & Sturm, B. (2014). Life Cycle Assessment of Bio-Jet Fuel from Hydrothermal Liquefaction of Microalgae. Applied Energy , 122, 73-82.

Mangus, M. D., Kiani, F. Mattson, J. Depcik, C. D., Peltier, E. & Stagg-Williams, S. M. (2014). Comparison of Neat Biodiesels and ULSD in an Optimized Single-Cylinder Diesel Engine with Electronically-Controlled Fuel Injection. Energy & Fuels, 28(6), 3849-3862.

Nuhn, J. Peltier, E. Depcik, C. Mangus, M. & Stagg-Williams, S. (2013). NOx and particulate matter emissions from a diesel engine burning Jatropha biodiesel-ULSD fuel blends. In Abstracts of Papers of the American Chemical Society. (Vol. 245).

Depcik, C. Loya, S. Srinivasan, A. Wentworth, T. & Stagg-Williams, S. (2013). Adaptive Global Carbon Monoxide Kinetic Mechanism over Platinum/Alumina Catalysts. Catalysts, 3(2), 517-542.

Roberts, G. W., Fortier, M. P., Sturm, B. M., & Stagg-Williams, S. M. (2013). Promising Pathway for Algal Biofuels Through Wastewater Cultivation and Hydrothermal Conversion. Energy and Fuels, 27(2), 857–867.

Zhao, L. Qiu, Z. & Stagg-Williams, S. M. (2013). Transesterification of canola oil catalyzed by nanopowder calcium oxide. Fuel Processing Technology, 114, 154-162.

Zbinden, M. D., Sturm, B. S., Nord, R. D., Carey, W. J., Moore, D. Shinogle, H. & Stagg-Williams, S. M. (2013). Pulsed electric field (PEF) as an intensification pretreatment for greener solvent lipid extraction from microalgae. Biotechnology and bioengineering, 110(6), 1605-15. DOI:10.1002/bit.24829

Roberts, G. W., Fortier, M. Sturm, M. & Stagg-Williams, S. M. (2012). Bio-crude from pilot wastewater fed algal systems. In Fall 2012 ACS National Meeting, Philadelphia, PA, August 19-23.

Depcik, C. Duncan, A. Mangus, M. Peltier, E. Stagg-Williams, S. & Zhong, Y. (2012). Effects of biodiesel composition on nitrogen oxide emissions from a single cylinder diesel engine. In Abstracts of Papers of the American Chemical Society. (Vol. 243).

Cecrle, E. Depcik, C. Duncan, A. Guo, J. Mangus, M. Peltier, E. Stagg-Williams, S. & Zhong, Y. (2012). An Investigation of the Effects of Biodiesel Feedstock on the Performance and Emissions of a Single-Cylinder Diesel Engine. Energy Fuels, 26(4), 2331–2341.

Duncan, A. M., Pavlicek, N. Depcik, C. D., Scurto, A. M., & Stagg-Williams, S. M. (2012). High-Pressure Viscosity of Soybean Oil-Based Biodiesel Blends with Ultra Low Sulfur Diesel Fuel. Energy and Fuels, 26(11), 7023-7036.

Williams, S. M. (2012). Reflections on Developing a Hybrid Course. Teaching Matters, 15(3).

Guo, J. Peltier, E. Carter, R. E., Krejci, A. J., Stagg-Williams, S. M., & Depcik, C. (2012). Waste cooking oil biodiesel use in two off-road diesel engines. ISRN Renewable Energy, 2012, Article ID 130782. DOI:10.5402/2012/130782

Jiang, Q. Faraji, S. Slade, D. A., & Stagg-Williams, S. M. (2011). Mixed ionic and electronic conductive (MIEC) ceramic membranes; Inorganic, Polymeric and Composite Membranes: Structure-Function and Other Correlations. In . (Ed.), Membrane Science and Technology (Vol. 14). Elsevier.

Oyama, S. Ted & Stagg-Williams, S. M. (Eds.). (2011). Inorganic, Polymeric and Composite Membranes: Structure-Function and Other Correlations (S. Ted Oyama & S. M. Stagg-Williams, Eds., Vol. 14). Membrane Science and Technology. Elsevier.

Jiang, Q. Faraji, S. Nordheden, K. J., & Stagg-Williams, S. M. (2011). CO2 Reforming Reaction Assisted with Oxygen Permeable Ba0.5Sr0.5Co0.8Fe0.2Ox Ceramic Membranes. Journal of Membrane Science, 368(1-2), 69-77.

Williams, S. M. (2011). How and why I’d Develope a Hybrid Course. Teaching Matters, 15(1).

Jiang, Q. Nordheden, K. J., & Stagg-Williams, S. M. (2011). Oxygen Permeation Study and Improvement of Ba0.5Sr0.5Co0.8Fe0.2Ox Perovskite Ceramic Membranes. Journal of Membrane Science, 369(1-2), 174-181.

Jiang, Q. Nordheden, k. & Stagg-Williams, S. (2010). Ba0.5Sr0.5Co0.8Fe0.2Ox asymmetric oxygen-permeable ceramic membrane for CO2 reforming and partial oxidation of methane. In 2010 ACS Spring Meeting, San Francisco, CA, March 21-23.

Roberts, G. W., & Stagg-Williams, S. (2010). Designer Solid Acid Catalysts for Producing Biofuels From Algal Oils. In AIChE 2010 National Meeting, Oral Presentation, Salt Lake City, UT.

Duncan, A. M., Ahosseini, A. McHenry, R. Depcik, C. D., Stagg-Williams, S. M., & Scurto, A. M. (2010). High-Pressure Viscosity of Soybean Canola and Coconut Biodiesel. In AIChE Annual Meeting. Salt Lake City, UT.

Roberts, G. W., & Stagg-Williams, S. M. (2010). Laminar Solid Acid Catalysts for the Production of Biofuels from Algal Lipids. In AIChE 2010 National Meeting, Salt Lake City, UT.

Zhao, L. Qiu, Z. & Stagg-Williams, S. (2010). Reaction Kinetics of Transesterification of Canola Oil to Biodiesel Catalyzed by Nanopowder Calcium Oxide. In 2010 AIChE annual meeting, November, 2010, Salt Lake City, UT.

Antezana, M. D., Stagg-Williams, S. & Sturm, B. (2010). Solvent Extraction of Lipids From Microalgae by Application of Pulsed Electric Field (PEF): Is It Feasible? In 2010 AIChE annual meeting, November 11. Salt Lake City, UT.

Zhao, L. Qiu, Z. & Stagg-Williams, S. (2010). Transesterification of Canola Oil Into Biodiesel Catalyzed by Nanopowder Calcium Oxide. In 2010 AIChE annual meeting, November, 2010, Salt Lake City, UT.

Faraji, S. Nordheden, K. J., & Stagg-Williams, S. M. (2010). A comparative study of Ba0.5Sr0.5Co0.8Fe0.2Ox (BSCF) and SrFeCo0.5Ox (SFC) ceramic membranes used for syngas production. Appl. Catal. B: Environ, 99 (n.1-2), 118-126.

Duncan, A. Ahosseini, A. McHenry, R. Depcik, C. D., Stagg-Williams, S. M., & Scurto, A. M. (2010). High-Pressure Viscosity of Bio-diesel from Soybean, Canola, and Coconut Oil. Energy Fuels, 24(10), 5708–5716.

Williams, S. M. (2010). Peer Collaboration: From Product to Process. Teaching Matters, 14(2).

Jiang, Q. Faraji, S. Nordheden, K. J., & Stagg-Williams, S. M. (2009). Application of Ba0.5Sr0.5Co0.8Fe0.2Ox Asymmetric Oxygen-permeable Membranes for Hydrocarbon Conversion Reactions. In 2009 North American Meeting (NAM), June 10. San Francisco, CA.

Faraji, S. Nordheden, K. J., & Stagg-Williams, S. (2009). Ba0.5Sr0.5Co0.8Fe0.2Ox Mixed Conducting Ceramic Membranes for Syngas Production. In 2009 AIChE annual meeting, Nashville, TN, November 09.

Roberts, G. W., & Stagg-Williams, S. (2009). Laminar Solid Acid Catalysts for the Production of Biofuels from Algal Lipids. In AIChE 2009 National Meeting, Nashville, TN.

Duncan, A. Bennett, W. & Stagg-Williams, S. (2009). Predicting the Oxidation Stability of Soybean Oil/Coconut Oil Blends as a Function of Feedstock Mass Fraction. In 2009 AIChE Annual Meeting, Nashville, TN.

Jiang, Q. Nordheden, K. J., & Stagg-Williams, S. M. (2009). Reaction Performance of Ba0.5Sr0.5Co0.8Fe0.2Ox Asymmetric Oxygen-Permeable Ceramic Membrane Reactor. In AICHE Annual Meeting, Nashville, TN, paper no.539a.

Slade, D. A., Jiang, Q. Nordheden, K. J., & Stagg-Williams, S. M. (2009). A comparison of mixed-conducting oxygen-permeable membranes for CO2 reforming. Catalysis Today, 148(3- 4), 290-297.

Faraji, S. Nordheden, K. J., & Stagg-Williams, S. M. (2009). The Interaction between SrFeCo0.5Ox Ceramic Membranes and Pt/CeZrO2 during Syngas Production from Methane. Catalysis Letters, 131, 114-121.

Jiang, Q. Faraji, S. Slade, D. A., Nordheden, K. J., & Stagg-Williams, S. M. (2008). Oxygen Permeation Studies of Ba0.5Sr0.5Co0.8Fe0.2Ox Asymmetric Membranes. In 2008 AIChE Annual Meeting, Philadelphia, PA, November 19.

Faraji, S. Nordheden, K. J., & Stagg-Williams, S. M. (2008). The Interaction Between SrFeCo0.5Ox (SFC) Ceramic Membrane and the Catalyst Pt/CeZrO2 for Syngas Production from Methane. In 2008 AIChE Annual Meeting, November 19, Philadelphia, PA.

Jiang, Q. Faraji, S. Slade, D. A., Nordheden, K. J., & Stagg-Williams, S. M. (2007). Performance Analysis of Mixed-Conducting Ceramic Membranes for Membrane Reactor Applications. In 2007 AIChE Annual Meeting, November 7, Salt Lake City, UT .

Lin, Y. Hohn, K. L., & Stagg-Williams, S. M. (2007). Hydrogen generation from methanol oxidation on supported Cu and Pt catalysts: Effects of active phases and supports. Appl. Catal. A: General, 327, 164–172.

Slade, D. A., Duncan, A. M., Nordheden, K. J., & Stagg-Williams, S. M. (2007). Mixed-conducting oxygen permeable ceramic membranes for the carbon dioxide reforming of methane. Green Chemistry, 9, 577.

Jaumard, N. V., Richards, R. C., Stagg-Williams, S. M., & Friis, E. A. (2007). Synthetic Lumbar Intervertebral Disc for Medical Education. Journal of Medical Devices, 1, 212.

Slade, D. A., Nordheden, K. J., & Stagg-Williams, S. M. (2007). Catalyst and Oxygen Permeable Membrane Synergy in Hydrocarbon Conversion Reactors. In North American Catalysis Society Meeting.

Yu-Chuan, L. Hohn, K. L., & Stagg-Williams, S. M. (2006). Hydrogen Generation from Methanol Oxidation on Supported Pt and Cu Catalysts. In 2006 AIChE Annual Meeting, November 13, San Francisco, CA.

Stagg-Williams, S. M. (2006). Leaving a Lasting Impression: Ideas for Attracting and Keeping students in Chemical Engineering. In 2006 AIChE Annual Meeting, November 13, San Francisco, CA.

Slade, D. A., Murphy, S. M., Duncan, A. M., Nordheden, K. J., & Stagg-Williams, S. M. (2006). Mixed-conducting oxygen-permeable ceramic membranes for the CO2 reforming of CH4. In 232nd ACS National Meeting, September 13, San Francisco, CA.

Slade, D. A., Duncan, A. M., Nordheden, K. J., & Stagg-Williams, S. M. (2006). Oxygen permeable ceramic membranes for hydrocarbon conversion reactors. In 2006 AIChE Annual Meeting, November 13. San Francisco, CA.

Slade, D. A., Murphy, S. M., Duncan, A. M., Nordheden, K. J., & Stagg-Williams, S. M. (2006). Performance enhancement of mixed-conducting oxygen-permeable ceramic membranes. In 2006 Western States Catalysis Club Meeting, Boulder, CO, February 24.

Zhao, X. Stagg-Williams, S. M., & Olafsen, J. S. (2006). Water Release from Shaken Silica Substrates in a Catalytic Reactor. In ASCE Conf. Proc, 188 (pp. 76).

Murphy, S. M., Slade, D. A., Nordheden, K. J., & Stagg-Williams, S. M. (2006). Increasing Oxygen Flux through a Dense Oxygen Permeable Membrane by Photolithographic Patterning of Platinum. Journal of Membrane Science, 277, 94.

Slade, D. A., Murphy, S. M., Duncan, A. M., Nordheden, K. J., & Stagg-Williams, S. M. (2005). Synthesis Gas Generation Using Ionic/Electronic Oxygen Permeable Membranes. In 2005 Annual AIChE Meeting, November 2, Cincinnati, OH.

Jain, A. Zhao, X. Kjergaard, S. & Stagg-Williams, S. M. (2005). Effect of Aging Time and Calcination on the Preferential Oxidation of CO over Au Supported on Doped Ceria. Catalysis Letters, 104 (3-4), 191.

Daniels, J. J., Arther, A. R., Lee, B. L., & Stagg-Williams, S. M. (2005). Infrared Spectroscopy Study of CO and CO2 on Ce- and La- Promoted Pt/ZrO2 Catalysts. Catalysis Letters, 103(3-4), 169.

Stagg-Williams, S. M. (2005). Review of Nanostructured Silicon-Based Powders and Composites. MRS Bulletin, 30(1), 60.

Mueller, S. Stallbaumer, P. Slade, D. & Stagg-Williams, S. M. (2005). Segregation of Pt and Re during CO2 Reforming of CH4. Catalysis Letters, 103(1-2), 69.

Williams, S. M. (2005). Teamwork Disconnect is Possible to Overcome. Teaching Matters, 8(3).

Jaumard, N. V., Friis, E. A., Richards, R. & Stagg-Williams, S. M. (2005). Synthetic Intervertebral Disc for Medical Education. In Proceedings from the 2005 Summer Bioengineering Conference.

Jain, A. Zhao, X. Kjergaard, S. & Stagg-Williams, S. M. (2005). Preferential Oxidation of CO over Mixed Oxide Supported Au Catalysts. In Proceedings from the 19th North American Catalysis Society Meeting.

Morrow, B. Breid, D. Shah, R. & Stagg-Williams, S. M. (2005). Pt supported Ceria Catalysts for the Low Temperature Water Gas Shift Reaction. In Proceedings from the 19th North American Catalysis Society Meeting.

Slade, D. Murphy, S. Nordheden, K. & Stagg-Williams, S. M. (2005). Synthesis Gas Generation Using Ionic/Electronic Oxygen Permeable Membranes. In Proceedings from the 19th North American Catalysis Society Meeting.

Pant, B. & Stagg-Williams, S. M. (2004). Investigation of the Stability of Pt/LaCoO3 During High Temperature Reforming Reactions. Catalysis Communications, 5, 305.

Wang, W. Stagg-Williams, S. M., Noronha, F. B., Mattos, L. V., & Passos, F. B. (2004). Partial Oxidation and Combined Reforming of Methane on Ce-Promoted Catalysts. Catalysis Today, 98(4), 553.

Wang, W. Stagg-Williams, S. M., Noronha, F. B., Mattos, L. V., & Passos, F. B. (2004). Partial Oxidation and Combined Reforming of Methane on Ce-promoted Catalysts. Fuel Chemistry Division Preprints, 49, 132-133.

Jain, A. & Stagg-Williams, S. M. (2004). Selective CO Oxidation over Au Supported on Mixed Oxides: Effect of Preparation on Activity and Selectivity. In Proceedings from the Fuel Cell Topical Conference as part of the Annual AIChE Meeting.

Stagg-Williams, S. M., & Noronha, F. B. (2003). Pt Catalysts for the Dry Reforming and Partial Oxidation of Methane. In S. G. Pandalai (Ed.), Recent Developments in Catalysis (Vol. 2). India: Research Signpost.

Noronha, F. B., Shamsi, A. Taylor, C. Fendley, E. C., Stagg-Williams, S. M., & Resasco, D. E. (2003). Catalytic Performance of Pt/ZrO2 and Pt/Ce-ZrO2 Catalysts on CO2 Reforming of CH4 coupled to Steam Reforming or under High Pressure. Catalysis Letters, 90(1), 13.

Phadnavis, V. Pant, B. & Stagg-Williams, S. M. (2002). Promoted Pt Catalysts for the Dry Reforming of Methane in the Presence of Oxygen. (1st ed., Vol. 41). In Fuel Chemistry Division Preprints

Stagg-Williams, S. M., Noronha, F. Fendley, G. & Resasco, D. E. (2000). CO2 Reforming of CH4 over Pt/ZrO2 Catalysts Promoted with La and Ce oxides. Journal of Catalysis, 194(2), 240.

Stagg-Williams, S. M., Soares, R. Romero, E. Alvarez, W. E., & Resasco, D. E. (2000). Metal-Support Interaction on Pt/ZrO2 Catalysts for the CO2 Reforming of CH4. Studies in Surface Science and Catalysis, 130, 3663.

Williams, S. M. (2000). Using Learning Styles to Enhance Education. Teaching Matters, 3(4).

Stagg, B. S., Resasco, D. & Stagg, S. M. (1998). Análisis EXAFS de Catalizadores Bimetálicos de Pt-Sn/SiO2. In XVI Simposio Iberoamericano Conference Proceedings.

Stagg-Williams, S. M., Romeo, E. Padro, C. & Resasco, D. E. (1998). Effect of Promotion with Sn on Supported Pt Catalysts for CO2 Reforming of CH4. Journal of Catalysis, 178, 137.

Stagg-Williams, S. M., & Resasco, D. E. (1998). Effects of Promoters on Supported Pt Catalysts for CO2 Reforming of CH4. Studies in Surface Science and Catalysis, 119, 813.

Borgna, A. Stagg-Williams, S. M., & Resasco, D. E. (1998). Interference Phenomena in the EXAFS Spectra of Pt-Sn Bimetallic Catalysts. Journal of Physical Chemistry B, 102(26), 5077.

Stagg-Williams, S. M., & Resasco, D. E. (1997). Effects of Promoters and Supports on Coke Formation on Pt Catalysts During CH4 Reforming with CO2. Studies in Surface Science and Catalysis, 111, 543.

Stagg-Williams, S. M., Querini, C. A., Alvarez, W. E., & Resasco, D. E. (1997). Isobutane Dehydrogenation on Pt-Sn/SiO2 Catalysts: Effect of Preparation Variables and Regeneration Treatments. Journal of Catalysis, 168, 75.

Stagg, S. M., Querini, C. A., & Resasco, D. E. (1996). Influencia del Sn en Catalizadores de Pt Soportado para Deshidrogenacion de Isobutano. In XV Simposio Iberoamericano Conference Proceedings (Vol. 2, pp. 1061-1067).

Research Interests

Thermochemical Conversion of Algal Biomass to High Value Products

Traditional conversion technologies of algal biomass to biofuels have mainly included lipid extraction or pyrolysis for biodiesel, hydrotreated renewable diesel, or bio-oil production.  These technology pathways have significant drawbacks when using algal feedstocks.  Lipid extraction requires extensive dewatering and organic solvents, diminishing the economics of fuel production and increasing environmental concerns.  Whole cell conversion pathways, like pyrolysis, alleviate environmental concerns from solvent extraction but still require extensive dewatering prior to conversion.  Hydrothermal liquefaction (HTL) utilizes temperature and pressure in the presence of water to disrupt algae cells and convert the intracellular macromolecules into a carbon-rich biocrude.  HTL of algae gives a biocrude with a composition and energy density that more closely resembles petroleum crude than bio-oil from pyrolysis.

The economics and sustainability of a viable algae-based fuel and chemical platform will depend upon a close integration of cultivation and conversion technology.   To date, HTL studies of algal biomass have focused on product formation and characterization using fresh monoculture or marine alga feedstocks.  The algal biomass has typically been purchased from existing algae producers in the nutraceutical industry, in which the high-value products support the high cost of monoculture cultivation.  However, it is generally believed that the renewable fuel industry must utilize low-cost feedstocks to compete with petroleum-derived fuels.  Since fertilizer inputs represent a large monetary and environmental cost for cultivation, sustainable algal biomass production should rely on macronutrients provided in wastewater.  Wastewater-fed algal cultivation systems also have a dual benefit of performing biological nutrient removal from wastewater.  Our team investigates the HTL of polyculture algae cultivated in municipal wastewater and have demonstrated that the effect of the growth media can have significant and beneficial impacts on the biocrude properties (lower oxygen content) and the product distribution (lower gas production) from the HTL reactor.  Algae produced from wastewater sources typically have higher ash contents which results in biochar being produced in the HTL reactor.  The biochar itself can be a valuable co-product, but also may have some catalytic effects in the reactor helping to reduce oxygen content of the biocrude during HTL processing. 

Glycerol Reforming for Syngas and Hydrogen Production 

The significant increase in biodiesel production worldwide has resulted in the vast availability of crude glycerol. The conversion of this byproduct glycerol into higher value products could significantly improve the feasibility of continued growth in biodiesel production. In particular, coupling synthesis gas (H2 and CO) from glycerol and Fischer-Tropsch synthesis provides a path to liquid fuels giving economic incentive as well as increase fuel flexibility. This project has looked at catalysts for the steam reforming of glycerol as a means of producing a hydrogen rich synthesis gas stream. Specifically we are interesting in the effect if impurities on the catalyst lifetime and the yield of hydrogen. We are looking at different pretreatments to the crude glycerin to minimize the necessary glycerol processing while maintaining catalyst performance. In addition to the smaller scale reforming reactions that are conducted we are working in collaboration with Dr. Chris Depcik in Mechanical Engineering to evaluate larger scale reforming of glycerin for power generation.

Heterogeneous Materials for Lean NOx Traps 

With increasing Mile Per Gallon (MPG) standards for passenger vehicles in the united states Lean-burn diesel engines are becoming more popular as they represent significant fuel savings relative to traditional stoichiometric engines. Emissions from lean burn diesel engine exhaust consistent of much higher amounts of NO/NO2 resulting in difficulties meeting NOx regulation standards. One way to reduce NOx concentrations is through the implementation of a Lean NOx Trap (LNT) catalyst. It is important to understand the processes of NO oxidation as well as LNT catalyst degradation to effectively implement this type of catalyst in Lean Burn Diesel exhausts.

Our research in this area focusses on synthesis, characterization and testing of heterogeneous catalysts for the oxidation of NO. The project is conducted in collaboration with Dr. Christopher Depcik in the mechanical engineering department at the University of Kansas. We are currently investigating the effects of catalyst aging on the effectiveness of supported Pt in LNT catalyst for use in NOx emission reduction in lean burn diesel engine exhausts. We are also investigating the use of novel supports to facilitate oxygen adsorption and reactivity for NO oxidation to increase the efficiency of LNT catalysts.

Electroporation of Algae

As a crucial alternative to petroleum liquid fuels and first generation biodiesel, microalgae represent the most promising renewable source of lipids, thought to be capable of meeting global transportation fuel needs. The most promising characteristics of this alternative energy source are its CO2 neutrality, high biomass growth, high lipid yield, and noncompetitive stance toward food supply. To date, development of economically feasible lipid solvent extraction processes of industrial scale face two significant challenges: green solvent selection with efficient extractive characteristics and requirement of cell disruption pretreatment. This research focuses on the use of greener solvents coupled with the novel utilization of Pulsed Electric Field (PEF) as a membrane permeating technique for extraction intensification. This technology can be applied to increase extraction efficiency not only for lipids but for other compounds that can be used for higher value products. 

Fuel Property Modeling

Biodiesel Production Plant


Peer Reviewed Publications

  • Sean M. Murphy, David A. Slade, Karen J. Nordheden, and Susan M. Stagg-Williams, Increasing Oxygen Flux through a Dense Oxygen Permeable Membrane by Photolithographic Patterning of Platinum, Journal of Membrane Science, 277 (1-2), 94 (2006).
  • Abhishek Jain, Xin Zhao, Shane Kjergaard, and Susan M. Stagg-Williams, Effect of Aging Time and Calcination on the Preferential Oxidation of CO over Au Supported on Doped Ceria, Catalysis Letters, 104 (3-4), 191 (2005).
  • John J. Daniels, Andrew R Arther, Brent L. Lee, and Susan M. Stagg-Williams, Infrared Spectroscopy Study of CO and CO2 on Ce- and La- Promoted Pt/ZrO2 Catalysts, Catalysis Letters, 103(3-4), 169 (2005)
  • Sean Mueller, Patrick Stallbaumer, David Slade, and Susan Stagg-Williams, Segregation of Pt and Re during CO2 Reforming of CH4, Catalysis Letters, 103(1-2), 69 (2005).
  • Wei Wang, Susan M. Stagg-Williams, Fabio B. Noronha, Lisiane V. Mattos, and Fabio B. Passos, Partial Oxidation and Combined Reforming of Methane on Ce-Promoted Catalysts, Catalysis Today, 98(4), 553 (2004).
  • Bakul Pant and Susan M. Stagg-Williams, Investigation of the Stability of Pt/LaCoO3 During High Temperature Reforming Reactions, Catalysis Communications, 5, 305 (2004).
  • S. M. Stagg-Williams and F. B. Noronha, Pt catalysts for the dry reforming and partial oxidation of methane, in Recent Developments in Catalysis, Vol. 2, ed. S. G. Pandalai (Research Signpost, India, (2003) 205.
  • F.B. Noronha, C. Taylor, E.C. Fendley, S. M. Stagg-Williams, and D. E. Resasco, "Catalytic Performance of Pt/ZrO2 and Pt/Ce-ZrO2 Catalysts on CO2 Reforming of CH4 coupled to Steam Reforming or under High Pressure ", Catalysis Letters, Vol. 90(1) 13( 2003).
  • Susan M. Stagg-Williams, Fabio Nornoha, Gene Fendley, and Daniel E. Resasco,"CO2 Reforming of CH4 over Pt/ZrO2 Catalysts Promoted with La and Ce oxides", Journal of Catalysis, Vol. 194 (2), 240 (2000).
  • Susan M. Stagg-Williams, Ricardo Soares, Enrique Romero, Walter E. Alvarez and Daniel E. Resasco, Metal-Support Interaction on Pt/ZrO2 Catalysts for the CO2 Reforming of CH4, Studies in Surface Science and Catalysis, Vol. 130, 3663 (2000).
  • S.M. Stagg and D. E. Resasco, Effects of Promoters on Supported Pt Catalysts for CO2 Reforming of CH4, Studies in Surface Science and Catalysis, Vol. 119, 813 (1998).
  • S.M. Stagg, E. Romeo, C. Padro, and D. E. Resasco, Effect of Promotion with Sn on Supported Pt Catalysts for CO2 Reforming of CH4, Journal of Catalysis, Vol. 178, 137 (1998).
  • Armando Borgna, Susan M. Stagg, and Daniel E. Resasco, "Interference Phenomena in the EXAFS Spectra of Pt- Sn Bimetallic Catalysts," Journal of Physical Chemistry B, Vol. 102 (26), 5077 (1998).
  • Susan M. Stagg and Daniel E. Resasco, Effects of Promoters and Supports on Coke Formation on Pt Catalysts During CH4 Reforming with CO2, Studies in Surface Science and Catalysis, Vol. 111, 543 (1997).
  • S. M. Stagg, C. A. Querini, W. E. Alvarez, and D. E. Resasco, Isobutane Dehydrogenation on Pt-Sn/SiO2 Catalysts: Effect of Preparation Variables and Regeneration Treatments, Journal of Catalysis, Vol. 168, 75 (1997).

Additional Peer Reviewed Full Length Manuscripts

  • A. Borgna, S. Stagg, and D. Resasco, "Analysis EXAFS de Catalizadores Bimetalicos de Pt-Sn/SiO2," XVI Simposio Iberoamericano Conference Proceedings, (1998).
  • S. M. Stagg, C. A. Querini, and D. E. Resasco,Influencia del Sn en Catalizadores de Pt Soportado para Deshidrogenacion de Isobutano, XV Simposio Iberoamericano Conference Proceedings, Vol 2, 1061-1067 (1996).

Limited Peer Reviewed Publications

  • Venkatesh Phadnavis, Bakul Pant, and Susan M. Stagg-Williams, "Promoted Pt catalysts for the dry reforming of methane in the presence of oxygen", accepted in Fuel Chemistry Division Preprints, Vol. 41 (1), (2002).

Non-Reviewed Publications

  • Susan Williams, "Using Learning Styles to Enhance Education," Teaching Matters, A publication by the University of Kansas Center for Teaching Excellence, Vol 3(4), (2000).

Upcoming Events and Deadlines

Tuesday, May 14th - 8:00AM | Mubarak Alhajeri's Final Doctoral Defense | 298 Slawson 

and 2:00PM | Sayantani Basu's Comprehensive Exam | G535 LEEP2

Wednesday, May 15th - 9:00am | Sherifa Cudjoe's Final Doctoral Defense | 298 Slawson Hall

Saturday, May 18th - School of Engineering Recognition Ceremony | starts at 8am | Allen Fieldhouse

Saturday, May 18th - Doctoral Hooding Ceremony | 7:30pm | Lied Center | LINK

Sunday, May 19th - University Commencement | 10:30am | https://commencement.ku.edu/

Monday, May 20th - CPE Department Picnic | starts @ 5PM | Holcom Park Shelter


CPE Weekly Graduate Seminar Schedule 

For School of Engineering Events, Click HERE.

Looking for Graduate Workshops and Events? Click HERE for Engineering and HERE for the COGA calendar

University Events can be found HERE