Catherine Almquist, Ph.D., P.E.

Research Highlights

Research Interests

  • Environmental Catalysis
  • Photocatalysis
  • Adsorption

Research Projects

  • Novel adsorbents for fuel vapor recovery
  • Catalysts for CO2 reforming of methane
  • Applications of Photocatalysis for destruction of fuel vapors
Portrait of Catherine Almquist PE

Associate Professor

64 J Engineering Building


  • Ph.D.—Environmental Engineering, University of Cincinnati—2001
  • M.S.—Chemical Engineering, University of Cincinnati—1997
  • B.S.—Chemical Engineering, Ohio State University—1989


  • Associate Professor, Miami University, 2007–present
  • Assistant Professor, Miami University, 2001–2007

Consulting/Professional Experience

  • Research Scientist, Aerosol Science and Technology Assessment, Battelle Memorial Institute, 1990–1997 
  • Chemical Engineer, Process Research and Development, Dow Corning, Inc., 1989–1990

Principal Publications


  • Singh, R, Dong, H, Liu, D,  Zhao, L, Marts, AR, Farquhar, E, Tierney, DL, Almquist, CB, and Briggs, BR (2015).  Reduction of hexavalent chromium by the thermophilic methanogen Methanothermobacter thermautotrophicus.  Geochimica et Comsochimica Acta, 148, pp. 442-456.
  • Almquist, C, Krekeler, M, and Jiang, LL (2014).  An investigation on the structure and catalytic activity of cryptomelane-type manganese oxide materials prepared by different synthesis routes. Chemical Engineering Journal, 252, pp. 249-262. 
  • Smith, DB and Almquist, CB (2014).  The anaerobic co-digestion of fruit and vegetable waste and horse manure mixtures in a bench-scale, two-phase anaerobic digestion system.  Environmental Technology, 35(7), pp. 859-867.
  •  Almquist, C. and Qin, N. (2012), Pyrolysis of deinked paper sludge to synthesize adsorbents for elemental Hg vapors. Environ. Prog. Sustainable Energy, 32(3), pp. 524-534.
  • Sahle-Demessie E, Almquist CB, and Devulapelli VG (2011).  Pilot-Scale Study on Ozone-Enhanced Catalytic Oxidation of Waste Gas Emissions from the Pulp and Paper Industry.  Environmental Progress & Sustainable Energy, 30(3), pp. 268-277. 
  • Almquist, C (2010).  Considerations of Particle Size in Aqueous Phase Photocatalysis kinetics with TiO2.Journal of Advanced Oxidation Technologies, 13(3) Special Issue: SI, pp. 262-273.
  • Guy Litt and Catherine Almquist (2009). An Investigation of CuO/Fe2O3 Catalysts for the Gas-Phase Oxidation of Ethanol. Applied Catalysis B: Environmental, 1-2, pp. 10-17.
  • Endalkachew Sahle-Demessie, Catherine B. Almquist and Sridara Chandra Sehker (2008). The role of catalyst properties on methanol oxidation over V2O5-TiO2 using ozone. Water, Air, and Soil Pollution: Focus, 8, p. 297-309. 
  • Catherine B. Almquist, Endalkachew Sahle-Demessie, Sridara Chandra Sehker, and Julia Sowash (2007). Methanol oxidation using ozone on titania-supported vanadia catalyst. Environmental Science and Technology, 41(13) pp. 4754-4760. 
  • Bart Wojas and Catherine Almquist (2007). Mass concentration and metals speciation of PM2.5, PM10, and total suspended solids in Oxford, Ohio and comparison with those from metropolitan sites in the Greater Cincinnati Region. Atmospheric Environment, 41, pp. 9064-9078. 
  • V. Kumar, N. Lee, and C. L. Bothe Almquist (2006). The catalytic oxidation of methanol over nanostructured WO3/V2O5/TiO2 catalysts prepared by 2 different methods. Applied Catalysis B: Environmental ,69 pp. 101-114. 
  • Almquist, C. B. and L. Boyd (2004), "The application of photocatalysis on TiO2 for degrading COD in paper mill wastewaters" TAPPI Journal, 3(9), pp 9-15. 
  • G. Wu, C. L. B. Almquist and S-T Hwang (2004), "High gas permeability in open structure membranes", Korean Journal of Chemical Engineering, 21(2), pp. 442-453. 
  • Sylian Rodriguez, C.L. Bothe Almquist, Tai Gye Lee, Masami Furuuchi, Elizabeth Hedrick, and Pratim Biswas (2004). "A mechanistic model for mercury capture with in-situ generated titania particles: Role of water vapor", Journal of Air and Waste Management Association, 54(2), pp. 149-156. 
  • John Graham, C. L. Bothe Almquist, Sachin Kumar and Sukh Sidhu (2004), " An Investigation of Nanostructured Vandia/Titania Catalysts for the Oxidation of Monochlorobenzene", Applied Catalysis, 88(1-2), pp. 73-82. 
  • Catherine B. Almquist, E. Sahle-Demessie, Julius Enriquez and Pratim Biswas (2003), "The Photocatalytic Oxidation of Low Concentration Methyl-tertiary Butyl Ether on Titanium Dioxide in Synthetically Prepared and Field Samples of Ground Water in a Falling Film Reactor.", Environmental Progress, Vol. 22, Iss. 1, pp. 14-23. 
  • Catherine B. Almquist and Pratim Biswas (2002), "Role of Synthesis Method and Particle Size Nanostructured TiO2 on its Photoactivity", Journal of Catalysis, Vol. 212, pp. 145-156. 
  • E. Sahle-Demessie, Teri Richardson, Catherine B. Almquist, and Unnikrishnan R. Pallai (2002), "Comparison of Liquid and Gas-Phase Photooxidation of MTBE: Synthetic and Field Samples", Journal of Environmental Engineering , Vol. 128, pp.782.790. 
  • C. L. Bothe Almquist and P. Biswas, (2001). A mechanistic approach to modeling the effect of dissolved oxygen in photo-oxidation reactions on titanium dioxide in aqueous systems. Chemical Engineering Science56 (11), pp. 3421-3430. 
  • C. L. Bothe Almquist and P. Biswas, (2001). The photo-oxidation of cyclohexane on titanium dioxide: an investigation of competitive adsorption and its effects on product formation and selectivity. Applied Catalysis A: General214 (2), pp. 259-271. 
  • C. L. Bothe Almquist, Ettireddy, R.P., Bobst, A. and Smirniotis, P., (2000). An XRD, XPS, and EPR study of Li/MgO catalysis: case of the oxidative methylation of acetonitrile to acrylonitrile and methane. Journal of Catalysis192, pp. 174-184. 
  • C. L. Bothe Almquist and S.T. Hwang, (1999). The Permeation of Organophosphorus Compounds in Silicone Rubber Membranes. Journal of Membrane Science153 (1), pp. 57-69. 


  • Catherine Almquist, 19th International Conference on Semiconductor Photocatalysis and Solar Energy Conversion, San Diego, CA, November, 2014. Use of UV/LEDs for AOT water treatment.
  • Catherine Almquist, 3rd International Congress on Sustainability Science and Engineering, Cincinnati, Ohio August, 2013. Poster Presentation on PFOA adsorption on Activated Carbons.
  • Catherine Almquist, Lulu Jiang, Jared Minges, Ryan Flannery, and Mark Krekeler, AICHE Annual Conference, Pittsburgh, PA, October 31, 2012.  Oral presentation on The role of Zn on structure and catalytic activity of MnO2 catalysts.
  • David Smith and Catherine Almquist, 6th Annual University Clean Energy Alliance of Ohio (UCEAO) conference in Columbus, Ohio, April 2012.  Poster presentation on Anaerobic digestion of Food Waste and Horse Manure Mixtures - an investigation on biogas composition and yield.
  • Catherine Almquist, AICHE Annual Conference, Minneapolis, MN, October 2011.  Oral presentation on the Use of pyrolyzed de-inked paper sludge as an elemental Hg adsorbent.
  • Catherine Almquist, 5th Annual University Clean Energy Alliance of Ohio (UCEAO) conference in Columbus, Ohio, April 2011.  Two poster presentations on 1) Anaerobic digestion of horse manure at Miami University; and 2) Catalytic gasification of biomass.
  • Catherine Almquist, 4th Annual University Clean Energy Alliance of Ohio (UCEAO) conference in Columbus, Ohio, April 2010.  Poster presentation on Gasification of biomass using a novel lab-scale gasification reactor.
  • Catherine Almquist, 14th International Conference on TiO2 Photocatalysis: Fundamentals and Applications. Niagara Falls, NY, October 8, 2009 “Role of TiO2 particle size on aqueous-phase photocatalysis”. 
  • Catherine Almquist, TAPPI EPE Conference. Memphis, TN, October 13, 2009 “Field study on ozone-enhanced catalytic oxidation of waste gas emission from the pulp and paper industry”. 
  • Catherine Almquist, AICHE Annual Conference, Nashville, TN, Nov 8-13, 2009 “Field study on ozone-enhanced catalytic oxidation of waste gas emission from the pulp and paper industry”, presented by E. Sahle Demessie of the US EPA in Cincinnati. 
  • Catherine B. Almquist, Central Regional Meeting of the American Chemical Society (CERMACS), Columbus, Ohio. Guy Litt’s technical poster was presented at a poster session, entitled “An Investigation of CuO/Fe2O3 Catalysts for the Gas-Phase Oxidation of Ethanol.” 
  • Sharma, G. and Almquist, C. B. (2007), “Ozone-enhanced photocatalytic oxidation of methylene blue” 37th Mid-Atlantic Industrial and Hazardous Waste Conference, March 21-23, Cincinnati, Ohio. ”
  • PonRajesh Periasamy Vairavanathan and Almquist, C. B. (2007), “Bilayer Film Catalysis of ZnO-CdO and a Comparison with ZnO Film Catalysis.” 12th International Conference on TiO2 Photocatalysis: Fundamentals and Applications, and 13th International Conference on Advanced Oxidation Technologies for Treatment of Water, Air, and Soil, September 24-27, Niagara Falls, NY. 


  • US Patent 05445742, "Process for Purifying Halosilanes", Dow Corning Corporation, August 29, 1995.