SUMMARY OF RESEARCH DIRECTIONS
Roger Hilten is
a Research Engineer II in the University of Georgia's Biorefining and Carbon
Cycling Program. For over eight years, Roger Hilten has managed the Biorefinery's thermochemical analytical laboratory and
equipment and has coordinated industrially-, state-, and federally-funded
projects involving research and development of biofuels and bio-based
products. He has worked to develop novel ways to test the properties of
bio-based products using state-of-the-art analytical tools including thermal
analysis, mass spectrometry, and FT-IR.
Hilten, R., Kastner, J.R., Das, K.C., Bibens, B. 2009. Production higher quality bio-oils by in-line esterification of pyrolysis vapor. Patent Pending. Provisional Patent application serial No.: 61/154,863. University of Georgia.
Hilten, R., R. Speir, J. Kastner, K.C. Das. Modeling oleic acid conversion over a fixed-bed of HZSM-5 in both diffusion and reaction rate-limited regimes with experimental validation. To be submitted to the Applied Catalysis, 2013.
Vandenbrink, J., Hammonds, R., Hilten, R., Das, K.C., Henson, J.M., Paterson, A.H., Feltus, F.A. Tissue specific analysis of bioconversion traits in the bioenergy grass Sorghum bicolor. Industrial Crops and Products, accepted for publication.
Vandenbrink, J., Hilten, R., Das, K.C., Paterson, A., Feltus, F.A. Quantitative models of hydrolysis conversion efficiency and biomass crystallinity index for plant breeding. Plant Breeding, published online 7 Apr 2013, DOI: 10.1111/pbr.12066.
Hilten, R., Speir, R., Kastner, J., Mani, S., Das, K.C. 2013. Effect of torrefaction on bio-oil upgrading over HZSM-5. Part 1. Product yield, product quality, and catalyst effectiveness for benzene, toluene, ethylbenzene, and xylene production. Energy and Fuels, 27(2): 830-843, DOI: 10.1021/ef301694x.
Hilten, R., Speir, R., Kastner, J., Mani, S., Das, K.C. 2013. Effect of torrefaction on bio-oil upgrading over HZSM-5. Part 2: Byproduct formation and catalyst properties and function. Energy and Fuels, 27(2): 844-856, DOI: 10.1021/ef301695c.
Jarvis, J., A. McKenna, R. Hilten, K.C. Das, R. Rodgers, A. Marshall. 2012. Characterization of pine pellet and peanut hull pyrolysis bio-oils by negative-ion electrospray ionization Fourier Transform Ion Cyclotron Resonance Mass Spectrometry. Energy and Fuels, 26: 3810-3815. (1)
Vandenbrink, J., R. Hilten, K. C. Das, A. Paterson, F.A. Feltus. 2012. Analysis of crystallinity index and hydrolysis rates in the bioenergy crop Sorghum bicolor. Bioenergy Resources, 5(5): 387-397.
Hilten, R., R. Speir, K. Kastner, K.C. Das. 2011. Production of aromatic green gasoline additives via catalytic pyrolysis of acidulated peanut oil soap stock. Bioresource Technology, 102: 8288-8294. (1)
Das, K.C., K. Singh, B. Bibens, R. Hilten, S. Baker, D. Greene, J. Peterson. 2010. Pyrolysis characteristics of forest residues obtained from different harvesting methods. Applied Engineering in Agriculture, 27(1): 107-113.
Hilten, R., K.C. Das. 2010. Comparison of three accelerated aging procedures to assess bio-oil stability. Fuel, 89: 2741-2749. (10)
Hilten, R., B. Bibens, J. Kastner, K.C. Das. 2010. In-Line esterification of pyrolysis vapor with ethanol improves bio-oil quality. Energy and Fuels, 24: 673-682. (18)
Hilten, R., R. Speir, J. Kastner, K.C. Das. 2010. Production of fuel from the catalytic cracking of pyrolyzed poultry DAF skimmings. Journal of Analytical and Applied Pyrolysis, 88: 30-38. (3)
Hilten, R., T. Lawrence, E. Tollner. 2008. Modeling stormwater runoff from green roofs with HYDRUS-1D. Journal of Hydrology 358(3): 288-293. (22)
Hilten, R., T. Lawrence. 2007. Using Green Roof and Other Technologies for Reducing the Need for Stormwater Retention Capacity. Low Impact Development: New and Continuing Applications. Second National Low Impact Development Conference, March 12-14, 2007, Wilmington, NC. ASCE Conf. Proc. 331, 21 (2007), DOI: 10.1061/41007(331)21, pp. 226-239.
Mani, Jim Kastner, Roger Hilten, Gerry Lindo, and KC Das. Integrating Biomass
Torrefaction with Pyrolysis for Improved Bio-Crude Oil Production. ASABE
Annual International Meeting, June 21-24, 2009: Reno, Nevada
Hilten, R., T.M. Lawrence. Using Green Roof and Other Technologies for Reducing the Need for Stormwater Retention Capacity. Oral presentation at the 2007 2nd National Low Impact Development Conference. Wilmington, NC.
Hilten, R., T.M. Lawrence, E.W. Tollner, and D. Gattie. Predicting building energy use and stormwater runoff associated with greenroofs. Oral presentation at the 2006 annual meeting of the American Ecological Engineering Society.
Hilten, R., T.M. Lawrence. Greenroofing as a stormwater management tool. Oral presentation at the 2005 Joint Southeastern Stormwater Management and Erosion and Sediment Control Conference.
Hilten, R., T.M. Lawrence, and E.W. Tollner. An analysis of the energetics and stormwater
mediation potential of greenroofs. Poster presentation at the 2005 annual
meeting of the UGA Biological and Agricultural Engineering Department.