Processes, Biofuels, and Bioproducts. Dr. Hanwu Lei's Group Bioproducts, Science, and Engineering Laboratory Department of Biological Systems Engineering, Washington State University. Outline. Dr. Hanwu Lei’s research group
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Dr. Hanwu Lei's Group
Bioproducts, Science, and Engineering Laboratory
Department of Biological Systems Engineering, Washington State University
Lu Wang, PhD. Working on catalysis for jet fuels
Yi Wei, PhD Research Assistant, Department of Biological Systems Engineering, WSU; PhD dissertation: Pyrolysis oil upgrading via liquid extraction, esterification and upgrading via catalysts (in progress)
Lei Zhu, PhD Research Assistant, Department of Biological Systems Engineering, WSU; PhD dissertation: Development of processes and catalysts for aviation biofuels production (in progress)
Xuesong Zhang, PhD Research Assistant, Department of Biological Systems Engineering, WSU; PhD dissertation:Upgrading bio-oils from Douglas fir pellets with packed-bed catalysis over catalysts coupled with microwave-assisted pyrolysis (in progress)
Yupeng Liu, MS student, Department of Biological Systems Engineering, WSU; MS thesis: Torrefaction of Douglas fir pellets and its upgrading (in progress)
Gayatri Yadavalli, MS student, Environmental Engineering, WSU; MS thesis: Activated carbon produced by microwave pyrolysis of biomass for use in waste treatment (in progress)
Quan Bu, PhD, Department of Biological Systems Engineering, WSU (Research Assistant from Aug. 2010-Aug. 2013; Now Assistant Professor at Nanjing Forestry University); PhD dissertation:Catalytic microwave pyrolysis of biomass for renewable phenols and fuels (Graduated Summer 2013).
Lu Wang, PhD, Department of Biological Systems Engineering, WSU (Research Assistant from Aug. 2010-Aug. 2013; Now post-doc at Washington State University); PhD dissertation:Aromatic hydrocarbons production from catalyst assisted microwave pyrolysis of Douglas fir sawdust pellet (Graduated Summer 2013).
ShoujieRen, PhD, Department of Biological Systems Engineering, WSU (Research Assistant from Jan. 2010-Dec. 2012; Now post-doc at University of Tennessee); PhD dissertation:Catalytic microwave torrefaction and pyrolysis of Douglas fir pellet to improve biofuel quality (Graduated Fall 2012).
IwonaCybulska, PhD, Department of Biological and Agricultural Engineering, SDSU (Research Assistant from Jan. 2008-May. 2012; Now post-doc at Masdar Institute of Science and Technology); PhD dissertation:Pretreatment methods for lignocellulosic materials employed to produce fuel ethanol and value-added products (Graduated Spring 2012).
Jing Liang, MS, Department of Biological Systems Engineering, WSU (Research Assistant from Aug. 2011-Aug. 2013; Now PhD student at University of California, Riverside); MS project title: Tech-economic analysis of microwave pyrolysis of Douglas fir pellet (Graduated Summer 2013)
Biomass has to be dried
before fast/flash pyrolysis
Wet biomass can be used
Microwave:No energy required as size not important.
Demonstrated on 4 mm pellets, 7x15mm2 wood blocks, and 1x0.6x0.6m3 stover bales (Lei et al, 2009; Moen et al., 2009; Zhao et al., 2011)
Miao et al., 2011
Microwave: No energy required before pyrolysis!
Do NOT require biomass (8-20%MC) drying before pyrolysis stage
Microwave vs Conventional: Energy Comparison
Bio-oil yield is about 60% based on dry Douglas fir pellets
Supply biochar for a coal-firing plant: 35% efficiency to electricity and 90% transmission efficiency to microwave pyrolysis plant =8,530,353*35%*90%=2,687,061 BTU
More than 150% electricity can be supplied from biochar firing
Biomass fir pellets Torrefaction to Torrefied Biomass
Yang H. et al., Characteristics of hemicellulose, cellulose and lignin pyrolysis. Fuel, 2007, 86: 1781–1788
70-90% yield torrefied biomass
Torrefaction: 200–300℃ in absence of oxygen
Tumuluru J.S. et al., A review on biomass torrefaction process and product properties for energy applications. Industrial Biotechnology, 2011, 7: 384-401.
Torrefied fir pellets Biomass Pyrolysis
+ gases + char
Char + gases
Lignocellulosic fir pellets
Hydrothermal/hot water pretreatment
Organosolv fractionationOverview Processes in Dr. Lei’s Group
Substitute of petroleum-based
phenols as for chemical industry
(i.e. phenol formaldehyde resin, bio-plastics)
(i.e. gasoline, jet fuel)
(i.e. aromatics, phenols)
Dehydration fir pellets
Catalyst assisted dehydration
Zeolite assisted demethoxylation
Aromatics in chemical refined petroleum fuels
Data derived from NIPER Report 1989 by National Institute for Petroleum and Energy Research (NIPER-428);
DFM and F-76 data derived from National Academy of Sciences.
US gas data from CA based Guided Wave, Inc.; other countries' data from Faruq et al., 2012.
Opportunity for Utilizing Lignin fir pellets
Possible lignin transformation technologies
Holladay et al., 2007
Lignin-to-phenols Mechanism fir pellets
GC/MS Analysis of Phenols Enriched Bio-oils fir pellets
N. Smolarski. 2012
Cellulose after clean fractionation