报告题目：Commodity Chemicals from Biomass: Catalytic Conversion of Biomass into α,ω-diols
报 告 人：Prof. George W. Huber
This presentation is about a multi-step catalytic approach for conversion of cellulose into 1,6-hexanediol and hemicellulose into 1,5 pentanediol as well as other oxygenated commodity chemicals. These α,ω-diols are high-volume (130,000 tons/year), high value ($4,600/ton) commodity chemicals used in the polymer industry. Cellulose is first converted levoglucosan which is then dehydrated into levoglucosenone (LGO) in the condensed phase with dilute acid (5-20 mM acid concentration) using a polar, aprotic solvent. The product selectivity and catalyst activity is a function of the water concentration, the solvent type and the cellulose loading. The activity of the acid catalyst is a function of the thermodynamics of the solvent system as will be presented using a molecular dynamics model. The LGO is then hydrogenated into dihydrolevoglucosenone, levoglucosanol, and tetrahydropyran-2-methanol (THPM). The THPM then undergoes selective C-O-C hydrogenolysis to produce 1,6-hexanediol using a bifunctional (Pt-WOx/TiO2) catalyst with > 90% selectivity to 1,6 hexanediol. Tetrol and 1,2,6 hexanetriol can also be selectively produced with this system. The functionality of these molecules can be exploited to produce a range of high performance material. The hemicellulose is converted into furfural which then undergoes a four step process to produce 1,5 pentanediol. In the first step furfural is hydrogenated into tetrahydrofurfuryl alcohol (THFA). The THFA is then dehydrated into dihydropyran (DHP) and water. The last two steps involves hydration of the DHP and then hydrogenation of this hydrated species. We will outline the catalytic chemistry that happens in each of these steps and the catalytic challenges for production of new biomass based commodity chemicals.
George W. Huber is a Professor of Chemical and Biological Engineering at University of Wisconsin-Madison. His research focus is on Breaking the Chemical and Engineering Barriers to Lignocellulosic Biofuels. George is currently working with governmental and industrial institutions to help make cellulosic biofuels a reality. He is the co-founder of Anellotech a biofuel company focused on commercializing catalytic fast pyrolysis a new technology developed by the Huber research group to convert biomass into gasoline range aromatics. George's discovery of Raney-NiSn catalyst for hydrogen production from biomass-derived oxygenates was named as one of top 50 technology breakthroughs of 2003 by Scientific America. George has spoken at two US congressional briefings to discuss the vital role of Chemical Engineering and heterogeneous catalysis in helping to solve our nation's energy challenges. He has authored more than 160 peer-reviewed publications including three publications in Science, which have received more than 27,000 citations and total citations in 2017 was 4,017. 19 published patents and patent applications related to catalysis and biomass. George serves on the editorial board of Energy and Environmental Science and ChemCatChem. He is also on the scientific advisory board of the National Advanced Biofuels Consortium and CatchBio.