Author : Siddarth Hari Krishna
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (112 download)
Book Synopsis Controlling Reactivity in the Conversion of Biomass-derived Levoglucosenone to Renewable Chemicals Over Metal and Acid Catalysts by : Siddarth Hari Krishna
Download or read book Controlling Reactivity in the Conversion of Biomass-derived Levoglucosenone to Renewable Chemicals Over Metal and Acid Catalysts written by Siddarth Hari Krishna and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have investigated the catalytic conversion of biomass-derived intermediates to a variety of renewable chemicals over metal and acid catalysts, with an emphasis on the platform molecule levoglucosenone. Lignocellulosic biomass and sugars are sustainable sources of carbon which can be converted, through selective C-O cleavage and hydrogenation reactions, to precursors to high-value chemicals such as polymers and non-toxic solvents. Metal catalysts facilitate hydrogenation of C=C and C=O bonds; acid catalysts facilitate C-O cleavage reactions; and bifunctional metal-acid catalysts facilitate these reactions in tandem. As biomass-derived feedstocks are highly functionalized, controlling the selectivity to desired products is a critical component of economically viable conversion processes. Reaction pathways were elucidated using a combination of techniques including analysis of products formed over time, variation of reaction conditions, variation of active site properties, investigation of stereochemistry, and isotopic labeling. Reactions studied include the acid-catalyzed isomerization of levoglucosenone to 5-hydroxymethylfurfural; the metal-catalyzed hydrogenation to Cyrene and levoglucosanol; hydrogenolysis of levoglucosanol to tetrahydrofurandimethanol; hydrogenolysis of levoglucosanol to 1,2,5,6-hexanetetrol; and conversion of methyl glycosides to hexane-tetrols and hexane-triols. We demonstrated how a fundamental understanding of the catalytic chemistry leads to the ability to tune selectivity towards desired products, thereby providing directions for the rational design of processes to produce valuable chemicals from biomass.