Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 5, Issue 7, Pages 7864-7868Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ee21305b
Keywords
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Funding
- Catalysis Center for Energy Innovation
- Energy Frontier Research Center
- U.S. Department of Energy, Office of Science
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-SC0001004]
- U.S. Department of Energy Early Career Program, Basic Energy Sciences - Catalysis [DE-SC0006640]
- U.S. Department of Energy (DOE) [DE-SC0006640] Funding Source: U.S. Department of Energy (DOE)
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Fast pyrolysis of biomass thermally cracks solid biopolymers to generate a transportable liquid (bio-oil) which can be upgraded and integrated with the existing petroleum infrastructure. Understanding how the components of biomass, such as cellulose, break down to form bio-oil constituents is critical to developing successful biofuels technologies. In this work, we use a novel co-pyrolysis technique and isotopically labeled starting materials to show that levoglucosan, the most abundant product of cellulose pyrolysis (60% of total), is deoxygenated within molten biomass to form products with higher energy content (pyrans and light oxygenates). The yield of these products can be increased by a factor of six under certain reaction conditions, e.g., using long condensed-phase residence times encountered in powder pyrolysis. Finally, co-pyrolysis experiments with deuterated glucose reveal that hydrogen exchange is a critical component of levoglucosan deoxygenation.
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