Identification and thermochemical analysis of high-lignin feedstocks for biofuel and biochemical production
- Identification and thermochemical analysis of high-lignin feedstocks for biofuel and biochemical production
- Venugopal Mendu; Anne E. Harman-Ware; Mark Crocker; 제정호; Jozsef Stork; Samuel Morton; Andrew Placido; George Huber; Seth DeBolt
- biofuels; catalytic fast pyrolysis; bio-oil; lignocellulose; endocarp; bioenergy
- Issue Date
- BIOTECHNOLOGY FOR BIOFUELS
- VOL 4, 43-1-43-13
- Background: Lignin is a highly abundant biopolymer synthesized by plants as a complex component of plant secondary cell walls. Efforts to utilize lignin-based bioproducts are needed.
Results: Herein we identify and characterize the composition and pyrolytic deconstruction characteristics of highlignin feedstocks. Feedstocks displaying the highest levels of lignin were identified as drupe endocarp biomass arising as agricultural waste from horticultural crops. By performing pyrolysis coupled to gas chromatography-mass spectrometry, we characterized lignin-derived deconstruction products from endocarp biomass and compared these with switchgrass. By comparing individual pyrolytic products, we document higher amounts of acetic acid, 1-hydroxy-2-propanone, acetone and furfural in switchgrass compared to endocarp tissue, which is consistent with high holocellulose relative to lignin. By contrast, greater yields of lignin-based pyrolytic products such as phenol, 2-methoxyphenol, 2-methylphenol, 2-methoxy-4-methylphenol and 4-ethyl-2-methoxyphenol arising from drupe endocarp tissue are documented.
Conclusions: Differences in product yield, thermal decomposition rates and molecular species distribution among the feedstocks illustrate the potential of high-lignin endocarp feedstocks to generate valuable chemicals by thermochemical deconstruction.
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