期刊
BIOFUELS BIOPRODUCTS & BIOREFINING-BIOFPR
卷 13, 期 3, 页码 635-659出版社
WILEY
DOI: 10.1002/bbb.1975
关键词
mixed biomass feedstock; transportation; storage; biomass blending; biochemical conversion; fermentable sugars; supply chain analysis
资金
- Clean Energy Manufacturing Analysis Center (CEMAC), US Department of Energy (DOE)
- Department of Mechanical Engineering, Colorado State University
- US Department of Energy (DOE) [DE-AC36-08GO28308]
- US Department of Energy Office of Energy Efficiency and Renewable Energy, Bioenergy Technologies Office
- US Department of Energy, Office of Science, Office of Biological and Environmental Research [DE-AC02-05CH11231]
The sustainable supply of high-quality, low-cost biomass feedstock to cellulosic biorefineries is still a challenge. Utilizing corn stover as the single feedstock to a biorefinery also poses a source of risk to seasonal feedstock availability, affordability, and sustainability. Implementing a year-round feedstock switching strategy or utilizing an optimal mixture of corn stover, miscanthus, and switchgrass is demonstrated to diminish these concerns while reducing the cost of sugar production by as much as 3.8% and 13.6%, respectively, when compared to a baseline sugar price of 441.9 $ metric ton(-1) (t) attributed to a fixed corn stover feedstock basis. This study determines that a mixing ratio of corn stover, miscanthus, and switchgrass of 36%, 50%, and 14%, respectively, minimizes the selling price of sugar. If miscanthus is sufficiently available in the future, its fraction could be further increased to 70% by reducing the fraction of corn stover. We find that the mixed feedstock considered in this study reduces the nutrient replacement and feedstock transportation costs and improves the quality of feedstock (determined by total carbohydrates and ash) relative to corn stover alone. Results suggest that a high-quality feedstock with a high carbohydrate content is an important metric for consideration, beyond strictly the feedstock cost, to reduce the selling price of sugar and its uncertainties. In the future this may be supported by the increased availability of higher carbohydrate feedstocks such as miscanthus. (c) 2019 Society of Chemical Industry and John Wiley & Sons, Ltd.
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