Corn stover availability for biomass conversion: situation analysis |
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Authors: | J Richard Hess Kevin L Kenney Christopher T Wright Robert Perlack Anthony Turhollow |
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Institution: | (1) Idaho National Laboratory, Idaho Falls, ID 83415, USA;(2) Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA |
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Abstract: | As biorefining conversion technologies become commercial, feedstock availability, supply system logistics, and biomass material
attributes are emerging as major barriers to the availability of corn stover for biorefining. While systems do exist to supply
corn stover as feedstock to biorefining facilities, stover material attributes affecting physical deconstruction, such as
densification and post-harvest material stability, challenge the cost-effectiveness of present-day feedstock logistics systems.
In addition, the material characteristics of corn stover create barriers with any supply system design in terms of equipment
capacity/efficiency, dry matter loss, and capital use efficiency. However, analysis of a conventional large square bale corn
stover feedstock supply system concludes that (1) where other agronomic factors are not limiting, corn stover can be accessed
and supplied to a biorefinery using existing bale-based technologies, (2) technologies and new supply system designs are necessary
to overcome biomass bulk density and moisture material property challenges, and (3) major opportunities to improve conventional
bale biomass feedstock supply systems include improvements in equipment efficiency and capacity and reducing biomass losses
in harvesting, collection, and storage. Finally, the backbone of an effective stover supply system design is the optimization
of intended and minimization of unintended material property changes as the corn stover passes through the individual supply
system processes from the field to the biorefinery conversion processes.
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Keywords: | Feedstock logistics Corn stover Harvesting Collection Storage Preprocessing Transportation |
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