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Title: Effect of pelleting process variables on physical properties and sugar yields of ammonia fiber expansion pretreated corn stover

Pelletization process variables including grind size (4, 6 mm), die speed (40, 50, 60 Hz), and preheating (none, 70 degrees C) were evaluated to understand their effect on pellet quality attributes and sugar yields of ammonia fiber expansion (AFEX) pretreated biomass. The bulk density of the pelletized AFEX corn stover was three to six times greater compared to untreated and AFEX-treated corn stover. Also the durability of the pelletized AFEX corn stover was >97.5% for all pelletization conditions studied except for preheated pellets. Die speed had no effect on enzymatic hydrolysis sugar yields of pellets. Pellets produced with preheating or a larger grind size (6 mm) had similar or lower sugar yields. Pellets generated with 4 mm AFEX-treated corn stover, a 60 Hz die speed, and no preheating resulted in pellets with similar or greater density, durability, and sugar yields compared to other pelletization conditions.
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Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 0960-8524
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Bioresource Technology; Journal Volume: 164
Research Org:
Idaho National Laboratory (INL)
Sponsoring Org:
Country of Publication:
United States
09 BIOMASS FUELS; AFEX; biomass; corn stover; densification; enzymatic hydrolysis; pellet; pretreatment; sugar yield