Journal
BIOPROCESS AND BIOSYSTEMS ENGINEERING
Volume 38, Issue 1, Pages 149-154Publisher
SPRINGER
DOI: 10.1007/s00449-014-1253-y
Keywords
Corn stover; Particle size; Enzymatic hydrolysis; Inner surface area; SEM photograph
Funding
- Joint Training Program of Shanghai High School and ECUST
- National Basic Research Program of China [2011CB707406]
- National High-Tech Program of China [2012AA022301, 2014AA021901]
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Particle size of lignocellulose materials is an important factor for enzymatic hydrolysis efficiency. In this study, corn stover was milled and sieved into different size fractions from 1.42, 0.69, 0.34, to 0.21 mm, and the corresponding enzymatic hydrolysis yields were 24.69, 23.96, 25.34, and 26.97 %, respectively. The results indicate that the hydrolysis yield is approximately constant with changing corn stover particle sizes in the experimental range. The overall surface area and the inner pore size measurement show that the overall specific surface area was less than 2 % with the half reduction of particle size due to the greater inner pore surface area. The scanning electron microscope photographs gave direct evidence of the much greater inner pore surface area of corn stover particles. This result provided a reference when a proper size reduction of lignocellulose materials is considered in biorefining operations.
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