AI Article Synopsis
- The study compares ionic liquid (IL) and ammonia fiber expansion (AFEX) pretreatments on biomass, focusing on their effects on structure, composition, and enzymatic breakdown.
- AFEX retains plant carbohydrates while IL removes 76% of hemicellulose, disrupting the corn stover's crystal structure during the process.
- Both methods achieve over 70% sugar yield in 48 hours, but IL pretreatment is more efficient in enzyme use and hydrolysis time, revealing individual strengths and weaknesses of the two approaches.
Article Abstract
Ionic liquid (IL) and ammonia fiber expansion (AFEX) pretreatments were studied to develop the first direct side-by-side comparative assessment on their respective impacts on biomass structure, composition, process mass balance, and enzymatic saccharification efficiency. AFEX pretreatment completely preserves plant carbohydrates, whereas IL pretreatment extracts 76% of hemicellulose. In contrast to AFEX, the native crystal structure of the recovered corn stover from IL pretreatment was significantly disrupted. For both techniques, more than 70% of the theoretical sugar yield was attained after 48 h of hydrolysis using commercial enzyme cocktails. IL pretreatment requires less enzyme loading and a shorter hydrolysis time to reach 90% yields. Hemicellulase addition led to significant improvements in the yields of glucose and xylose for AFEX pretreated corn stover, but not for IL pretreated stover. These results provide new insights into the mechanisms of IL and AFEX pretreatment, as well as the advantages and disadvantages of each.
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| http://dx.doi.org/10.1016/j.biortech.2011.04.005 | DOI Listing |
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