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Cellulose Digestibility, Ethanol Yield, and Lignin Recovery from Corn Stover Fractionated by a Two-Stage Dilute-Acid and Dilute-Alkaline Process
| Content Provider | Semantic Scholar |
|---|---|
| Author | Joiner, David A. |
| Copyright Year | 2005 |
| Abstract | The NREL PCS and HWI-PCS have been extracted with dilute sodium hydroxide in batch using a hot caustic rinse and hot water wash after the extraction. The results from enzymatic hydrolysis (Fig. III-1) show that the treated samples have good cellulose digestibility with glucose yields of 86% to 96% after 24 hours with 7 FPU/g glucan Spezyme CP loading (Lot no. 301-003480257), as compared with the Avicel microcrystalline cellulose reference which has 53% digestibility at 24 hours. The samples exhibit similar hydrolysis trends, and the majority of the hydrolysis is complete after 24 hours for each of the samples tested while the digestibility profile of the Avicel reference is still increasing at 96 hours. The HWI-PCS has the highest overall cellulose digestibility and performs better than the caustic-extracted samples tested after 24 hours. For the delignified samples, both the overall cellulose digestibility and initial hydrolysis rates increase with increasing delignification. The PCS extracted directly by 0.8% NaOH at 70°C has similar digestibility as HWI-PCS extracted with 0.4% NaOH at 80°C since these two samples have similar compositions. Because the PCS is acidic with a pH of approximately 1.5, a portion of the NaOH is neutralized during the caustic extraction for the PCS sample that has not been first washed with water. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://etd.auburn.edu/bitstream/handle/10415/28/JOINER_DAVID_32.pdf?isAllowed=y&sequence=1 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
