|
二维码（扫一下试试看！） |
| Effects of Combined Hydrothermal-acid DES Pretreatment on the Physicochemical Properties and Enzymatic Hydrolysis of Paulownia |
| Received:December 19, 2024 |
| DOI：10.11980/j.issn.0254-508X.2025.05.001 |
| Key Words:hydrothermal pretreatment deep eutectic solvent Paulownia xylose enzymatic hydrolysis |
| Fund Project:国家自然科学基金（32071717）。 |
| Author Name | Affiliation | Postcode | | CHEN Aini* | College of Materials Science and Technology, Beijing Key Lab of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083 | 100083 | | SUN Lili | College of Materials Science and Technology, Beijing Key Lab of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083 | 100083 | | HAN Ying | China National Pulp and Paper Research Institute Co., Ltd., Beijing, 100102 | 100102 | | CAO Xuefei | College of Materials Science and Technology, Beijing Key Lab of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083 | 100083 | | SUN Shaoni* | College of Materials Science and Technology, Beijing Key Lab of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083 | 100083 |
|
| Hits: 3192 |
| Download times: 1001 |
| Abstract:The hydrothermal combined with acidic deep eutectic solvent （DES） treatments were used to pretreat Paulownia to obtain high xylose yield and enzymatic hydrolysis efficiency. Firstly， tartaric acid （TA） assisted hydrothermal pretreatment was utilized to treat Paulownia. The effects of temperature （120~160 ℃）， time （15~120 min）， and TA quality fraction （0~10%） on xylose yield were investigated. Subsequently， the hydrothermal residue was subjected to post-treatment with deep eutectic solvent （DES） composed of choline chloride and lactic acid operated at 90~150 ℃ for 2~8 h. The results show that the optimal hydrothermal pretreatment conditions were 140 ℃， 60 min and quality fraction 4% TA， resulting in a maximum xylose yield of 80.5%.the combined hydrothermal and DES treatments effectively removed hemicellulose and lignin， leading to increased crystallinity， surface roughness， specific surface area and accessibility of the treated Paulownia. The optimal DES post-treatment conditions were determined to be 130 ℃ for 6 h. Under the optimal treatment conditions， the removal rates of hemicellulose and lignin reached 100% and 89.7%， respectively， with a cellulose retention rate of 77.3% and an enzymatic hydrolysis efficiency of 85.2%， which was 4.6 times higher than that of Paulownia. |
| View Full Text HTML View/Add Comment Download reader |
|
|
|