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| Study on Purification and Thermal Stability of Ethanol Oligosaccharides from Corn Stover |
| Received:March 13, 2023 Revised:April 11, 2023 |
| DOI：10.11981/j.issn.1000-6842.2024.01.123 |
| Key Words:corn stover oligosaccharides;ethanol pulping;thermal stability;oligosaccharide purification |
| Fund Project:兴辽英才计划科技创新领军人才（XLYC1802025）。 |
| Author Name | Affiliation | Postcode | | SHEN Qiu | Scholl of Light Industry and Chemical Engineering， Dalian Polytechnic University， Dalian， Liaoning Province， 116034 | 116034 | | PING Qingwei* | Scholl of Light Industry and Chemical Engineering， Dalian Polytechnic University， Dalian， Liaoning Province， 116034 | 116034 | | ZHANG Jian | Scholl of Light Industry and Chemical Engineering， Dalian Polytechnic University， Dalian， Liaoning Province， 116034 | 116034 | | SHENG Xueru | Scholl of Light Industry and Chemical Engineering， Dalian Polytechnic University， Dalian， Liaoning Province， 116034 | 116034 | | LI Na | Scholl of Light Industry and Chemical Engineering， Dalian Polytechnic University， Dalian， Liaoning Province， 116034 | 116034 |
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| Abstract: |
| In this study， ethanol oligosaccharides extracted from the waste liquid of corn stover ethanol pulping as raw materials were purified by resins， and fractionated to obtain the components with molecular weight of 200~1000 D. By testing the thermal stability of oligosaccharides at different heating rates and calculating by nonlinear fitting， the pyrolysis activation energy （E） and pre-exponential factors （lnA） of oligosaccharides were obtained. The results showed that the decomposition temperature range of purified and fractionated oligosaccharides was 160~300 ℃ under non-isothermal procedures， and the thermal stability of oligosaccharides decreased when the ash content increased. The E values of unpurificated oligosaccharides O0， desalinated oligosaccharides B0， decolorized oligosaccharides C0 and desalinated and decolorized oligosaccharides D0 after fractionation were 46.52， 60.55， 43.12 and 52.28 kJ/mol， respectively， and the pre-exponential factors （lnA） were 4.03， 7.70， 2.98 and 5.47 min-1， respectively. This study and results could provide reference for the purification and the selection of technological parameters. |
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