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| Autocatalytic Ethanol Pulping of Bambusa Pervariabilis and Kinetic Analysis of Lignin Degradation |
| Received:December 17, 2021 |
| DOI：10.11981/j.issn.1000-6842.2023.01.38 |
| Key Words:Bambusa pervariabilis;autocatalytic ethanol pulping;lignin degradation kinetics;lignin activation energy |
| Fund Project:兴辽英才计划特聘教授项目（XLYC1802025）。 |
| Author Name | Affiliation | Postcode | | FANG Han* | School of Light Industry and Chemical Engineering， Dalian University of Technology， Dalian， Liaoning Province， 116034 | 116034 | | NIU Meihong | School of Light Industry and Chemical Engineering， Dalian University of Technology， Dalian， Liaoning Province， 116034 | 116034 | | PING Qingwei | School of Light Industry and Chemical Engineering， Dalian University of Technology， Dalian， Liaoning Province， 116034 | 116034 | | ZHANG Jian | School of Light Industry and Chemical Engineering， Dalian University of Technology， Dalian， Liaoning Province， 116034 | 116034 | | SHENG Xueru | School of Light Industry and Chemical Engineering， Dalian University of Technology， Dalian， Liaoning Province， 116034 | 116034 | | LI Na | School of Light Industry and Chemical Engineering， Dalian University of Technology， Dalian， Liaoning Province， 116034 | 116034 | | SHI Haiqiang | School of Light Industry and Chemical Engineering， Dalian University of Technology， Dalian， Liaoning Province， 116034 | 116034 |
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| Abstract: |
| The effects of insulation temperature and time on the yield of crude pulp， dissolution of lignin and other components， and conversion rate of lignin in the process of autocatalytic ethanol pulping of Bambusa pervariabilis were studied， during which the degradation kinetics of lignin was investigated. The results showed that the higher the temperature， the greater the conversion rate of lignin during the first 90 min of insulation； the removal of other components from pulp mainly occurred during the first 150 min of insulation with an increase along with increase in the temperature. The degradation of lignin conformed to the first-order reaction and could be divided into three stages： mass delignification （first 60 min of insulation）， small amount of delignification （60~120 min）， and residual delignification （120~210 min） with activation energies of 24.23， 129.1， and 328.8 kJ/mol， respectively. |
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