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| Efficient and Product-controlled Degradation of Lignin Using Transition Metal Sulfates Cooperated with Pd/C |
| Received:December 05, 2019 |
| DOI：10.11981/j.issn.1000-6842.2021.01.06 |
| Key Words:transition metal sulfate;Pd/C;lignin;product-controlled degradation;phenolic compound |
| Fund Project:福建省高校产学合作项目（2019H6008）。 |
| Author Name | Affiliation | Postcode | | WU Minya* | College of Environment and Resources， Fuzhou University， Fuzhou， Fujian Province， 350116 | 350116 | | LIU Minghua | College of Environment and Resources， Fuzhou University， Fuzhou， Fujian Province， 350116
Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology， Fuzhou， Fujian Province， 350116 | 350116 | | LIU Yifan | College of Environment and Resources， Fuzhou University， Fuzhou， Fujian Province， 350116
Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology， Fuzhou， Fujian Province， 350116 | 350116 | | LYU Yuancai | College of Environment and Resources， Fuzhou University， Fuzhou， Fujian Province， 350116
Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology， Fuzhou， Fujian Province， 350116 | 350116 |
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| Abstract: |
| In order to overcome several obstacles which limit the further development and utilization of degradation products existing in lignin catalytic degradation at present， such as poor product-controlled property， low yield of small molecule compounds， insufficient degree of uniformity， and difficulty for further utilization. NiSO4·6H2O cooperated with Pd/C was used to catalyze the degradation of corncob lignin in this study. The effects of transition metal ions， reaction temperature， reaction time， and synergistic effect of NiSO4·6H2O and Pd/C on lignin degradation ratio were investigated. Meantime， the degradation products and mechanism were analyzed. The results showed that NiSO4·6H2O cooperated with Pd/C could effectively improve the lignin degradation ratio. The degradation ratio was increased by 14.5%， and the yield of small molecules was improved by 39.9%. Especially， the yield of phenolic compounds was increased by 88.6% and the products uniformity was upgraded by 35.8% as well. Due to the properties of Lewis acid and the high electronegativity of Ni2+ in NiSO4·6H2O， the ether bonds of lignin could be cleaved on the acidic catalytic centers of Pd/C and NiSO4·6H2O effectively， and phenolic compounds were formed through the hydrogenation reaction. |
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