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| Degradation of Bagasse Alkaline Lignin by Catalytic Wet Air Oxidation with Five Catalysts |
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| DOI：10.11981/j.issn.1000-6842.2011.02.48 |
| Key Words:bagasse; alkaline lignin; catalytic wet air oxidation; catalyst |
| Fund Project:本课题为国家自然科学基金（30972324）资助项目。 |
| Author Name | Affiliation | | 姚向荣 | 华南理工大学制浆造纸工程国家重点实验室, 广东广州, 510640 | | 詹怀宇 | 华南理工大学制浆造纸工程国家重点实验室, 广东广州, 510640 | | 周生飞 | 华南理工大学制浆造纸工程国家重点实验室, 广东广州, 510640 |
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| Abstract: |
| In this paper, bagasse alkaline lignin was degraded by Catalytic Wet Air Oxidation (CWAO) with five different catalysts. The results showed that the main degradation products were: p-hydroxybenzaldehyde, vanillin, syringaldehyde, syringic acid, vanillic acid and acetosyringone. The concentration of aromatic substances increased when the reaction time increased. Catalysts had a significant effect on the concentration of aromatic substances. Using Co2O3 as catalyst, the concentration of vanillin, syringaldehyde and acetosyringone were 400.2 mg/L, 351.4 mg/L, and 248.7 mg/L respectively, and the concentration of vanillin increased 82.6% comparing to no catalyst was used. Using AQ as catalyst, the concentration of vanillin was 344.9 mg/L which was 1.5 times of that without using catalyst. Using Co2O3, CuSO4, MnO2, AQ, Fe2O3 as catalysts, the total concentrations of phenolic aldehyde compounds were 1696 mg/L, 1658 mg/L, 1584 mg/L, 1347 mg/L and 1250 mg/L respectively,which explained that using Co2O3 as the catalyst was the best, and CuSO4 and MnO2 were the next, the catalysts of AQ and Fe2O3 only contributed to produce several kinds of phenolic aldehyde compounds with small molecules. |
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