通过有机溶剂分离在二元性近接溶剂系统中改善利格宁去聚合的单产量
Yan Xu1, Qiqi Dai1, Danlu Zhang1
1School of Light Industry and Engineering, South China University of Technology, Guangzhou, 510640, China.
ChemSusChem
|April 4, 2024
概括
分裂素增强其同质性,从而产生更高的价值芳香化学物质,如酸化合物. 溶剂特性直接影响生物炼油应用中的素结构和脱聚合效率.
科学领域:
- 生物质转换生物质转换
- 化学工程是化学工程的重要组成部分.
- 可持续化学 可持续化学
背景情况:
- 氨酸的价值化是基纤维素生物质利用的关键.
- 素固有的异质性阻碍了高效的转化和产品产量.
- 生物炼油厂系统需要优化对高价值应用的红素加工.
研究的目的:
- 通过一步分离来增强木质素的均性.
- 通过THF/DMSO-EtONa系统研究分离木质素的脱聚合.
- 为了将溶剂特性与素结构和脱聚合结果相关联.
主要方法:
- 通过使用前离子和前离子溶剂的一步性素分离.
- 通过四二氧化/二甲基硫氧化-乙氧化去聚合分离的木质素.
- 对溶剂特性 (极性,结,粘度) 和它们对素结构的影响 (Mw,PDI,S/G比) 的分析.
主要成果:
- 甲醇分离的红素产生了30%的酸化合物,比未分离的红素增加了50%.
- 溶剂的极性,结合能力和粘度与分离素的分子量,PDI和S/G比率有很强的相关性.
- 溶剂特性与来自β-O-4键裂解的酸化合物的产量之间建立了明确的关系.
结论:
- 素分离显著提高了同质性和随后的转化效率.
- 溶剂性质是红素结构和脱聚合效率的关键决定因素.
- 这种方法为生物炼油厂中复杂的素聚合物的高价值利用提供了可行的策略.
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