根据极性和分子大小分化生物油:作为抗氧化剂的表征和应用
Isabel Fonts1, Cristina Lázaro1, Alfonso Cornejo2
1Aragon Institute for Engineering Research (I3A), Thermochemical Processes Group (GPT), University of Zaragoza, 50018 Zaragoza, Spain.
概括
这项研究将生物油分成部分,以分离抗氧化剂的化合物. 较低分子量分数显示出生物柴油应用中最好的抗氧化潜力.
科学领域:
- 生物质的价值化 生物质的价值化
- 绿色化学 绿色化学
- 可再生能源可再生能源是可再生能源.
背景情况:
- 来自生物质热解的生物油是一种有前途的可再生资源.
- 升级和精炼生物油对于其多样化的应用至关重要.
- 生物油中的抗氧化化合物可以提高燃料稳定性.
研究的目的:
- 开发一种基于极性和分子大小的生物油分离方法.
- 提取和表征具有抗氧化性能的和多化合物.
- 评估不同生物油分量的抗氧化潜力,以稳定生物柴油.
主要方法:
- 使用溶剂提取和尺寸排除色谱 (SEC) 的生物油分化.
- 使用气体染色学-质谱学 (GC/MS),里埃变换红外光谱学 (FTIR),紫外可见光谱学 (UV-vis) 和核磁共振 (NMR) 技术 (DOSY-NMR,13C-NMR,31P-NMR) 分析部分.
- 通过测量生物柴油氧化稳定性的改善来评估抗氧化性质.
主要成果:
- 成功地将生物油分成基于极性和分子重量的不同部分.
- 鉴定结构,特别是单体和二体,作为抗氧化活性的关键贡献者.
- 与原始生物油相比,较低分子量分数表现出优越的抗氧化能力.
- 较高分子量分数由于基含量较低,导致抗氧化能力降低.
- 含有类寡合体的不溶于水/二甲不溶于水的部分,尽管溶度有限,但显示出显著的抗氧化潜力.
结论:
- 生物油分化是一种有效的策略,用于分离高价值的抗氧化化合物.
- 化合物的分子量和化学功能 (特别是基) 决定了它们的抗氧化功效.
- 低分子量化合物和某些寡合物是生物柴油稳定性的有希望的抗氧化剂.
- 对这些分量的可溶性和应用的进一步研究可以释放它们在可再生能源中的全部潜力.
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