从木质素-糠醛混合物中合成和表征用于生物柴油生产的碳凝胶微球。
Synthesis and characterization of carbon cryogel microspheres from lignin-furfural mixtures for biodiesel production.
机构信息
Chemical Reaction Engineering Group (CREG), Faculty of Chemical Engineering, Universiti Teknologi Malaysia, 81300 UTM Johor Darul Takzim, Malaysia.
Chemical Reaction Engineering Group (CREG), Faculty of Chemical Engineering, Universiti Teknologi Malaysia, 81300 UTM Johor Darul Takzim, Malaysia.
出版信息
Bioresour Technol. 2015 Aug;190:44-50. doi: 10.1016/j.biortech.2015.04.067. Epub 2015 Apr 23.
The aim of this work was to study the potential of biofuel and biomass processing industry side-products as acid catalyst. The synthesis of carbon cryogel from lignin-furfural mixture, prepared via sol-gel polycondensation at 90°C for 0.5h, has been investigated for biodiesel production. The effect of lignin to furfural (L/F) ratios, lignin to water (L/W) ratios and acid concentration on carbon cryogel synthesis was studied. The carbon cryogels were characterized and tested for oleic acid conversion. The thermally stable amorphous spherical carbon cryogel has a large total surface area with high acidity. Experimental results revealed the optimum FAME yield and oleic acid conversion of 91.3wt.% and 98.1wt.%, respectively were attained at 65°C for 5h with 5wt.% catalyst loading and 20:1 methanol to oleic acid molar ratio. Therefore, carbon cryogel is highly potential for heterogeneous esterification of free fatty acid to biodiesel.
本工作旨在研究生物燃料和生物质加工行业副产物作为酸催化剂的潜力。通过在 90°C 下进行溶胶-凝胶缩聚 0.5h 制备木质素-糠醛混合物，研究了用于生物柴油生产的碳气凝胶的合成。考察了木质素与糠醛（L/F）比、木质素与水（L/W）比和酸浓度对碳气凝胶合成的影响。对碳气凝胶进行了表征，并对油酸转化率进行了测试。热稳定的无定形球形碳气凝胶具有大的总表面积和高酸度。实验结果表明，在 65°C 下反应 5h，催化剂用量为 5wt.%，甲醇与油酸的摩尔比为 20:1 时，可获得 91.3wt.%的 FAME 产率和 98.1wt.%的油酸转化率。因此，碳气凝胶在游离脂肪酸的酯化为生物柴油的多相酯化反应中具有很大的潜力。
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