A renewable lipid source for biolubricant feedstock oil from housefly (Musca domestica) larva
A renewable lipid source for biolubricant feedstock oil from housefly (Musca domestica) larva
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DOI：
10.1016/j.renene.2017.05.094
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发表时间：
2017-12
期刊：
影响因子：
8.7
通讯作者：
Sheng-qing Wu;Cai Zizhe;Yi Niu;Zheng Dong;He Guorui;Yong Wang;Depo Yang
中科院分区：
文献类型：
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作者：
Sheng-qing Wu;Cai Zizhe;Yi Niu;Zheng Dong;He Guorui;Yong Wang;Depo Yang
生物润滑剂由于其低毒性、高生物降解性和与添加剂的相容性而受到越来越多的关注。这些特性使其成为润滑的理想选择，尤其是在全损耗过程中。在这项研究中，家蝇幼虫（Musca acutica）被用作低成本，非食品生物润滑剂的饲料。以具有63 mg KOH/g的高酸值（AV）的幼虫脂质为原料进行酯化以制备2-乙基己基脂肪酸酯（2-EH酯）。我们开发了一种生产高纯度2-EH酯的方法，其中家蝇幼虫游离脂肪酸（HLFFA）来自幼虫喂养的厨房垃圾。用苯磺酸（BSA）催化HLFFA与2-乙基-1-己醇（2-EHOH）酯化。结果表明，最佳酯化工艺条件为：催化剂用量0.5wt%，n（2-EHOH）：n（HLFFA）= 3：1，反应温度130 °C，反应时间2 h。在此条件下酯化率可达98.6%。在80 Pa和110 ℃下通过分子蒸馏除去过量的2-EHOH。残余脂肪酸通过碱精制中和。还测试了所产生的高纯度2-EH酯（>99.7%）的化学和物理性质，包括摩擦学性质。
Biolubricants are gaining increased attention because of their low toxicity, high biodegradability, and miscibility with additives. These features render them ideal for lubrication, especially in total-loss processes. In this study, housefly (Musca domestica) larvae were used as low-cost, non-food biolubricant feedstock. A larval lipid with high acid value (AV) of 63 mg KOH/g was used as feedstock for esterification to produce 2-ethylhexyl fatty acid esters (2-EH esters). We developed a method of producing high-purity 2-EH esters in which housefly larva free fatty acids (HLFFAs) were derived from larvae fed with kitchen waste. HLFFAs were esterified with 2-ethyl-1-hexanol (2-EHOH) catalysed with benzenesulfonic acid (BSA). The optimum esterification conditions were as follows: catalyst loading, 0.5 wt%; 2-EHOH-to-HLFFAs molar ratio, 3:1; temperature, 130 °C; and reaction time, 2 h. These conditions yielded 98.6% esterification rate. Excess 2-EHOH was removed by molecular distillation at 80 Pa and 110 °C. Residual fatty acids were neutralised by alkali refining. The chemical and physical properties, including the tribological properties, of the produced high-purity 2-EH esters (>99.7%) were also tested.