Utilizing waste lipids to produce renewable diesel has received widespread attention, but the traditional preparation process is limited by rigorous reaction conditions or complex catalytic systems. This study reports a simple acid addition method to improve the conversion of higher fatty acids and/or higher fatty acid esters into long-chain alkanes under mild hydrothermal conditions over commercial Ru/C catalyst. The pretreatment of water-containing lipids, as well as the preparation process of complex catalysts are avoided, and the scope of applicable raw materials is expanded and the reaction system is simplified. This catalytic system is suitable for the conversion of most lipid materials into long-chain alkanes. Under the optimized conditions, stearic acid is converted completely with 97.85% selectivity of long-chain alkanes at 180 °C for 3 h. The catalytic system maintained excellent activity during the five repeated reactions.

利用废脂质生产可再生柴油已受到广泛关注，但传统的制备工艺受到反应条件苛刻或催化体系复杂的限制。该研究报告了一种简单的酸加成方法，可在温和的水热条件下通过商业 Ru/C 催化剂提高高级脂肪酸和/或高级脂肪酸酯向长链烷烃的转化率。避免了含水脂质的预处理，以及复杂催化剂的制备过程，扩大了适用原料的范围，简化了反应体系。该催化体系适用于将大多数脂质材料转化为长链烷烃。在优化条件下，硬脂酸在 180 °C 下 3 h 以 97.85% 的选择性长链烷烃完全转化。