Abstract In this work, a new potential route to convert free fatty acids to long chain nitriles and fuel gas (H2/hydrocarbon) intermediated by Fe nitrate is proposed. Precursors based on Fe3+/RCOO-/NO3- were prepared by mixing Fe nitrate and oleic acid at the molar ratios 1:1 and 1:3. After pyrolytic decomposition at 550 °C, these precursors yielded three fractions, i.e. solid (8−27 wt%), liquid (22−51 wt%) and gaseous (41−51 wt%). TG, XRD, SEM, Raman, Mossbauer, CHN analyses of the solid products showed the presence of 25–52% carbon with reduced iron oxides (Fe3O4 and FeO). Analyses of the liquid fraction by GCMS, 1H/13C–NMR, CHN and FTIR clearly indicated the formation of nitriles as the main products, with selectivity of ca. 80 % and small amounts of hydrocarbons and ketones. A large gas fraction composed mainly by hydrogen and hydrocarbons (especially C3) was also formed.

中文翻译：

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一种新的热解工艺，有可能将游离脂肪酸转化为长链腈和硝酸铁介导的 H2

摘要 在这项工作中，提出了一种将游离脂肪酸转化为长链腈和以硝酸铁为中间体的燃料气（H2/烃）的潜在途径。通过将硝酸铁和油酸以 1:1 和 1:3 的摩尔比混合来制备基于 Fe3+/RCOO-/NO3- 的前体。在 550 °C 下热解后，这些前体产生三个部分，即固体 (8-27 wt%)、液体 (22-51 wt%) 和气态 (41-51 wt%)。固体产物的 TG、XRD、SEM、拉曼、穆斯堡尔、CHN 分析表明存在 25-52% 的碳和还原的氧化铁（Fe3O4 和 FeO）。通过 GCMS、1H/13C-NMR、CHN 和 FTIR 对液体馏分的分析清楚地表明主要产物是腈的形成，选择性约为 80% 和少量的碳氢化合物和酮。