In this study, new results of comparative research on autothermal reforming(ATR) of biofuels (hydrodeoxygenated biodiesel and long- stored biodiesel) over composite RhSC catalysts (0.24 wt.% Rh supported on structured Ce_0.75Zr_0.25O_2-δ-ƞ-Al₂O₃/FeCrAl carrier) were obtained. The impact of fuel chemical composition on the catalyst performance was discussed. Hydrodeoxygenated biodiesel mainly consisted of heptadecane, other normal alkanes and small amounts of alkenes together with a portion of unreacted fatty acid ethers. RhSC exhibited syngas productivity of about 2.5 m³L_cat⁻¹ h⁻¹ (STP) at complete conversion of hydrodeoxygenated biodiesel without considerable by-products formation, at molar ratios O₂/C = 0.54, H₂O/C = 3, T =750 °C and GHSV =5000 h⁻¹. The catalyst exhibited stable operation and no coke formation for at least 90 h on stream.

Biodiesel after nine years storage, which was used in this study, contained methyl esters of saturated and unsaturated fatty acids and a large proportion of polymeric compounds. It was successfully demonstrated that even this aged biodiesel can be converted to synthesis gas over the developed Rh/Ce_0.75Zr_0.25O_2-δ-ƞ-Al₂O₃/FeCrAl structured catalyst. Further optimization of the catalyst and reaction conditions (higher temperature, lower GHSV, catalyst doping by promoters) is required for reaching efficient reforming of the aged biodiesel. Nevertheless, it was demonstrated that biodiesel and hydrodeoxygenated biodiesel, which combine high energy density and renewability, were very attractive biofuels for fuel cell-based power unit applications.

在本研究中，在复合 RhSC 催化剂（0.24 wt.% Rh 负载在结构化 Ce _0.75 Zr _0.25 O _2-δ -ƞ-获得Al ₂ O ₃ /FeCrAl载体)。讨论了燃料化学成分对催化剂性能的影响。加氢脱氧生物柴油主要由十七烷、其他正构烷烃和少量烯烃以及部分未反应的脂肪酸醚组成。RhSC 表现出约 2.5 m ³ L _cat ^-1 h ^{-1 的}合成气生产率(STP) 在完全转化加氢脱氧生物柴油时没有形成大量副产物，摩尔比为 O ₂ /C = 0.54，H ₂ O/C = 3，T =750°C 和 GHSV =5000 h ^-1。该催化剂表现出稳定的操作，并且在运行中至少 90 小时没有形成焦炭。

本研究中使用的储存 9 年后的生物柴油含有饱和和不饱和脂肪酸的甲酯和大部分聚合物。已成功证明，即使是这种老化的生物柴油也可以通过开发的 Rh/Ce _0.75 Zr _0.25 O _2-δ -ƞ-Al ₂ O ₃转化为合成气/FeCrAl 结构催化剂。需要进一步优化催化剂和反应条件（更高的温度、更低的 GHSV、助催化剂掺杂的催化剂）以实现老化生物柴油的有效重整。然而，事实证明，结合高能量密度和可再生性的生物柴油和加氢脱氧生物柴油对于基于燃料电池的动力装置应用来说是非常有吸引力的生物燃料。