Facile synthesis of superficial Pd nanoparticles supported on carbonaceous SBA-15 (denoted as Pd/@SBA-15) as a new hydrotreating catalyst with enhanced activity and sulfur tolerance was accomplished for the production of partially hydrogenated fatty acid methyl esters (H-FAME), a high-quality biodiesel fuel enriched in monosaturated fatty acid methyl esters (mono-FAME) that can be used in high blends. Characterization, especially high-resolution electron microscopes and temperature-programmed techniques, indicated that the Pd nanoparticles (∼7 nm) formed spontaneously at the superficial area of carbonaceous SBA-15 with a hydrophobic surface and low acidity. In the synthesis of H-FAME using commercial palm oil-derived biodiesel fuel as a feedstock under mild conditions (<100 °C, 1 MPa), this new Pd/@SBA-15 catalyst offered high hydrotreating activity with excellent selectivity toward mono-FAME, especially the cis product, and high sulfur resistance, presumably due to fast diffusion and suitable interactions of the reactant and hydrogenated molecules through superficial Pd nanoparticles on the carbonaceous surfaces as the catalytically active sites. On the other hand, commercial Pd catalysts with Pd nanoparticles randomly impregnated inside the supporting materials showed lower activity in H-FAME synthesis and poorer selectivity toward saturated fatty acid methyl esters as undesirable products and lower sulfur tolerance level per Pd site, demonstrating the superiority of our system.

轻松合成了碳纳米管SBA-15（表示为Pd / @ SBA-15）作为新型加氢处理催化剂，具有增强的活性和耐硫性，负载了表面的Pd纳米颗粒，用于生产部分氢化的脂肪酸甲酯（H-FAME） ，是富含单饱和脂肪酸甲酯（mono-FAME）的高质量生物柴油燃料，可用于高掺混物中。表征，特别是高分辨率电子显微镜和程序升温技术表明，Pd纳米粒子（〜7 nm）在具有疏水表面和低酸度的碳质SBA-15的表面区域自发形成。在使用商业棕榈油衍生的生物柴油燃料作为原料在温和条件下（<100°C，1 MPa）合成H-FAME时，这种新型Pd / @ SBA-15催化剂具有很高的加氢处理活性，对单-FAME（尤其是顺式产物）具有优异的选择性，并且具有很高的抗硫性，这可能是由于反应物和氢化分子通过表面上的Pd纳米粒子在表面上扩散迅速以及适当的相互作用所致。碳质表面作为催化活性中心。另一方面，具有随机浸渍在载体材料中的Pd纳米颗粒的商业Pd催化剂在H-FAME合成中显示出较低的活性，并且对作为不希望有的产物的饱和脂肪酸甲酯的选择性较差，并且每个Pd位点的耐硫性较低，证明了Pd的优越性。我们的系统。大概是由于反应物和氢化分子通过碳质表面上的表面Pd纳米颗粒作为催化活性位点的快速扩散和适当的相互作用。另一方面，具有随机浸渍在载体材料中的Pd纳米颗粒的商业Pd催化剂在H-FAME合成中显示出较低的活性，并且对作为不想要的产物的饱和脂肪酸甲酯的选择性较差，并且每个Pd位点的耐硫性较低，这表明Pd的优越性。我们的系统。大概是由于反应物和氢化分子通过碳质表面上的表面Pd纳米颗粒作为催化活性位点的快速扩散和适当的相互作用。另一方面，具有随机浸渍在载体材料中的Pd纳米颗粒的商业Pd催化剂在H-FAME合成中显示出较低的活性，并且对作为不想要的产物的饱和脂肪酸甲酯的选择性较差，并且每个Pd位点的耐硫性较低，这表明Pd的优越性。我们的系统。