Abstract This paper presents the catalytic activity of ruthenium phosphides supported on SBA-15 material as hydrodesulfurization (HDS) catalysts of gasoline model compounds. It was studied the influence of the P/Ru molar ratio of 0.5, 1, 2, 3, and 4.5 (samples were labeled as 0.5-P/Ru, 1-P/Ru, 2-P/Ru, 3-P/Ru and 4.5-P/Ru) in the hydrodesulfurization of 3-methyl-thiophene as a model molecule and evaluated under mild reaction conditions. The ruthenium phosphide phase was synthesized from a conventional phosphate reduction method using RuCl3 and (NH4)2HPO4 as precursors. The catalysts were characterized by XRPD, N2 adsorption–desorption isotherms, TEM, EDS, XPS, NH3-TPD, H2-TPD and CO chemisorption. All catalysts maintained the mesoporous structure characteristic of the SBA-15 support, although pore blockage occurred at high P loadings. TEM images and EDS mapping showed well dispersed active phosphide phases, mainly RuP and Ru2P, as evidenced by XRPD. 3-P/Ru catalyst became to be the most active in the HDS reaction, with a high isomerization ability, which was assigned to its medium acidity and higher amount of active species on the surface that activates H2 species.

中文翻译：

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活性磷化钌作为汽油模型化合物的选择性脱硫催化剂

摘要 本文介绍了负载在 SBA-15 材料上的磷化钌作为汽油模型化合物加氢脱硫 (HDS) 催化剂的催化活性。研究了 P/Ru 摩尔比为 0.5、1、2、3 和 4.5（样品标记为 0.5-P/Ru、1-P/Ru、2-P/Ru、3-P/ Ru 和 4.5-P/Ru) 在 3-甲基-噻吩的加氢脱硫中作为模型分子并在温和的反应条件下进行评估。磷化钌相是通过使用 RuCl3 和 (NH4)2HPO4 作为前体的常规磷酸盐还原方法合成的。催化剂的特征在于 XRPD、N2 吸附-解吸等温线、TEM、EDS、XPS、NH3-TPD、H2-TPD 和 CO 化学吸附。所有催化剂都保持了 SBA-15 载体的中孔结构特征，尽管在高 P 负载下会发生孔堵塞。XRPD 证明，TEM 图像和 EDS 映射显示了分散良好的活性磷化物相，主要是 RuP 和 Ru2P。3-P/Ru 催化剂成为 HDS 反应中最活跃的催化剂，具有较高的异构化能力，这归因于其中等酸性和表面上较高数量的活性物质，可激活 H2 物质。