Abstract The influence of addition of amines (hexylamine, tripropylamine, dodecylamine, and hexadecylamine) and dopants (Zr, Ce) on the properties of mesostructured aluminas (MAs) synthesized using either Tergitol 15-S-9 or Triton X-114 surfactants was investigated. Selected MAs were evaluated as supports for Co and Ru-Co catalysts and their Fischer-Tropsch synthesis (FTS) performance assessed at 493 K, 2.0 MPa, and H2/CO = 2. The materials were characterized by XRD, N2 sorption, TG-DTG, EA, XPS, H2-TPR, H2 chemisorption, and STEM. Regardless of the surfactant, all amines enlarged the pore size of undoped MAs by ca. 2–3 nm. The impact of amines on BET area and pore volume depended, however, on the surfactant-amine combination and on the presence and concentration of dopants. The Ru-promoted catalyst supported on the MA synthesized with Tergitol-tripropylamine doped with Zr displayed the highest FTS activity and C5+ selectivity due to both high cobalt reducibility and optimum particle size (8 nm).

中文翻译：

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胺对介孔结构氧化铝合成和性能的影响以及作为钴基费托合成催化剂载体的评估

摘要 研究了添加胺（己胺、三丙胺、十二胺和十六胺）和掺杂剂（Zr、Ce）对使用 Tergitol 15-S-9 或 Triton X-114 表面活性剂合成的介孔结构氧化铝 (MAs) 性能的影响. 选定的 MA 被评估为 Co 和 Ru-Co 催化剂的载体，并在 493 K、2.0 MPa 和 H2/CO = 2 下评估了它们的费托合成 (FTS) 性能。材料通过 XRD、N2 吸附、TG- DTG、EA、XPS、H2-TPR、H2 化学吸附和 STEM。无论使用何种表面活性剂，所有胺类都将未掺杂 MA 的孔径扩大了约 2 倍。2–3 纳米。然而，胺对 BET 面积和孔体积的影响取决于表面活性剂-胺的组合以及掺杂剂的存在和浓度。