Sulfur promoted nickel catalysts supported on MgAl₂O₄ and SiO₂ were investigated for the dehydrogenation of propane. The catalysts were prepared by the impregnation method using ammonium sulfate as the sulfiding agent. The catalysts were evaluated in both the sulfated form, NiO/MgAl₂O₄-20 wt%SO₄ and NiO/SiO₂-20 wt%SO₄, in addition to the reduced form, Ni/MgAl₂O₄-20 wt%SO₄ and Ni/SiO₂-20 wt%SO₄, which contained the sulfided species. Physicochemical properties of the catalysts were characterised by XRD, BET, TEM, TGA, NH₃-TPD, FTIR and TPR techniques to investigate the particle size, surface area, morphology, acidic properties and stability of the catalysts on both MgAl₂O₄ and SiO₂ supports. Structural and textural characterization of the catalysts revealed that NiO/MgAl₂O₄-20 wt%SO₄ and Ni/MgAl₂O₄-20 wt%SO₄ displayed highly dispersed particles in comparison to the catalysts on the SiO₂ support. H₂-TPR analysis showed that the reducibility of the smaller particles on the MgAl₂O₄ support was hindered. In addition, the stronger metal-support interactions on MgAl₂O₄ enhanced the stability of the catalyst which enables increased activity and facilitated the desorption of olefins, leading to a high selectivity of above 70 % for propylene.

研究了负载在 MgAl ₂ O ₄和 SiO ₂上的硫促进镍催化剂用于丙烷的脱氢。催化剂以硫酸铵为硫化剂，采用浸渍法制备。该催化剂在两个进行了评价的硫酸化形式，氧化镍/镁铝₂ ö ₄ -20％（重量）SO ₄和NiO /二氧化硅₂ -20％（重量）SO ₄，除了还原形式，镍/镁铝₂ ö ₄ -20重量%SO ₄和 Ni/SiO ₂ -20 wt%SO ₄，其中包含硫化物。通过XRD、BET、TEM、TGA、NH ₃ -TPD、FTIR和TPR技术对催化剂的物理化学性质进行了表征，以研究催化剂在MgAl ₂ O ₄和MgAl ₂ O ₄和SiO ₂支持。催化剂的结构和质地表征表明，与 SiO ₂载体上的催化剂相比，NiO/MgAl ₂ O ₄ -20 wt%SO ₄和 Ni/MgAl ₂ O ₄ -20 wt%SO ₄显示出高度分散的颗粒。H ₂-TPR 分析表明，较小颗粒在 MgAl ₂ O ₄载体上的还原性受到阻碍。此外，MgAl ₂ O ₄上更强的金属-载体相互作用增强了催化剂的稳定性，从而提高了活性并促进了烯烃的解吸，从而使丙烯的选择性高达 70% 以上。