Different alumina-supported metal sulfides catalysts were studied for the H₂S oxidative decomposition reaction to simultaneously obtain sulfur and hydrogen in the presence of CH₄. Mono and bimetallic catalysts were prepared, characterized, and tested at 1273 K by varying the contact time. X-ray diffraction and Raman evidenced a good dispersion of the Mo, Fe, and Co sulfide species on the Al₂O₃ support. From the experimental results, it was argued that Mo sulfide species are the active phases able to inhibit the formation of SO₂, while the Fe sulfide species promote the selective abatement of COS and CS₂ obtained because of the presence of CH₄ in the gaseous feed stream. The bimetallic sample containing both Mo and Fe sulfide species (5Fe-10Mo/Al₂O₃) exhibited very interesting catalytic performances since it allowed us to achieve a H₂ yield, CH₄, and H₂S conversion very close to the equilibrium values and the complete removal of sulfur compounds at low contact times.

中文翻译：

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金属硫化物基催化剂在 CH4 存在下的 H2S 氧化分解反应：初步研究

研究了不同氧化铝负载的金属硫化物催化剂在CH ₄存在下的H ₂ S氧化分解反应同时获得硫和氢。通过改变接触时间，在 1273 K 下制备、表征和测试单金属和双金属催化剂。X 射线衍射和拉曼光谱证明了 Mo、Fe 和 Co 硫化物物质在 Al ₂ O ₃载体上的良好分散。从实验结果来看，Mo硫化物物种是能够抑制SO ₂形成的活性相，而Fe硫化物物种促进了由于CH ₄的存在而获得的COS和CS ₂的选择性减少在气态进料流中。含有 Mo 和 Fe 硫化物（5Fe-10Mo/Al ₂ O ₃）的双金属样品表现出非常有趣的催化性能，因为它使我们能够实现非常接近平衡值的 H ₂产率、CH ₄和 H ₂ S 转化率并且在低接触时间完全去除硫化合物。