To investigate the essential role of H₂ on thiophene removal over supported nickel catalysts, a NiO/Al₂O₃ catalyst was prepared, and a series of desulfurization reactions were carried out with different H₂ feed concentrations. The characterization of fresh and spent catalysts indicated that reduced nickel (Ni⁰), which showed dependence on the H₂ feed concentration, was the key factor to the thiophene reactive adsorption desulfurization (RADS) process. The equilibrium between sulfurization and reduction of nickel species retained the activity of the catalyst. The stability of the formed nickel sulfides was related to the H₂ feed concentration. The higher H₂ feed concentration favored the RADS process for the positive auto-regeneration of the nickel species.

为了研究H ₂对负载型镍催化剂上噻吩去除的重要作用，制备了NiO / Al ₂ O ₃催化剂，并在不同的H ₂进料浓度下进行了一系列脱硫反应。新鲜和废催化剂的表征表明，还原的镍（Ni ⁰）依赖于H ₂进料浓度，是噻吩反应吸附脱硫（RADS）过程的关键因素。硫化和镍物种还原之间的平衡保持了催化剂的活性。所形成的硫化镍的稳定性与H ₂进料浓度有关。高H₂进料浓度有利于RADS工艺实现镍物种的正自动再生。