Abstract
AbstractBoron was introduced into nickel/acid‐treated bentonite (Ni/A‐Bn) catalysts to improve the anti‐coking ability of the nickel‐based catalyst in the hydrogenation of nitrobenzene. The results showed the B‐doped Ni/A‐Bn catalyst was more active than that without B. During an extended reaction period, Ni‐B/acid‐treated bentonite (Ni‐B/A‐Bn) resulted in a high nitrobenzene conversion and a high aniline selectivity. The lifetime of Ni‐B/A‐Bn was extended significantly compared with that of Ni/A‐Bn. The addition of B into Ni/A‐Bn decreased the NiO particle size, improved the dispersion of active components, and decreased carbon deposition. The combination of B and Ni prevented coke deposition on metallic Ni during nitrobenzene hydrogenation, which reduced carbon deposition on the surface of Ni‐B/A‐Bn.
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