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对氧化态和硫化态的Fe-Mo/Al_2O_3加氢脱硫催化剂进行了Mossbauer谱学的研究。催化剂样品主要含有Fe_2(MoO_4)_3和α-FeOOH。负载于γ-AlOOH后,Mossbauer谱产生明显变化。硫化后,得到Fe_(1-x)S的磁分裂谱,并在中间部分叠加了一个δ=0.35mm/s,△=0.78mm/s的双峰。由于这组双峰的出现是以Mo的存在为条件,并伴随着噻吩加氢脱硫明显的催化活性的出现,故说明存在着(Fe-Mo-S)活性相。
The Mossbauer spectra of Fe-Mo / Al 2 O 3 hydrodesulfurization catalysts in the oxidized and sulphided states were investigated. The catalyst samples mainly contain Fe 2 (MoO 4) 3 and α-FeOOH. After loading on γ-AlOOH, the Mossbauer spectrum produced a significant change. After vulcanization, a magnetic split spectrum of Fe 1-x S was obtained, and a double peak of δ = 0.35 mm / s and Δ = 0.78 mm / s was superimposed in the middle part. As the presence of these bimodals is based on the presence of Mo, accompanied by the apparent catalytic activity of thiophene hydrodesulfurization, the presence of the (Fe-Mo-S) active phase is demonstrated.