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以二苯并噻吩为模型化合物,在浆态反应釜中考察了吲哚对NiMo/γ-Al2O3催化剂加氢脱硫性能的影响.用微库仑仪、气相色谱—质谱联用仪对反应中的样品进行含硫量和组分分析,并对反应前后的催化剂进行性能表征.结果表明,加入吲哚在一定程度上提高了活化阶段的反应速率,但显著降低了活化后的反应速率,导致加氢脱硫总体活性显著下降,脱硫率由70%降到约58%.反应前后催化剂表面形貌和活性相晶体结构均无明显变化,但比表面积有所增加.加入吲哚导致催化剂孔径减小约12%,积碳量增加约50%.组分分析表明,加入吲哚后反应中生成的环己基苯显著减少,加氢路径受到抑制.
The effects of indole on the hydrodesulfurization performance of NiMo / γ-Al2O3 catalysts were investigated in a slurry reactor using dibenzothiophene as a model compound.The microcosms and gas chromatography-mass spectrometry The sulfur content and component analysis were carried out, and the performance of the catalyst before and after the reaction was characterized.The results showed that the addition of indole increased the reaction rate in the activation stage to a certain extent, but significantly reduced the reaction rate after activation, resulting in hydrogenation The overall activity of desulfurization decreased significantly, and the desulfurization rate decreased from 70% to 58%. The surface morphology of the catalyst before and after the reaction and the crystal structure of the active phase did not change significantly, but the specific surface area increased. The addition of indole reduced the catalyst pore size by about 12 %, And the amount of carbon deposition increased by about 50% .Component analysis showed that the cyclohexylbenzene generated in the reaction after indole addition significantly reduced, and the hydrogenation pathway was inhibited.