催化学报 ›› 2012, Vol. 33 ›› Issue (3): 543-549.DOI: 10.3724/SP.J.1088.2012.10750

• 研究论文 • 上一篇    下一篇

Mo 对非晶态合金 Ni-B/薄水铝石催化剂上噻吩加氢脱硫性能的影响

亓雪, 石秋杰, 谌伟庆, 张荣斌*   

  1. 南昌大学应用化学研究所, 江西南昌 330031
  • 收稿日期:2011-09-30 修回日期:2011-11-11 出版日期:2012-03-15 发布日期:2015-07-27

Effect of Mo on Performance of Ni-B/Boehmite Amorphous Alloy Catalyst for Thiophene Hydrodesulfurization

QI Xue, SHI Qiujie, CHEN Weiqing, ZHANG Rongbin*   

  1. Institute of Applied Chemistry, Nanchang University, Nanchang 330031, Jiangxi, China
  • Received:2011-09-30 Revised:2011-11-11 Online:2012-03-15 Published:2015-07-27

摘要: 采用浸渍-化学还原法制备了一系列不同 Mo 含量的 Ni-Mo-B/薄水铝石非晶态合金催化剂样品. 以噻吩加氢脱硫为探针反应, 考察了样品的催化性能, 并采用 X 射线衍射、差示扫描量热法、电感耦合等离子体发射光谱、程序升温还原、程序升温脱附、X 射线光电子能谱和透射电镜等技术对样品进行了表征. 结果表明, Mo 的添加促进了 Ni 活性物种的分散, 提高了催化剂的热稳定性, 降低了催化剂的还原温度; 同时, 催化剂的吸氢强度减弱, 酸性增强, 从而显著提高了催化剂活性. 当催化剂中 Mo/Ni 质量比为 12% 时活性最高, 于 220 oC 反应时, 噻吩转化率达到 73.9%.

关键词: 非晶态合金, 钼, 镍, 硼, 薄水铝石, 噻吩, 加氢脱硫

Abstract: A series of Ni-Mo-B/boehmite amorphous alloy catalyst samples with different Mo contents were prepared by the impregnation-chemical reduction method. Thiophene hydrodesulfurization (HDS) was chosen as a probe reaction to investigate the influence of Mo contents on HDS activity of the Ni-Mo-B/boehmite catalyst. The catalyst samples were characterized by X-ray diffraction, differential scanning calorimetry, inductive coupled plasma, temperature-programmed reduction, temperature-programmed desorption, X-ray photoelectron spectroscopy, and transmission electron microscopy. The addition of Mo increased the dispersion of Ni active species, improved the thermal stability of Ni-B/boehmite, decreased the reduction temperature, weakened the strength of Ni_H bonds, increased adsorption centers and acidity, and therefore promoted catalyst activity dramatically. At low temperature of 220 oC, when the Mo/Ni mass ratio is 12%, the conversion of thiophene is the highest, up to 73.9%.

Key words: amorphous alloy, molybdenum, nickel, boron, boehmite, thiophene, hydrodesulfurization