水溶性Mo催化剂在悬浮床加氢过程中的低温硫化
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摘要: 采用不同的分散及硫化过程，研究了水溶性分散型Mo催化剂在低温（≤300℃）下的预硫化，并对不同条件下形成的硫化态催化剂进行了表征与评价。结果表明，水溶性Mo催化剂（分散破乳）SⅠ方案采取300℃硫化,（共同破乳）SⅡ采用200℃硫化，硫化后催化剂取得较小的粒径分布；催化剂在100℃下硫化可以形成少量MoS2晶体，并且结晶程度低，300℃硫化时两种硫化方案均形成结晶较好的MoS2物种。水溶性Mo催化剂300℃硫化下随着硫化时间的延长，催化剂的抑焦活性增强,但硫化时间大于2h后催化剂抑焦活性趋于稳定，抑焦活性随硫化时间延长的变化趋于平缓。Abstract: The watersoluble molybdenum catalyst dispersed in oil by using two different methods of dispersion and sulfuration, which was separated and characterized. It shows that the average particle size of the molybdenum crystal is smaller while the emulsion breaking and sulfurizing at 300℃ or at 200℃. The watersolubility molybdenum turns into MoS2 while sulfurizing at 100℃. By using two different methods of dispersion a lower degree of crystallinity is obtained, but the degree of crystallinity increases obviously while sulfurizing at 300℃. The results also show that the coke restraining ability of the catalyst increases when the sulfuration time is prolonged. While the sulfuration time is beyond 2 hours, the coke restraining ability of the catalyst will go steadily with time.
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Key words:
- water solubility /
- Mo /
- suspending bed /
- sulfuration
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