P的添加对柴油超深度加氢脱硫浆状催化剂性能的影响

发布时间：2018-02-15 06:25

  本文关键词： HDS P改性 柴油 完全液相法 浆状催化剂　出处：《石油学报(石油加工)》2017年03期 　论文类型：期刊论文

【摘要】：采用完全液相法制备了以TiO_2-AlOOH为载体,Ni、Mo、W为活性组分的加氢脱硫(HDS)浆状催化剂,主要考察了P助剂的添加对催化剂结构与性能的影响。并利用XRD、BET、NH3-TPD、XPS等技术对催化剂进行表征。结果表明,完全液相法制备的催化剂具有较大的比表面积及孔径、孔容;且在添加P后,催化剂比表面积及孔径、孔容均有较大幅度的增加。柴油的脱硫性能评价结果表明,当助剂P的添加质量分数为1%时,催化剂具有最佳的脱硫活性,可将柴油的硫质量分数降到10μg/g以下,脱硫率高达97.9%。分析表明,P与载体AlOOH作用,产生了AlPO4结构相,从而使催化剂表面的酸量增加;助剂P的添加,显著降低了催化剂活性相与载体的结合能,使得载体与活性相的相互作用降低,有助于活性相硫化程度的提高,进而有助于HDS效果的提升。
[Abstract]:A hydrodesulfurization (HDS) slurry catalyst with TiO_2-AlOOH as the carrier and NiMoMoHW as the active component was prepared by the complete liquid phase method. The effect of the addition of P promoter on the structure and performance of the catalyst was investigated. The catalyst was characterized by XRDX BETH NH 3-TPD XPS. The results showed that the catalyst prepared by the complete liquid phase method had a large specific surface area, pore size and pore volume. After adding P, the specific surface area, pore size and pore volume of the catalyst increased greatly. The results of desulfurization performance evaluation of diesel oil showed that the catalyst had the best desulfurization activity when the mass fraction of additive P was 1. The sulfur content of diesel oil can be reduced to less than 10 渭 g / g, and the desulfurization rate is as high as 97.9%. The analysis shows that the AlPO4 structure phase is produced by the interaction of P with the carrier AlOOH, which increases the acid content on the surface of the catalyst. The binding energy of the active phase of the catalyst and the support was significantly reduced, and the interaction between the support and the active phase was reduced, which was helpful to the improvement of the degree of sulfidation of the active phase and the enhancement of the effect of HDS.
【作者单位】： 太原理工大学煤科学与技术教育部和山西省重点实验室;
【基金】：国家自然科学基金重点项目(21336006) 国家科技支撑计划项目(2013BAC14B04)资助
【分类号】：TE624.9
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本文编号：1512633