Hydrotreating Performance of FCC Diesel and Dibenzothiophene over NiMo Supported Zirconium Modified Al-TUD-1 Catalysts
Hydrotreating Performance of FCC Diesel and Dibenzothiophene over NiMo Supported Zirconium Modified Al-TUD-1 Catalysts
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NiMo 负载锆改性 Al-TUD-1 催化剂上 FCC 柴油和二苯并噻吩的加氢处理性能
DOI：
10.1021/acs.iecr.8b01214
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发表时间：
2018-09-05
影响因子：
4.2
通讯作者：
Chen, Zhentao
中科院分区：
文献类型：
--
作者：
Wang, Bo;Xiao, Chengkun;Chen, Zhentao
采用溶胶-凝胶法成功制备了不同Zr含量的Zr改性介孔氧化铝Al-TUD-1，最佳热处理时间为4 h。HRTEM、XPS和吡啶FTIR的表征结果表明，Zr原子作为电子助剂不仅提高了MoS 2活性相的硫化程度，改变了MoS 2活性相的形貌，而且使Al 2 O3骨架中的酸性增加。此外，分别以二苯并噻吩（DBT）和FCC柴油为原料对硫化催化剂进行了评价。NiMo/ZrAT-100催化剂具有最大的孔径、最高的金属硫化物活性、最高的总酸和B/L值，在柴油加氢处理反应中具有最高的HDS和HDN效率（99.1%和98.7%），并且在DBT HDS反应中具有最大的反应速率常数。此外，还提出了一个可能的反应网络，其中DDS途径是DBT HDS的主要途径。
Zr modified mesoporous alumina Al-TUD-1 with different Zr content was successfully synthesized via sol-gel method and the optimal thermal treatment time was 4 h. The characterization results of HRTEM, XPS and pyridine FTIR revealed that Zr atoms acted as electronic promoters not only enhanced the sulfidation degree and modulated the morphology of MoS2 active phases but' also brought more acidities into the alumina framework. Additionally, the sulfided catalysts were evaluated using dibenzothiophene (DBT) and FCC diesel as feedstocks, respectively. NiMo/ZrAT-100 catalyst with the largest pore size, the highest active metal sulfidities, as well as the highest total acid and B/L value exhibited the highest HDS (99.1%) and HDN efficiencies (98.7%) in diesel hydrotreating reaction; moreover, it possessed the largest reaction rate constant in DBT HDS reaction. Furthermore, a possible reaction network was also proposed, in which DDS route was the predominant pathway for DBT HDS.