Hierarchically porous TS-1 (HTS-1) zeolite with nanocrystal aggregate structure has been successfully synthesized by hydrothermal and steam-assisted crystallization (SAC) method with the aid of polyvinyl alcohol (PVA). It has been found that the formation of mesoporous aggregates was attributed to the construction of PVA three-dimensional network. The mesoporous aggregate structure could be well maintained by SAC method, resulting in HTS-1 with either surface titanium enrichment or highly interconnected mesopores and high external surface. Both could contribute to the excellent catalytic performance of HTS-1 in oxidative desulfurization of dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT). The TOF numbers of HTS-1 reached a very high value to 114.9 h⁻¹ and 53.2 h⁻¹ in the oxidation of DBT and 4,6-DMDBT, respectively. Moreover, the HTS-1 showed good stability and remained ∼90% of its initial activity even after 3 times cycle. The high catalytic activity and good stability suggest that HTS-1 is a promising catalyst for deep oxidative desulfurization.

借助聚乙烯醇（PVA），通过水热和蒸汽辅助结晶（SAC）方法成功地合成了具有纳米晶体聚集体结构的多层多孔TS-1（HTS-1）沸石。已经发现，介孔聚集体的形成归因于PVA三维网络的构建。通过SAC方法可以很好地保持介孔聚集体结构，从而导致HTS-1具有表面钛富集或高度互连的介孔和高外表面。两者均可有助于HTS-1在二苯并噻吩（DBT）和4,6-二甲基二苯并噻吩（4,6-DMDBT）的氧化脱硫中的出色催化性能。HTS-1的TOF值达到非常高的值，分别为114.9 h ^-1和53.2 h ^-1在DBT和4,6-DMDBT的氧化中分别 此外，HTS-1表现出良好的稳定性，即使在3次循环后仍保持约90％的初始活性。高催化活性和良好的稳定性表明，HTS-1是用于深度氧化脱硫的有前途的催化剂。