Synthesis of hierarchically porous L-KIT-6 silica–alumina material and the super catalytic performances for hydrodesulfurization of benzothiophene

Post Synthesis of Aluminum Modified Mesoporous TUD-1 Materials and Their Application for FCC Diesel Hydrodesulfurization Catalysts

“…According to FT-IR results (in Table 3), the material PAT-3 has the highest total number of weak sites (79.3 µmol g −1 ), medium and strong sites (38.6 µmol g −1 ); moreover, the highest number of B acid sites. The presence of L acid sites facilitates the hydrogenation reaction; in the meantime, B acid sites favor C-S and C-C bond cleavage [2], which are very important for the hydrodesulfurization reaction. Moreover, acidity accelerates the dealkylation and isomerization reactions, transforming the refractory sulfur reactants into more reactive components and consequently improving the HDS efficiency [54].…”

“…Alternative methods include improving the acidity and pore structure of the supports by introducing acidic porous materials into the catalyst system. Furthermore, the synergistic effects of B and L acid sites are essential to HDS, hydroisomerization and hydrodearomatization reactions [2,3]. Thus, the development and synthesis of novel acidic catalytic materials with low cost will be an important aspect of realizing the production of ultra-clean diesel.…”

“…The main purpose of HDS is to transform poor-quality diesel into an ultraclean final product, while the keypoint is the novel HDS catalyst. However, traditional Al 2 O 3 support used in commercial hydrotreating catalysts cannot completely achieve ultra-deep HDS due to its single L acid site, amorphous pore structures, and strong metal-support interaction (MSI) over alumina support [2,3]. Alternative methods include improving the acidity and pore structure of the supports by introducing acidic porous materials into the catalyst system.…”

Synthesis and application of different phthalocyanine molecular sieve catalyst for oxidative desulfurization

“…Jabbarnezhad et al [12] reported that the sonochemical synthesis of NiMo/Al 2 O 3 -ZrO 2 nanocatalyst in hydrodesulfurization reaction. Duan et al [13] synthesized the porous L-KIT-6 silica-alumina material for hydrodesulfurization of benzothiophene. Razavian et al [14] reported that the synthesis and application of ZSM-5/SAPO-34 and SAPO-34/ZSM-5 composite systems for propylene yield enhancement.…”

Synthesis of ZSM-5/KIT-6 with a tunable pore structure and its catalytic application in the hydrodesulfurization of dibenzothiophene and diesel oil

“…Different varieties of these kinds of materials have been used as supports to prepare HDS catalysts, including MFI/MCM-41, 25 Beta-KIT-6 (BK), 26 and L-KIT-6 (LK). 27 Osterholm et al prepared the micro-mesoporous composite material MFI/MCM-41 by a nano-assembly method. 28 The results showed that with increasing the Al content in the composite, the total acid and B acid were increased at the same time, and the degree the mesostructure was retained was higher than that of pure MCM-41 when the composite material was calcined at 1173 K, which indicated that the introduction of micropores into the mesoporous composite improved the stability of the material.…”