The textural, structural, morphological, and acidic properties of TiO₂/Al-ZSM-12 zeolite synthesized viathe hydrothermal method and using methyltriethylammonium chloride as a template were studied in this study. The structure, size, and shape of the crystallites, and the acidity of the synthesized materials were investigated in detail using the following methods: XRD, low-temperature nitrogen adsorption–desorption, XRF, FTIR, Raman spectroscopy, DRS UV–Vis, DRIFTS, PL, SEM, TEM, solid-state NMR spectroscopy on ²⁷Al, ¹H, ²⁹Si, ¹H-²⁹Si and ²³Na nuclei, NH₃-TPD, TG, DSC, DTA, FTIR-Py, FTIR-2,6-dTBP, FTIR-CD₃CN, and DRIFTS-acid. The presence of tetrahedral titanium in the TiO₂/Al-ZSM-12 zeolite was confirmed by Raman spectroscopy, DRIFT, and ²⁹Si NMR. It was revealed that the crystallites of the TiO₂/Al-ZSM-12 zeolite, elongated along the b axis, had a higher acidity compared to the unsubstituted zeolite Al-ZSM-12. The oxidative catalytic activity of the TiO₂/Al-ZSM-12 zeolite was studied in the photoinduced decomposition of the crystal violet dye and it was found that the reaction proceeds most efficiently in the presence of H₂O₂ as an oxidizing agent and TiO₂/Al-ZSM-12 as a catalyst (PCA = 0.157%∙min⁻¹).

A series of bifunctional catalysts, MoS₂/Al₂O₃ (70 wt.%), zeolite (30 wt.%) (zeolite—ZSM-5, ZSM-12, and ZSM-22), and silica aluminophosphate SAPO-11, were synthesized for hydroconversion of methyl palmitate (10 wt.% in dodecane) in a trickle-bed reactor. Mo loading was about 7 wt.%. Catalysts and supports were characterized by different physical-chemical methods (HRTEM-EDX, SEM-EDX, XRD, N₂ physisorption, and FTIR spectroscopy). Hydroprocessing was performed at a temperature of 250–350 °C, hydrogen pressure of 3.0–5.0 MPa, liquid hourly space velocity (LHSV) of 36 h⁻¹, and an H₂/feed ratio of 600 Nm³/m³. Complete conversion of oxygen-containing compounds was achieved at 310 °C in the presence of MoS₂/Al₂O₃-zeolite catalysts; the selectivity for the conversion of methyl palmitate via the ‘direct’ hydrodeoxygenation (HDO) route was over 85%. The yield of iso-alkanes gradually increases in order: MoS₂/Al₂O₃ < MoS₂/Al₂O₃-ZSM-12 < MoS₂/Al₂O₃-ZSM-5 < MoS₂/Al₂O₃-SAPO-11 < MoS₂/Al₂O₃-ZSM-22. The sample MoS₂/Al₂O₃-ZSM-22 demonstrated the highest yield of iso-alkanes (40%). The hydroisomerization activity of the catalysts was in good correlation with the concentration of Brønsted acid sites in the synthesized supports.

A series of catalysts based on hybrid intergrowth structure zeolites MFI-MEL, MFI-MTW, and MFI-MCM-41 are studied in the reaction of olefins synthesis from dimethyl ether at atmospheric pressure and a temperature of 340 °C. The total acidity of hybrid zeolite-based catalysts is shown to correlate with their activity. However, the use of zeolite with the structure MFI-MCM-41, which is characterized by a high content of medium acid sites, additionally catalyzes the methanol dehydration reaction, resulting in a decrease in the observed DME conversion. The obtained product distributions are brought into correlation with the texture of catalysts. It is shown that the use of hybrid zeolites does not change the mechanism of reaction, but the structural features of zeolites influence the priority of the competing MTO reactions: high ethylene yield is observed for catalysts with high micropore volume. The topology of the hybrid zeolite has been shown to influence the hydrogen transfer reaction rate, but not to change the isomerizing activity of the catalyst.

The properties of ZSM-12 zeolites (SiO₂/Al₂O₃ = 70) synthesized under hydrothermal conditions have been studied. The prepared samples were examined by X-ray phase analysis, low-temperature nitrogen adsorption–desorption, scanning electron microscopy, solid-state ²⁷Al NMR spectroscopy, infrared spectroscopy, NH₃ thermally programmed desorption, infrared spectroscopy of adsorbed pyridine, and X-ray fluorescence spectroscopy and investigated in the toluene disproportionation reaction under the following conditions: Т = 300–480°С, mass feedstock flow rate 1.5, 3, and 6 h^–1, Р(Н₂) = 10 atm. It was found that a ZSM-12 zeolite sample synthesized using monoethanol-N,N-dimethyl-N-ethylammonium bromide as a template is the most effective catalyst for the toluene disproportionation. It is shown that the toluene disproportionation occurs with the formation of benzene and a mixture of ortho-, meta-, para-xylenes. The fraction of the latter in the liquid reaction products was up to 50%.

Bio-oils derived from the pyrolysis of lignin-based biomass often contain a variety of oxygenated compounds, which can compromise their usefulness as a fuel. To improve the quality of bio-oil, catalytic hydrodeoxygenation (HDO) is a crucial step that removes oxygen from the oil in the form of water. In this study, we showed that MFI nanosheets are excellent supports for Ru-catalysts. We synthesized highly crystalline MFI nanosheets using a simple hydrothermal seeding procedure; the final material was obtained in 56 h of crystallization. We investigated the activity of Ru supported on different materials. Our findings indicated that Ru supported on hierarchical MFI demonstrated excellent activity in HDO of guaiacol. Our results demonstrated that Ru/ZNS-56 achieved nearly 100% selectivity towards cyclohexane under mild conditions (200 °C, 50 bar H₂, 1 h).