In this study, new type of boron-substituted Al-ZSM-12 was developed using hydrothermal synthesis technique and methyltriethylammonium chloride as a template; physical and chemical characteristics of B/Al-ZSM-12 were studied in detail. The presence of tetrahedral boron in the isomorphically substituted zeolite was confirmed by FTIR, Raman, DRS UV-Vis, DRIFTS, 29Si and 11B NMR, and ICP-MS methods. Due to the incorporation of boron into Al-ZSM-12 zeolite, the resulting crystallites of B/Al-ZSM-12 have a shorter b-axis length compared to unsubstituted Al-ZSM-12. Moreover, boron atoms do not affect the change in the structure of Al-ZSM-12 zeolite, while being embedded in the framework, affect acidic properties, increasing total acidity and a providing high concentration of Br & Oslash;nsted acid sites compared to Al-ZSM-12. Meanwhile, the surface area increases from 320 m2 g- 1 for Al-ZSM-12 to 350 m2 g- 1 for B/Al-ZSM-12.

The properties of ZSM-12 zeolites (SiO 2 /Al 2 O 3 = 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 27 Al NMR spectroscopy, infrared spectroscopy, NH 3 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 (Н 2 ) = 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%.

This review provides a detailed analysis of existing methods for the synthesis of ZSM-48 zeolites using various inorganic reagents, templates, and seeds under varying process conditions (e.g., temperature and time). In particular, the effects of reagents and synthesis parameters on the resultant physicochemical properties of ZSM-48 are discussed. The paper comparatively assesses the properties of a series of ZSM-48 samples synthesized under different conditions. These properties have been characterized by X-ray diffraction, thermogravimetry, scanning electron microscopy, low-temperature nitrogen adsorption/desorption, IR spectroscopy of adsorbed pyridine, IR spectroscopy of adsorbed ammonia, and other physicochemical methods.

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).

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).

The plasma-assisted process of dry reforming of methane in barrier discharge was studied using new compositions of zeolite-containing catalysts. Catalysts based on Ni, Fe, Co oxides promoted with CeO2 have been synthesize and characterized by low-temperature nitrogen adsorption–desorption, X-ray fluorescence spectroscopy, X-ray diffraction analysis, and temperature-programmed desorption of ammonia. The catalytic activity of the prepared samples on the reaction of the syngas production in gas discharge without additional heating of the reactor was studied. It was found that introduction of a catalyst into the discharge region makes it possible to increase the CH4 conversion from 10 to 16

Zeolite-containing materials of various structural types (MFI, MEL, MTW) wereprepared by the hydrothermal method using organic templates based on quaternarypolymethylenediammonium salts. The materials were characterized by X-raydiffraction analysis, low-temperature nitrogen adsorption–desorption,temperature-programmed ammonia desorption, IR spectroscopy, scanning electronmicroscopy, X-ray fluorescence analysis, transmission electron microscopy,solid-state 27Al NMR spectroscopy, and IRspectroscopy of adsorbed pyridine. The effect of the template on the structureof the material obtained was revealed.

Characteristics of zeolite ZSM-12 crystallization using methyltriethylammonium chloride and N,N -dimethyl- N -ethyl(monoethanol)ammonium bromide as templates have been studied. The materials have been characterized by X-ray diffraction analysis, scanning electron microscopy, X-ray fluorescence analysis, low-temperature nitrogen adsorption–desorption, temperature-programmed desorption of ammonia, and solid-state 27 Al nuclear magnetic resonance spectroscopy. It has been shown that dimethylethylethanolammonium bromide inhibits crystal growth along the a and c planes and thereby contributes to crystal growth only in the direction of the b axis, which, in turn, leads to lower surface area and acidity of the sample than the respective parameters of the zeolite synthesized using methyltriethylammonium chloride.

New class of templates, ethanolamine salts, was used to synthesize zeolites with the ZSM-12 structure. The materials obtained were characterized by methods of powder X-ray diffraction, scanning electron microscopy, IR spectroscopy, low-temperature adsorption–desorption of nitrogen, and elemental analysis. It was shown that, with these templates, it is possible to obtain crystallites with well formed acicular shape, hexagonal morphology, large surface area, and narrow pore size distribution.

The kinetics of adsorption of salicylic acid on Sibunit was studied in an aqueous medium. The order of salicylic acid adsorption and the activation energy of adsorption were studied. The high adsorption capacity of Sibunit for this substance was found.