The study is dedicated to the synthesis and study of the physicochemical properties of a porous catalytic system based on mesoporous mesostructured silicate SBA-15. Aluminosilicate composites with SBA-15 mesostructure were synthesized by the method of co-condensation at a pH ~1.5 and an Al/Si molar ratio ranging from 2.5 to 35%. The obtained aluminosilicates have been characterized using X-ray diffraction, gas adsorption, IR spectroscopy, electron microscopy, and elemental analysis. With an increase in the Al/Si ratio during synthesis, there is a regular decrease in the unit cell parameter from 107.3 to 99.9 Å, specific surface area from 837 to 699 m²/g, and pore volume from 0.86 to 0.62 cm³/g. The incorporation of aluminum into the SBA-15 structure reaches 2.6%. Changes in the composition of the initial mixture significantly affect the morphology of the aluminosilicate particles; in particular, the thickness of the fiber-like particles increases while the length of the fibers remains practically unchanged. The thickened fibers are unstable, and at an Al/Si ratio in the initial composition of 35% mol., the composite particles are noticeably fragmented.

The process of preparing a highly concentrated Ni/Al₂O₃ catalyst by impregnating γ-Al₂O₃ with a nickel nitrate solution followed by calcination in a hydrogen-containing atmosphere was studied. Calcination of the supported Ni₃(OH)₄(NO₃)₂, which is formed during the heat treatment of the impregnated carrier at 200 °C, in an H₂ environment (H₂ content ≥20%) at 230 °C promotes the formation of a phase of highly dispersed NiO. In this case, nitrate ions are completely removed and there is no enlargement of the active component particles compared to the initial Ni₃(ОН)₄(NO₃)₂ phase. A decrease in the H₂ concentration in the gas mixture reduces the rate of nitrate decomposition and leads to an agglomeration of the active component particles at an H₂ content of ≤5%. An assumption is made about the role of hydrogen in the process of calcining the catalyst precursor.

A promising method for preparing powdered zeolite MSM-22 with a degree of crystallinity close to 100% has been developed, which is based on the use of synthetic aluminosilicate as the main source of silicon and aluminum. The patterns of influence of crystallization conditions of synthetic aluminosilicate on the physicochemical characteristics of the resulting product have been established.

The physicochemical properties, the state of the active component, the activity and selectivity of deposited molybdenum-containing catalysts in the processes of ethylene to propylene conversion and propylene metathesis are considered. It is shown that the activity of molybdenum-containing catalysts in the transformations of ethylene and propylene increases with an increase in the number of medium-strength and strong acid centers on their surface. The alumina-based catalyst is active at temperatures of 100-250 °C. At the same time, a silica gel-based catalyst requires temperatures up to 500 °C. The higher activity of the MoO3/γ-Al2O3 catalyst in metathesis reactions is associated with the formation of highly dispersed molybdenum compounds and Brensted acid centers.

In this work, new Pd fiberglass catalysts (FGCs) for the oxidation of volatile organic compounds (VOCs) were synthesized using chemical vapor deposition (CVD) and the traditional incipient wetness impregnation. The FGC samples were characterized by physicochemical methods (SEM, XPS), and the formation of metal particles on the surface of the glass fibers was studied. The process of methane oxidation on the obtained GFCs was investigated, and the specific reaction rates as well as the activation energies for the oxidation of CH4 on the FGCs were determined. A comparative analysis of the catalysts prepared by CVD and impregnation methods was conducted, demonstrating the potential of the CVD method as an effective approach for FGCs synthesis, serving as an alternative to the impregnation method.

Silica aluminas are of interest as an alternative to zeolites in the composition of catalysts for one-pot Fischer–Tropsch synthesis. The aim of the work is to study the possibility of using synthetic and natural silica aluminas in the composition of a cobalt Fischer-Tropsch synthesis catalyst to increase the content of base oil fraction in the products obtained. The influence of the calcination temperature of silica aluminas on the characteristics of the prepared catalysts and the composition of C₅₊ hydrocarbons formed in their presence was investigated. Aluminosilicate powders were studied using X-ray diffraction, TGA, IR spectroscopy and low-temperature nitrogen sorption methods. Catalysts prepared on the basis of silica aluminas were tested in the Fischer–Tropsch synthesis. The obtained results confirm the possibility of one-reactor synthesis of C₅₊ hydrocarbons enriched with base oil fraction: catalyst based on synthetic amorphous silica alumina makes it possible to obtain a product containing up to 37 wt.% of fraction with a boiling range of 300–490°C. The conditions for the selective production of base oil fraction in the presence of such catalysts were optimized: 2,5 MPа, 210°С, 500 h^-1. It has been shown that it is possible to obtain C₅₊ hydrocarbons containing up to 60 wt.% diesel fraction at 1,5 MPa, especially in the presence of pyrophyllite-based catalysts.

This article presents a review of research in the field of acid catalyzed production of cellulose acetates isolated from various types of biomass. Classical methods of acetylation in the presence of strong inorganic acids and the use of transition metal salts, iodine or polyoxometalates are considered. Disadvantages of the traditional methods such as corrosion activity and low environmental friendliness, formation of wastewater that requires disposal are noted. An analysis of the literature allows one to identify promising areas for further research, namely the development of new regenerable catalysts, regulation of the degree of substitution during acetylation when using them. Such systems can make it possible to obtain materials that have potential for the development of separators for energy storage devices, including supercapacitors.

To study the non-oxidative conversion of natural gas into valuable hydrocarbons and hydrogen, a digital reactor model has been developed in which laser radiation affects a two-phase reaction medium of gas and solid catalytic nanoparticles suspended in it. The oncoming flows of this gas-dust medium in the axisymmetric tube of the reactor absorb radiation in the area of their collision. Heat exchange with a wall along the length of a reactor with laser radiation during endothermic methane conversion is investigated. The laser radiation introduced into the medium increases the temperature of the medium locally in the area of the yield of the products obtained and shifts their composition towards aromatic compounds. The temperature of 1173 K of the walls and radiation determined the conversion of 65% methane into hydrocarbons and hydrogen. The prospects of combining traditional and laser methods of energy input into the reaction medium to control the selectivity of non-oxidative methane conversion are shown.