Research on the development of a homogeneous process for low-temperature oxidation of carbon monoxide in the presence of a “platinum group metal + vanadium-containing heteropolyacid (HPA)” catalytic system has been presented. The optimal reaction conditions, ensuring the maximum rate of CO oxidation to CO₂, have been determined; for this reaction the kinetic features have been established, and its mechanism has been proposed. It has been shown that homogeneous systems based on Pd^II complex exhibit high activity and productivity, but have low stability and operate only at pH below 1,5. The stability of the catalyst can be increased by simultaneous introduction of σ- and π-donor ligands into the system; however, it is more effective to use the Pt^IV complex in the presence of catalytic amounts of palladium salt at a ratio of 100/1. The transition from HPA solutions with a low content of vanadium atoms (H₇PMo₈V₄O₄₀) to solutions of modified compositions (H₁₀P₃Mo₁₈V₇O₈₄) ensures an increase in the activity and productivity of the system, with the kinetics of CO oxidation being maintained. The combined homogeneous catalyst Pt^IV + Pd^II + H₁₀P₃Mo₁₈V₇O₈₄ remains stable during multi-cycle use without reducing activity, operates without an induction period and can be used at pH range of 1,7–2,0, which simplifies the process equipment.

This work evaluates the possibility of using nickel-containing structured glass fiber catalysts (Ni/GFC) for the process of hydrogenolysis of gas condensate (GC) into transportable components of natural gas, which will increase the efficiency of GC processing and contribute to the development of more cost-effective technologies in the oil-gas industry. Ni/GFC samples with Ni content of 5, 10 and 15% wt. were synthesized by surface thermal synthesis (STS). An industrial granular catalyst with a mass Ni content of 16% was used to compare the catalytic activity of the obtained catalysts. The highest activity and selectivity of methane formation is observed on the 10% Ni/ GFC catalyst, by these parameters it is superior not only to other GFCs, but also the traditional granular catalyst.

The focus on "green" energy requires the search for environmentally friendly energy storage systems. The reason for choosing ammonia as a potential storage for hydrogen is its high energy capacity and the absence of carbon and nitrogen oxide emissions during decomposition. Herein, we tested Co-Al₂O₃/SiO₂ ammonia decomposition catalysts that had been pre-activated via cyclic hydrogenation-carburization-hydrogenation (RCR) and reduction-oxidation-reduction (ROR) procedures versus the conventional cobalt oxides reduction with hydrogen (R). The samples were characterized by H₂-TPR, TEM and synchrotron X-ray diffraction techniques, which revealed that the structural properties of the catalysts were not modified by the reaction. Since the activities of the tested catalysts and the effective reaction barriers appeared to be close, the easiest-to-prepare catalyst R was chosen for the long-term catalytic trial (500 h), and it showed excellent performance stability.

The paper presents the results of a study of Pt and Pd catalysts deposited on porous aluminum oxide in the reaction of hydrogen oxidation reaction for use the process of helium concentrate purification. The properties of the prepared catalysts were compared with the properties of a foreign reference catalyst. In a laboratory reactor using a mixture simulating helium concentrate, we studied the “ignition” and deactivation of catalysts at room temperature, which simulates the conditions at the inlet section of an industrial adiabatic reactor. The properties of catalysts were also studied at temperatures of 200, 250 and 300 °C under conditions simulating the middle part and the outlet of an industrial reactor. The secondary process of hydrogen formation at 250-300 °C was studied, which is explained by methane and ethane steam reforming which present in the model mixture simulating helium concentrate. The results of the work can be used in the development of domestic catalysts for the purification of helium obtained from natural gas.

The kinetics of coke burning off at temperatures of 525–650 °C on a K-CrOx/γ-Al2O3 catalyst for single-stage dehydrogenation of n-butane to butadiene-1,3, similar to the industrial one, was studied. It was shown that under the studied conditions, the coke burning off reaction is described by a first-order kinetic equation with respect to oxygen and coke with an observed activation energy of ~93 kJ/mol. The adequacy of the kinetic model was confirmed by the coincidence of the calculated and experimental results.

Series of Ni-Mo catalysts based on ZSM-23 zeolite were synthesized by incipient wetness impregnation – with a fixed content of Ni (5 wt. %). These catalysts were tested in a hydroprocessing of a mixture of fatty acids (C₁₆-C₁₈) in a flow reactor at a temperature of 300 °C, a pressure of 2.5 MPa and WHSV = 8.4 h^-1. The influence of the ratio of metals on the formation of forms of the active component, as well as on the activity, selectivity to iso-alkanes and the stability of catalysts during the hydroprocessing of a mixture of undiluted fatty acids was determined. The ratio of metals was investigated in the range from 0 to 1. The highest deoxygenation activity and highest isoalkanes yield were found for sample with Mo/(Ni+Mo) ratio equal 0.25, in which, according to the XPS, the Mo/(Ni+Mo) ratio on the surface is 0.4.

The article proposes a method for producing high-octane gasoline from associated petroleum gas (APG), which consists of a combination of the processes of direct aromatization of APG and Fischer-Tropsch synthesis (FT). The APG aromatization process was experimentally studied in a flow-through installation at a pressure of 0,1 MPa and a temperature of 450-600 °C on a ZnO/ZSM-5/Al₂O₃ catalyst. It has been shown that at a temperature of 600 °C the degree of conversion of C₃₊ hydrocarbons is 27,8%, and the yield of aromatic hydrocarbons is 10,9 %. The synthesis of FT was studied on a hybrid Co-Al₂O₃/SiO₂/ZSM-5/Al₂O₃ catalyst at a temperature of 250 °C, pressure 1,0 MPa, GHSV 1000 h^-1. A pilot batch of synthetic gasoline fraction with a volume of 1 liter was produced at a pilot plant, and its main physicochemical and operational properties were analyzed. It has been shown that compounding the gasoline fraction of the FT synthesis and direct aromatization products of APG makes it possible to increase the octane number from 78,5 to 92,8 units, while the density increases from 710 to 778 kg/m³. The proposed technological solutions can be used for processing APG into high-octane synthetic gasoline using GTL modular units.

This research focuses on analyzing how different primary catalysts affect the glycolysis of plastic made from bisphenol A (PC) polycarbonate. It was found that the process of chemical decomposition of PC under the influence of ethylene glycol (EG) leads to the formation of products with high added value: bisphenol A (PC monomer, BPA), BPA, and ethylene carbonate or ethylene glycol co-ethers (BPA monohydroxyethyl ether, MHE-BPA; BPA bishydroxyethyl ether, BHE-BPA). A quantitative assessment of the yields of the reaction products was also carried out. The yield of products at 100% PC conversion was 33% for BPA, 50% for MHE-BPA, and 17% for BHE-BPA. The effectiveness of using various alkalis depending on the type of metal was also compared within the context of this investigation.

Industrial effluents from enterprises using dyes are among the main production wastes polluting the environment and surface waters. In order to solve this problem, much attention has recently been paid to innovative processes for their removal. The review considers research works over the past 10 years on various biological, chemical and physical methods for dye removal and assesses their effectiveness. The possibility of using cellulose and cellulose-based materials for dye removal from aqueous solutions is shown. The main attention is paid to composites based on cellulose and metal-organic frameworks (Cell-MOF). The main approaches to the creation of Cell-MOF materials and the possibility of regulating their properties are considered. Examples of using Cell-MOF materials for removing dyes from aqueous solutions by adsorption and catalytic methods are given. Prospects and problems of their practical use are discussed.