This work is devoted to the problem of trace oxygen removal from hydrocarbon gas streams using Ni-containing sorbents, synthesized by impregnation of γ-Al2O3. During the study three main material parameters were varied: active component content (4-8 wt. %), the nature of the used γ-Al2O3 (formed in CH3COOH and NH3 mediums), as well as the nickel salt, used during impregnation (nickel nitrate and nickel-ammonium complex). The prepared sorbents were characterized by thermogravimentric analysis (TGA), transmission electron microscopy (TEM) and pulse chemisorption of CO and O2. The results showed that the surface nickel particles were of a small size (2-3 nm), and that the highest oxygen capacity is achieved while using nickel nitrate and the carrier, formed in acetic acid. A technological scheme for a large-scale oxygen capturing process was also proposed.

This paper presents the results of the study of trimerization of ethylene to hexene-1 on chromium-pyrrole catalytic system in both semi-periodic and continuous processes under different reaction conditions. The influence of catalyst concentration, temperature and ethylene pressure on the kinetic profiles of have been studied. A comprehensive scheme describing the formation of all observed reaction products has been proposed. It has been concluded that all observed experimental results cannot be described within the framework of one, single kinetic model. This is due to the multistage nature of the process and the need of experimentally determination of the dependences of each stage on reaction parameters, including the stages of formation of catalytic intermediates, initiation, side reactions involving components of the catalytic system, and tri-, oligo-, and polymerization reactions.

The influence of the reaction mixture composition on the catalytic properties of the Mo₁V_0.24Sb_0.23Nb_0.08Ce_0.01O_x/50 wt.% SiO₂ catalyst in the reaction of oxidative dehydrogenation of ethane into ethylene at a temperature of 400-440 °C was investigated. It has been shown that at a high concentration of ethane in the reaction mixture C₂H₆:O₂ = 74:26 (% vol.) and C₂H₆:O₂ = 80:20 (% vol.), the productivity of the process for ethylene is 153-157 g_C2H6/(kg_cat. h). The catalyst stable work in highly concentrated reaction mixtures at 400–420 °C. This allows the process of oxidative dehydrogenation of ethane to be carried out with recycling of the reaction mixture at an ethane conversion of 20–30%.

Supported 10%Ni/LaCeY(n)O_x catalyst with different Y content (n = 0.5–10.0 mol.%) are studied in the present work. Ternary oxide supports are synthesized using citrate method. Structure and phase composition of supports and catalysts are characterized by different physical-chemical methods. Formation of active surface depending on yttrium introduction route is studied. Variation of yttrium content allows determining the optimal dopant content (0.5–1.0 mol.% Y) that sustains activity and stability of catalysts in DRM. The most stable Ni/LaCeY(1)O_x catalyst shows a decrease of the CH₄ and CO₂ conversions from initial values by 7.05 % and 4.52 %, respectively. Multi-walled carbon nanotubes with open edge Ni particles are dominant carbon species in spent Ni/LaCeY(1)O_x catalyst.

The possibility of using hydrodynamic cavitation to intensify the synthesis of solketal from glycerol and acetone in the presence of zeolite has been demonstrated for the first time. The reaction was studied in the presence of faujasite zeolite (FAU, SiO₂ /Al₂O₃ = 14.9). It was found that the use of hydrodynamic cavitation promotes an increase in glycerol conversion from 35.2 to 66.8% in 30 min of reaction without changing the selectivity for solketal at an acetone/glycerol molar ratio of 2.5, a catalyst load of 1.6 wt.% (based on the weight of loaded glycerol) and 25 °C. The results indicate that the cavitation mode can be considered as a promising method for intensifying reactions for obtaining glycerol ketals and acetals.

The possibility of hydroprocessing of plastic waste pyrolysis product to obtain valuable hydrocarbons has been investigated. The catalytic experiment was carried out in the flow regime at T = 310 °C, P_H2 = 80 bar, LHSV = 0.5 h^-1 on a fixed bed of CoMoNi/Al₂O₃ catalyst, a fraction of pyrolysis oil (a mixture of polyethylene and polypropylene) with T_boiling < 360 °C was used as feedstock. As a result of processing, a product with the properties of kerosene, except for boiling point and turbidity, was obtained. The necessity of including acid additives (zeolite or zeolite-like materials) in the catalyst for isomerization and cracking processes was determined.

The formation of Winsor III microemulsion in concentrated H₂SO₄ + C4-C6 alkanes system was detected for the first time with the addition of a quaternary ammonium salt, dimethyl-dioctadecyl-ammonium chloride (C₁₈H₃₇)₂N⁺(CH₃)₂Cl^-, as a surfactant. The effect of this microemulsion formation on the parameters of the sulfuric acid alkylation reaction of isobutane (iB) with 1-butene (1b) and 1-pentene (1p) was studied. The addition of only 0.03 wt. % of surfactant to H₂SO₄ resulted in a sharp change in many process parameters relative to the process using pure H₂SO₄: an increase in isobutane conversion by 1.5-2 times, the yield of C8 products by olefin up to 2 times, and the RON reaching 100 points. Using the NMR method, it was determined that after the alkylation reaction of isobutane with 1-butene in the presence of a microemulsion, the amount of acid-soluble oils (ASO) formed decreases by 15-20 times compared to unmodified acid.

The influence of the diesel fuel hydrotreating temperature on the patterns of silicon sorption on a NiMo/Al₂O₃ grain of a 2.5 mm diameter catalyst has been studied. The tests were carried out on a laboratory set up with a reactor in which the catalyst bed is divided (sectioned) into five parts in height by metal perforated partitions that are permeable to raw materials. This made it possible to obtain silicon concentration profiles along the height of the catalyst layer. decamethylcyclopentasiloxane, whose content was 200 ppm, was used as silicon compounds in the diesel fraction of oil. Three series of experiments with a duration of 200 hours were conducted at temperatures of 315, 340 and 365 ^OC.Astraight-run dieselfractioncontaining the additionof decamethylcyclopentasiloxane as an additionalsource of silicon was usedas a raw material. It was foundthatwithincreasingprocesstemperature, the ability of the catalysttoadsorbsiliconincreases.