Mathematical modeling of catalytic processes is necessary for the complete and accurate description, as well as for controlling the quality and physicochemical studied of catalysts. In the paper, theoretical issues of industrial catalysis are discussed. The work is devoted to theoretical graph analysis of informativity of kinetic parameters of the model of a complex chemical reaction. The aim is the development and automation of algorithm for determining basis of nonlinear parameter functions in solving inverse problems of chemical kinetics in order to define the number and form of independent combinations of rate constants of elementary stages. A program package for analysis of informativity of kinetic parameters of the mathematical model of a complex catalytic reaction is developed and described. The obtained functional relations between the kinetic parameters can be useful for experimentalists in physicochemical interpretation and analysis of mechanisms of chemical reactions. In other words, the proposed method allows independent combinations of kinetic constants to be distinguished that results in shortening the number of the model parameters and, as a consequence, enhance the accuracy of the mathematical model. The mechanism of hydrogen oxidation over a platinum catalyst is given as an example of the use of the software.

Physicochemical properties of commercial medical CO₂ sorbents Amsorb Plus, Draeger 800, Draeger free, Loflosorb, Sodasorb, Sofnolime, Spherasorb, Ventisorb, as well as of the Russian adsorbent HPI were studied to determine the chemical compositions, textural characteristics, effective protection time with respect to CO₂; crushing and attrition resistance of granular sorbents were measured using the SHELL SMS-1471 and ASTM D 4058 96 procedures. The best performance (a high CO₂ capacitance, strength) was observed with Draeger 800. The obtained data on operating properties of commercial sorbents and recommendations can be useful for medicine, rescue works, as well as for scientific and production activities when cleaning air mixtures from carbon dioxide is necessary.

A possibility of lowering the formation of trans-isomers during hydrogenation of plant oil over a low-loaded palladium catalyst supported on activated diatomite was studied. The comparison to the commercial nickel catalyst led to establish that the activated diatomite is a promising support of the catalyst for hydrogenation of plant oil. Palladium particles of 2–10 nm in size (3–6 nm particles predominated) were shown to be uniformly distributed over the support surface. It was shown experimentally that the Pd catalyst was more active and selective at low temperature than the nickel catalyst to provide two-fold decrease in the concentration of trans-isomers in the hydrogenated fat.

The dependence of the selectivity to products of the commercial process for NO hydrogenation in the H₂SO₄ solution on process parameters such as the flow rate of the NO + H₂ mixture through the reactor, stirring intensity, concentration of the Pt/graphite catalyst in the suspension and temperature was studied. In the process in the mode of external diffusion of the reactant gases, the first or zero order was observed with respect to the catalyst depending on the catalyst concentration in the suspension, the selectivity to the solid products – hydroxylamine sulfates (HAS) and ammonium – being maximal in the transition range. It was shown that the selectivity to HAS increased upon functionalization of the graphite surface with nitrogen-containing groups that led to modifying the adsorbing and catalytic properties of the supported platinum nanoparticles. Specific behavior of platinum catalysts in concentrated suspensions at the limited feeding reactant gases was discussed.

Dichloroanhydrides of isophthalic (isophthaloyl chloride) and terephthalic (terephthaloyl chloride) acids are, undoubtedly, strategically important compounds. Among their main application areas is synthesis of Aramid fibers to be used for manufacturing dual use materials including synthesis of Terlon®, Phenylon®, Armos®, Tegelen®, SVM®, and Rusar® fibers. Specific requirements for quality of the target anhydrides and feedstock determine the choice of the synthetic methods. In the review paper, various methods, including catalytic methods, for the synthesis of iso- and terephthaloyl chlorides based on the use of different types of feedstock are discussed. Main methods for analysis of these compounds are described in detail.

Physicochemical properties of modified MoVTeNbО catalysts are shown to depend strongly on the preparation procedure and the source of bismuth. Addition of a pH-neutral organic bismuth-containing compound at the stage of mixing initial component solutions is accompanied by precipitation and formation of inactive phase but not the necessary phase M1. Irrespectively of the nature of the initial bismuth compound, the introduction of it to the dry MoVTeNb precursor results in destruction of the latter and, as a consequence, in a lower content of phase M1 and the formation of binary V-Mo and Te-Mo oxides. In the reaction of oxidative dehydrogenation of ethane (ODE), the maximal yield of ethylene (76.5 %) is observed with the catalyst obtained by impregnation of calcined MoVTeNb oxide catalyst with a solution of an organobismuth compound. The same catalyst provides the yield of acrylic acid of ca. 48 %. Nevertheless, a more practicable method for preparation of bismuthcontaining catalysts is the addition of bismuth nitrate to the solution of the initial components; such an ODE catalyst provides the maximal yield of ethylene of ca. 76 %.

Oligomerization of pent-1-ene is an effective process for synthesis of high-quality environmentally friendly fuel components. Catalytic properties of H-zeolites FAU, OFF, MOR, ВЕА, MTW and MFI were studied for synthesis of pentene oligomers in an autoclave at 110–200 °C. The wide-pore structure of H-Y and H-Beta (18) zeolites and the high concentration of acid sites were established to cause the high oligomerization activity to obtain 97–100 % yields of oligomers. Oligomers obtained over these catalysts comprised, depending on the reaction conditions, 30–73 % dimers, 25–50 % trimers and 2–14 % oligomers with more than three monomer units (n > 3). Fine-pore zeolites (H-ZSM-5) and zeolites with one-dimensional channel systems (H-OFF, H-MOR, H-ZSM-12) were less active to oligomerization of pent-1-ene, decenes being the main reaction products.

The results of studying physicochemical properties of fresh and industrially used materials of active filtering (MAF) used as protective layers of hydrotreatment catalysts are discussed. Data on functional properties of MAF of various types are obtained.