A universal mathematical model is derived for a reforming process in a series of three reactors with an intermediate preheated mix. Results are presented for the modeling of reforming processes with a radial axial input of components of the reaction mix; this makes it possible to select the volume of catalyst and inlet temperature, which will ensure a product of the required quality with the reformer operating at a given output.Development and improvement of the oil-refining branch of industry is closely associated with deepening of the oil-refining process and an increase in the fraction of high-octane gasolines and aromatic hydrocarbons. One of the most critical processes in petrochemistry and oil refining is catalytic reforming, which is intended to increase the octane number of gasolines and to produce individual aerobatic hydrocarbons -benzene, toluol, and xylylol [1].Oil refineries are converting to new catalysts, which function under lower pressures and increasing depth and selectivity of transformations [2,3]. This conversion is preferable for reforming reactors with radial input of reagents, which require lower electric-power outlays for the process than reactors with an axial input.The need exists to develop a universal mathematical model permitting optimal control of the reforming process in various types of reactors and make it possible to analyze processes for a certain composition of reaction mix, output, and type of catalyst. The inclusion of a model of the reformer in the control circuit will ensure improved economic efficiency of the process.Using the transformation scheme for grouped components of a reaction mix [2], which contains the reactions for the formation of aerobatic hydrocarbons from paraffins and cycloparaffins, and the hydrocracking and isomerization reactions, and also utilizing a model of an ideal-substitution reactor with an adiabatic operating regime, a universal mathematical model was obtained for the reforming process in a series of three reactors with an intermediate preheated mix: AlCHex 6 ↔ Ar 6 + 3H 2 ; NPar 6 ↔ IzPar 6 ; AlCPent 6 ↔ AlCHex 6 ; AlCPent 6 + H 2 ↔ IzPar 6 ; NPar 6 + 5H 2 → 6CH 4 ; NPar 6 ↔ Ar 7 + 3H 2 ;

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The article presents analytical results on the use and distribution of energy in reverberatory furnaces with medium pressure gas burners to melt nickel-containing raw materials, by means of a numerical simulation of the furnace’s combustion space. The combustion flow and radiation of a reverberatory furnace powered by natural gas have been calculated and validated. The chemical composition of natural gas makes it the cleanest of fossil fuels, for this reason its use increases worldwide. The higher hydrogen/carbon ratio in its composition, compared to other fossil fuels, causes combustion to emit less CO2 per unit of energy produced. The flue gas outlet duct and medium pressure burners are represented and located as in a typical design to determine the effect on the efficiency of the reverberatory furnace. The results show the temperature field, the mass fraction of oxygen and fuel within the furnace’s combustion space and the comparison between the theoretical and practical efficiency of a furnace.

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