Кафедра екології, теплотехніки та охорони праці (ДМетІ)

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ENG: The department of Ecology, Heat-Transfer and labour protection (DMetI)

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The Influence of Initial Parameters on the Process of Synthesis Gases Cooling during Plasma-Chemical Processing of Carbon-Hydrogen Containing Raw Materials
(IOP Publishing Ltd, 2025) Radchenko, Yurii M.; Shevchenko, Volodymyr; Oparin, Serhii; Gupalo, Olena V.; Davydov, Serhii
ENG: The paper investigates the influence of the productivity of plasma-chemical processing of carbon-hydrogen containing raw material and initial parameters of syngas on the performance of syngas cooler. The syngas cooler consists of a sequentially located radiation section, a preliminary convective section, a steam superheater, a main convective section, an economizer, and an autonomous water cooler. To determine the operating parameters of the syngas cooler, a well-known methodology based on the solution of heat transfer and heat balance equations was used. The main performance indicators of the basic cooler design (steam capacity, superheated steam temperature, heat utilization coefficient of syngas) were determined for the ranges of 100 - 400 m3/h and initial temperature of syngas 2000 °C. The research results were summarized in the form of analytical dependence of the total area of heat-exchange surface of the cooler on the flow rate of syngas in the range from 100 to 400 m3/h, which can be used in optimization of equipment for plasma-chemical technology of hydrogen production at minimum of total costs.
Technological Aspects of Purification and Separation of Hydrogen-Containing Gases Obtained by Gasification of Solid Carbon-Containing Media
(M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine, Dnipro, 2025) Shevchenko, Volodymyr; Oparin, Serhii; Davydov, Serhii; Gupalo, Olena V.
ENG: Іn this paper, the subject of study is the processes of purification and separation of hydrogen-containing gases obtained by plasma-chemical gasification of solid carbon-containing media. The work aims to establish the regularities of the influence of technological parameters of hydrogen-containing gases obtained by the gasification of solid carbon-containing media on the specific surfaces of filter partitions, membranes, and adsorbents used for their purification and separation. The graph-analytical research method is used in this work, which consists in finding rational specific surfaces of the processes of purification and separation of hydrogen-containing gases based on the obtained graphical dependencies. Analytical dependencies for calculating the specific surface areas of the filter partition, the membrane, and the adsorbent were established. These dependencies take into account the technological parameters of hydrogen-containing gases and the technological parameters of their separation to produce high-purity hydrogen. Based on the theoretical calculation results, a graphical dependence of the specific surface area of the filter partition on the temperature of hydrogen-containing gases formed during the gasification of solid carbon-containing media and the concentration of solid particles in the gas was obtained. This dependence shows that an increase in the concentration of solid particles and an increase in the temperature of hydrogen-containing gases lead to an increase in the specific surface area of the filter partition. The graphical dependence of the specific surface area of the polyimide membrane on the operating pressure and hydrogen concentration in the permeate and the graphical dependence of the specific surface area of zeolite 13X on the initial hydrogen concentration in the initial gas mixture from 60% to 90% at a final concentration of 99.99% are presented. The paper presents a schematic diagram of purification and separation of hydrogen-containing gases to produce high-purity hydrogen. According to the diagram, the hydrogen-containing gas obtained by the gasification of carbon-containing media is sent for purification from solid particles to a filtration system, from where it is supplied to membrane separation for concentration, and the concentrated hydrogen-containing gas is sent to adsorption separation, where it is separated to produce high-purity hydrogen.