Theoretical Foundations of Chemical Engineering最新文献_第4页

Using Non-Equilibrium Mesoscopic Thermodynamics to Describe the Molecular Mass Distribution of Polymers 用非平衡介观热力学描述聚合物的分子质量分布

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525600780

S. E. Zakiev, S. A. Kurochkin, E. S. Sorin, E. O. Perepelitsina, Yu. P. Kvurt, G. I. Dzhardimalieva

引用次数: 0

Steam Reforming Natural Gas in a Membrane Reactor with a Nickel Catalyst at High Temperatures 高温镍催化剂膜反应器中天然气蒸汽重整

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525600901

V. N. Babak, L. P. Didenko, L. A. Sementsova, Yu. P. Kvurt

{"title":"Steam Reforming Natural Gas in a Membrane Reactor with a Nickel Catalyst at High Temperatures","authors":"V. N. Babak, L. P. Didenko, L. A. Sementsova, Yu. P. Kvurt","doi":"10.1134/S0040579525600901","DOIUrl":"10.1134/S0040579525600901","url":null,"abstract":"The steam conversion of various hydrocarbon mixtures, including natural and associated petroleum gases (APGs), has been modeled in a membrane module (MM) with an industrial nickel catalyst and palladium alloy foil in order to obtain pure hydrogen. The working part of the module consists of two cylindrical chambers separated by a membrane partition. The upper chamber is evacuated, while the lower chamber is maintained at atmospheric pressure. With a uniform feed of raw materials along the outer perimeter of the lower chamber, the problem is reduced to finding the flows of water vapor, carbon oxides, hydrogen, and methane and its homologues from the solution of a system of nonlinear ordinary differential equations of the first order. A wide temperature range of 600 K is considered ( < T < )1000 K at permissible values of the ratio of water vapor to hydrocarbon mixture flows at the inlet. At a fixed temperature, feedstock flows at the input are found at which the hydrogen yield and hydrocarbon conversion reaches 100%, while the maximum hydrogen flow through the membrane is achieved at the minimum permissible ratios of input flows of water vapor and hydrocarbons for a given mixture. A comparison of calculations with experimental data is carried out for a number of hydrocarbon mixtures at different temperatures and determining parameters.","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 6","pages":"1839 - 1864"},"PeriodicalIF":0.7,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Erosive Ultrasonic Cleaning of Cathode Material of a Spent NMC Lithium-Ion Batteries 废NMC锂离子电池正极材料的超声腐蚀清洗

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525600718

O. M. Gradov, I. V. Zinov’eva, Yu. A. Zakhodyaeva, A. A. Voshkin

引用次数: 0

Heat and Mass Transfer when Heating and Drying a Spherical Body in Continuously Acting HF and Microwave Electromagnetic Fields 在连续作用的高频和微波电磁场中加热和干燥球形物体时的传热和传质

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525600809

S. P. Rudobashta, E. M. Kartashov, G. A. Zueva

{"title":"Heat and Mass Transfer when Heating and Drying a Spherical Body in Continuously Acting HF and Microwave Electromagnetic Fields","authors":"S. P. Rudobashta, E. M. Kartashov, G. A. Zueva","doi":"10.1134/S0040579525600809","DOIUrl":"10.1134/S0040579525600809","url":null,"abstract":"A study is performed of heat and mass transfer in a spherical body when it is dried in continuously acting HF and microwave electromagnetic fields. A linear (with constant process parameters) problem of heating a spherical body with these types of energy is formulated and solved analytically under conditions of its convective drying with allowance for the convective exchange of heat and mass with the ambient gas environment, both in general and during the first period of drying. In the first case, the intensity of drying is specified as a function of time and expressed using an analytical solution to the problem of mass conductivity (moisture diffusion) under the condition that moisture evaporates near the surface of the body. In the second case, it is assumed that all the heat supplied to the body is spent on evaporating the moisture, and there is thus no heating of the body. The partial vapor pressure near the surface of the sphere is then equal to that of the saturated vapor at the temperature of the sphere’s surface, and the temperature dependence of the saturated vapor pressure is described by Antoine’s equation. Solutions to problems of heating are obtained for the local temperature and the average temperature over the volume of the sphere. The solutions are used to model processes of heat and mass transfer numerically under conditions of convection and a supply of electromagnetic energy. A numerical analysis is performed for the evaporation moisture from the surface of a spherical particle for a process with a constant intensity of drying. The findings allow calculations of the heating of spherical bodies with a supply of electromagnetic energy and convection.","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 5","pages":"1718 - 1726"},"PeriodicalIF":0.7,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling of Production Processes of Polyvinyl Chloride and Caustic Soda, Chlorine, and Hydrogen by Electrolytic Method 电解法制备聚氯乙烯和烧碱、氯、氢生产过程的建模

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525600998

V. P. Meshalkin, E. A. Shulaeva, Yu. F. Kovalenko, N. S. Shulaev

{"title":"Modeling of Production Processes of Polyvinyl Chloride and Caustic Soda, Chlorine, and Hydrogen by Electrolytic Method","authors":"V. P. Meshalkin, E. A. Shulaeva, Yu. F. Kovalenko, N. S. Shulaev","doi":"10.1134/S0040579525600998","DOIUrl":"10.1134/S0040579525600998","url":null,"abstract":"The presented work describes original computer training complexes that differ from the known digital twins of chemical-engineering systems developed in software packages of such modeling environments as Aspen Plus, Visual Modeler, Unisim Design, HYSYS, ChemCad, etc., in the fact that mathematical models were developed for specific processes based on fundamental laws and empirical relationships. The proposed complexes can be used to determine methods for intensifying chemical-technological processes, using knowledge of the parameters of technological environments at the “micro level,” obtained through modeling. A digital twin of the vinyl chloride polymerization process is described, which allows determining the molecular weight distribution of polymer molecules, taking into account the temperature distribution of polymer–monomer particles. The digital twin of the vinyl chloride polymerization process allows determining the physical and chemical properties of polyvinyl chloride during the polymerization process, and will facilitate the analysis of the technological process modes and predict changes in the parameters when emergency situations arise, which will increase the level of problem-free operation. A description is given of a digital twin that simulates the parameters of an electrolyzer in the production of caustic soda, chlorine, and hydrogen, based on the mathematical dependence of the volt–ampere characteristic on the process temperature. The use of a digital twin of the electrolysis process for the production of caustic soda, chlorine, and hydrogen makes it possible to model the process parameters of the electrolyzer, which allows establishing the optimal modes for conducting technological processes and predicting changes in the parameters when emergency situations arise.","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 6","pages":"1936 - 1944"},"PeriodicalIF":0.7,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanochemical Processing Technology of Natural Materials for Plugging Oil Wells in Remedial and Isolation Operations 修复隔离井封堵天然材料的机械化学加工技术

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525600871

V. P. Meshalkin, A. A. Politov, L. E. Lenchenkova, R. N. Yakubov, A. V. Fakhreeva, E. I. Gusarova, A. G. Telin

{"title":"Mechanochemical Processing Technology of Natural Materials for Plugging Oil Wells in Remedial and Isolation Operations","authors":"V. P. Meshalkin, A. A. Politov, L. E. Lenchenkova, R. N. Yakubov, A. V. Fakhreeva, E. I. Gusarova, A. G. Telin","doi":"10.1134/S0040579525600871","DOIUrl":"10.1134/S0040579525600871","url":null,"abstract":"The article discusses the use of novel mechanochemical and mechanoenzymatic technologies for the production of hybrid organic–inorganic materials for the oil industry. The physical phenomena underlying mechanochemical technologies, which determine physicochemical processes in solids and suspensions during their treatment in specialized mechanochemical and hydromechanical reactors, are examined in detail. Natural minerals, plant-based and bio-renewable raw materials, as well as chemical industry and agricultural waste, are used as feedstock for the production of well-cementing materials. Compounding synthetic polymer-based hydrogels with mechanoactivated dispersions enables the development of well-cementing materials with unique properties. The new hybrid hydrogels exhibit both viscoplastic and viscoelastic properties over a wide range of values and are used for well repair operations in oil production. Mechanochemical technologies are environmentally safe and waste-free, while mechanoenzymatic technologies can be regarded as an example of nature-inspired technologies.","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 6","pages":"1810 - 1818"},"PeriodicalIF":0.7,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Developing a Two-Phase Bubble Mathematical Model of the Oxidative Regeneration of a Cracking Catalyst 建立裂化催化剂氧化再生的两相气泡数学模型

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525600755

G. Yu. Nazarova, E. N. Ivashkina, A. V. Antonov, I. A. Samsonov

引用次数: 0

Comparative Analysis of Extractive Distillation Systems with Different Phase States of Side Withdrawal from an Extractive Distillation Column 萃取蒸馏塔侧抽不同相态的萃取蒸馏系统比较分析

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525600974

E. A. Anokhina, D. A. Ramochnikov, A. V. Timoshenko

{"title":"Comparative Analysis of Extractive Distillation Systems with Different Phase States of Side Withdrawal from an Extractive Distillation Column","authors":"E. A. Anokhina, D. A. Ramochnikov, A. V. Timoshenko","doi":"10.1134/S0040579525600974","DOIUrl":"10.1134/S0040579525600974","url":null,"abstract":"The effect of the aggregate state of side withdrawal on the energy consumption of extractive distillation (ED) systems including a side-stream ED column has been studied by the examples of separation of three binary mixtures: acetone–chloroform, acetone–methanol, and benzene–cyclohexane. For each mixture, the optimal parameters in terms of the total energy consumption in column reboilers have been determined for four systems: a conventional double-column system, a system with partially coupled heat and material flows, a system including a side-stream ED column with side withdrawal in the vapor phase, and a system including a side-stream ED column with side withdrawal in the liquid phase. It has been found that the energy consumption in column reboilers of the system with partially coupled heat and material flows and the system including a side-stream ED column is almost the same and lower than in column reboilers of the conventional double-column system. However, the number of theoretical trays (TTs) in the systems with a side-stream ED column is greater than in the systems with partially coupled heat and material flows. It has been found that the aggregate state of side withdrawal barely affects the total energy consumption in column boilers of the systems with a side-stream ED column.","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 6","pages":"1916 - 1928"},"PeriodicalIF":0.7,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of the Separation Processes of Rare-Earth Elements in the Cascade of Mixing and Settle Extractors by Liquid–Liquid Chromatography Methods 用液-液色谱法分析混合沉淀萃取梯级中稀土元素的分离过程

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S004057952560086X

A. E. Kostanyan, D. V. Lobovich, A. A. Voshkin

引用次数: 0

Rapid Neutralization of Acetone Vapors with a Nanodispersed Aerosol of Titanium Dioxide 纳米二氧化钛气溶胶快速中和丙酮蒸汽

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525601177

O. B. Kudryashova, O. I. Gaenko, S. S. Titov, S. D. Sokolov

{"title":"Rapid Neutralization of Acetone Vapors with a Nanodispersed Aerosol of Titanium Dioxide","authors":"O. B. Kudryashova, O. I. Gaenko, S. S. Titov, S. D. Sokolov","doi":"10.1134/S0040579525601177","DOIUrl":"10.1134/S0040579525601177","url":null,"abstract":"A specially dispersed aerosol adsorbent can be used for the rapid removal of hazardous gas emissions from the air. The ability to perform photocatalytic oxidation under ambient conditions further enhances the efficiency of this method for neutralizing hazardous chemicals. Titanium oxide (TiO2) is a well-known material with both photocatalytic and adsorption properties, and higher particle dispersion and specific surface area increase its effectiveness. This study experimentally examines the rapid removal of acetone vapors, used as a model for hazardous air contamination, using an aerosol of TiO2 nanopowder and TiO2 with the addition of silver particles of various morphologies under ultraviolet (UV) illumination. The initial acetone vapor concentration in the test chamber was approximately 280 ppm. The powder was dispersed in the chamber using a pulse generator at a pressure of 8 atm. UV illumination was provided by an LED lamp with a wavelength of 390 nm. Acetone vapor concentration was measured with an InfraLUM FT-801 Fourier spectrometer, while particle dispersion and concentration were assessed using the LID-2M device, based on small-angle laser scattering. The results show that dispersed TiO2 powders effectively reduce acetone vapor concentrations by up to 44%, even without UV illumination, where aerosol particles act as adsorbents. The most significant photocatalytic effect under UV illumination was observed for TiO2–Ag–SiO2 aerosols with spherical particles. The key advantage of pulse powder dispersion is its high aerosol generation speed (fractions of a second) and increased dispersion due to the breakup of particle agglomerates under impact, which increases the surface area available for adsorption and chemical reactions. These findings contribute to the development and optimization of aerosol-based methods for neutralizing hazardous gas emissions.","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 5","pages":"1771 - 1775"},"PeriodicalIF":0.7,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0