Theoretical Foundations of Chemical Engineering最新文献_第5页

Technology for Producing Isophorone in a Microfluidic Reactor 微流控反应器生产异佛尔酮技术

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525600822

Kh. G. Kuk, M. V. Shishanov, K. A. Dosov, D. V. Yashunin, I. A. Bol’shakov, N. V. Morozov

{"title":"Technology for Producing Isophorone in a Microfluidic Reactor","authors":"Kh. G. Kuk, M. V. Shishanov, K. A. Dosov, D. V. Yashunin, I. A. Bol’shakov, N. V. Morozov","doi":"10.1134/S0040579525600822","DOIUrl":"10.1134/S0040579525600822","url":null,"abstract":"The article is devoted to the study of microfluidic technologies and their application areas. Microfluidic technologies are a promising field that allows achieving increased selectivity of reagents and ensuring a safe and well-intensified process. Reactors of this type are used in special chemistry and for engineering developments. The aim of the work is to develop a flow microfluidic reactor based on the kinetics of isophorone from acetone in an alkaline medium. The Comsol Multiphysics software is used as the environment for numerical modeling and calculation. This program has previously been used for modeling microchips and has specialized modules for such calculations. In this paper, a method is proposed for designing reaction-specific microfluidic chips using computational modeling programs based on kinetic and geometric parameters. As a result of the work, the number of micromixers required for complete mixing of reagents and the length of the channel that ensures the complete reaction are determined. The main geometric parameters of the calculated model are given. A comparison of the calculation results and the obtained experimental data is carried out.","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 5","pages":"1495 - 1503"},"PeriodicalIF":0.7,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676458","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}

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Mathematical Model of a Closed Water-Circulation System of Wastewater from Small-Scale Chemical Production 小型化工废水闭式水循环系统的数学模型

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525601049

Yu. M. Averina, O. V. Zvereva, B. B. Bogomolov

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Two-Level Modeling of Phase-Formation Kinetics in the Synthesis of a Composite from Ti–Al–Fe2O3 Powders in 3D Technology 三维技术合成Ti-Al-Fe2O3复合材料相形成动力学的两级建模

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525600627

A. G. Knyazeva, O. N. Kryukova

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Gas Fermentation: A Game-Changing Technology from Molecular Engineering to Bioreactors, Modeling, and Optimizing Processes and Apparatuses 气体发酵：一种改变游戏规则的技术，从分子工程到生物反应器，建模和优化过程和设备

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525600743

I. G. Nizovtseva, D. V. Chernushkin, A. V. Rezaykin, V. E. Svitich, A. E. Korenskaia, P. V. Mikushin, I. O. Starodumov

{"title":"Gas Fermentation: A Game-Changing Technology from Molecular Engineering to Bioreactors, Modeling, and Optimizing Processes and Apparatuses","authors":"I. G. Nizovtseva, D. V. Chernushkin, A. V. Rezaykin, V. E. Svitich, A. E. Korenskaia, P. V. Mikushin, I. O. Starodumov","doi":"10.1134/S0040579525600743","DOIUrl":"10.1134/S0040579525600743","url":null,"abstract":"Against the backdrop of an increasing global demand for sustainable energy sources, construction materials, and high-quality food to support a growing population, there is heightened research interest in the biotransformation of gaseous substrates. These substrates serve as critical sources of carbon and energy for unique microorganisms that utilize methane, carbon monoxide and carbon dioxide, and hydrogen as nutrients. In addition to the fundamental scientific interest in addressing the mathematical modeling challenges in the biophysics and biochemistry of microorganisms, this research area is characterized by its significant practical implications. Researchers are focusing on several task classes: the application of genetic engineering to optimize metabolic processes for the efficient production of a broad spectrum of products; the study of key biocatalytic enzymes; and the development of innovative engineering solutions for bioreactors. These novel reactor designs aim to enhance process controllability, safety, and efficiency while reducing production costs. To assess the comparative efficiency of existing and emerging bioreactors—particularly regarding mass transfer characteristics and energy consumption—a wide array of tools is now available. These include mathematical methods for describing two-phase gas–liquid systems and hydrodynamic processes, as well as advanced computational techniques such as supercomputing, machine learning algorithms, and neural networks. This work presents several examples and outlines contemporary trends in the development of gas fermentation.","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 5","pages":"1671 - 1682"},"PeriodicalIF":0.7,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676490","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

Polythermal Study of Component Solubility and Phase Equilibria in the Ternary Water–Dipropylamine–Diisopropylamine System for Extraction Applications 用于萃取应用的三元水-二丙胺-二异丙基胺体系中成分溶解度和相平衡的多热研究

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525600949

M. P. Smotrov, V. V. Danilina, K. K. Il’in, D. G. Cherkasov

{"title":"Polythermal Study of Component Solubility and Phase Equilibria in the Ternary Water–Dipropylamine–Diisopropylamine System for Extraction Applications","authors":"M. P. Smotrov, V. V. Danilina, K. K. Il’in, D. G. Cherkasov","doi":"10.1134/S0040579525600949","DOIUrl":"10.1134/S0040579525600949","url":null,"abstract":"Phase equilibria, mutual solubility of components, and critical phenomena were studied using the visual polythermal method in mixtures of the ternary water–dipropylamine–diisopropylamine system over the temperature range of –5 to 90°C. Polytherms of phase states were constructed for fourteen sections of the composition triangle, revealing phase separation into two liquid phases. At temperatures below 0°C, some mixtures formed saturated solutions with a solid ice phase. The temperature dependence of the compositions corresponding to critical solubility points was determined using the liquid-phase volume ratio method. Component solubility was measured at twelve temperatures, and isothermal phase diagrams were constructed at –5.0, –4.7, –3.0, –2.0, –1.9, 0.0, 10.0, 15.0, 25.0, 27.3, 30.0, and 90.0°C. The topological transformation of the phase diagram with temperature changes is typical for ternary liquid systems containing a binary liquid system with strong intermolecular interactions, which, in this case, is the dipropylamine–diisopropylamine system. At 27.3–90.0°C, a delamination field extends from the water–dipropylamine side of the composition triangle to the water–diisopropylamine side, while below 27.3°C, the two-liquid-phase region shifts toward the water–dipropylamine boundary. Delamination field becomes metastable in the range of –4.7 to ‒1.9°C. As the temperature decreases, mutual solubility increases, and the two-liquid-phase region shrinks. A dipropylamine–diisopropylamine mixture shows potential for water extraction, extractive salt crystallization, seawater desalination, and the treatment of hypersaline solutions.","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 6","pages":"1890 - 1899"},"PeriodicalIF":0.7,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676228","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}

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Hydrophobic Eutectic Solvents Based on Alcohol and Camphor in the Extraction of Fe(III) from Hydrochloric Solutions 基于酒精和樟脑的疏水共晶溶剂从盐酸溶液中萃取铁(III)

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525600664

A. V. Kozhevnikova, I. V. Zinov’eva, Yu. A. Zakhodyaeva, A. A. Voshkin

引用次数: 0

Physical and Chemical Principles of Increasing the Efficiency of the Methanol Desorption Process 提高甲醇脱附效率的理化原理

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525601116

D. M. Fedulov, T. S. Tsatsulina, A. G. Dedov

{"title":"Physical and Chemical Principles of Increasing the Efficiency of the Methanol Desorption Process","authors":"D. M. Fedulov, T. S. Tsatsulina, A. G. Dedov","doi":"10.1134/S0040579525601116","DOIUrl":"10.1134/S0040579525601116","url":null,"abstract":"During the extraction and low-temperature preparation of natural gas for transportation, water–methanol solutions are formed in concentrations of 30–60 wt %. High efficiency of methanol extraction from them and, thus, reduction of operating costs for industrial wastewater treatment can be achieved by using desorption processes. In this paper, the physicochemical principles of the technological process of methanol desorption from water–methanol solutions during the preparation of natural gas for transportation are considered. For this purpose, the phase behavior of a three-component mixture consisting of methane, methanol, and water is studied. The influence of the main factors affecting the process of methanol desorption from a water–methanol solution by primary separation gas is investigated (temperature, pressure, flow rate, and concentration of methanol in the irrigation flow), as well as the configuration of the low-temperature separation unit. It is shown that desorption in gas treatment units for transportation is carried out in the area of conditions that are non-optimal from the point of view of the technological process. This is due to the fact that the process under consideration is auxiliary in relation to the low-temperature preparation of the extracted reservoir product. Recommendations are given for optimizing the operation of existing gas preparation units and for the configuration of prospective gas preparation facilities.","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 6","pages":"2061 - 2072"},"PeriodicalIF":0.7,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676427","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}

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Development of a Mathematical Model for Vacuum Gas Oil Hydrotreating Considering the Kinetics of Desulfurization and Denitrogenation 考虑脱硫脱氮动力学的真空煤气加氢处理数学模型的建立

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525600640

N. I. Krivtsova, N. N. Gerasimova, K. N. Turalin, E. B. Krivtsov, D. O. Sudakov

{"title":"Development of a Mathematical Model for Vacuum Gas Oil Hydrotreating Considering the Kinetics of Desulfurization and Denitrogenation","authors":"N. I. Krivtsova, N. N. Gerasimova, K. N. Turalin, E. B. Krivtsov, D. O. Sudakov","doi":"10.1134/S0040579525600640","DOIUrl":"10.1134/S0040579525600640","url":null,"abstract":"A mathematical model is developed to describe the hydrotreating of vacuum gas oil, based on the transformation of individual sulfur- and nitrogen-containing compounds. The study presents an analysis of changes in the composition of nitrogen- and sulfur-containing compounds in vacuum gas oil during hydrotreatment in an industrial KT-1/1 unit. The results indicate that the degree of desulfurization does not exceed 93 rel %, with the products containing only dibenzothiophene homologs and benzonaphthothiophenes. Structural modifications in the average molecular composition of high- and low-molecular-weight nitrogenous bases result from hydrogenolysis of C–N and C–S bonds, hydrogenation of aromatic structures, and destruction of aliphatic molecular frameworks. The findings reveal that neutral and basic nitrogen compounds exhibit an inhibitory effect on the hydrodesulfurization of dibenzothiophene and benzonaphthothiophene derivatives, potentially due to competitive adsorption at the catalyst’s active sites. Using the developed mathematical model, the study demonstrates the influence of temperature on the residual sulfur and nitrogen content in vacuum gas oil hydrotreatment products.","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 5","pages":"1545 - 1557"},"PeriodicalIF":0.7,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676457","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

Fast Molecular Reconstruction of the Chemical Composition of Complex Hydrocarbon Mixtures 复杂烃类混合物化学组成的快速分子重建

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525601104

N. A. Glazov, A. N. Zagoruiko

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Theoretical Estimates of the Porosity of Raschig Rings in the Wall Region of a Packed Column 填料塔壁面拉希环孔隙率的理论估计

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525600779

A. B. Golovanchikov, N. A. Merentsov, M. V. Topilin, P. P. Zalipaev

引用次数: 0