Theoretical Foundations of Chemical Engineering最新文献_第10页

Temperature Dependence of Henry Constants of Radon Adsorption on Activated Carbons 氡在活性炭上吸附的亨利常数的温度依赖性

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525600731

E. P. Magomedbekov, A. O. Merkushkin, A. V. Obruchikov, V. S. Pokalchuk, N. N. Kulov

引用次数: 0

Capture of Fine Particles by a Multivortex Separator in a Paint Drying Chamber 涂料干燥室中多涡分离器对细颗粒的捕获

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525600421

V. E. Zinurov, R. Ya. Bikkulov, A. V. Dmitriev, A. A. Abdullina

{"title":"Capture of Fine Particles by a Multivortex Separator in a Paint Drying Chamber","authors":"V. E. Zinurov, R. Ya. Bikkulov, A. V. Dmitriev, A. A. Abdullina","doi":"10.1134/S0040579525600421","DOIUrl":"10.1134/S0040579525600421","url":null,"abstract":"Paint spraying and drying booths are widely used in various industries. During spraying paint and varnish materials, a significant amount of contaminants—paint mist particles—is generated inside the booth, making their capture an important task. Failure to address this issue may lead to explosive hazards, violations of sanitary and environmental regulations, defects in coated parts, and other negative consequences. Ceiling and floor filters are commonly used for this purpose, but they are typically imported and require regular replacement, usually once a month. Therefore, extending their service life is an urgent task. This paper aims to develop a separation device to extend the service life of floor and ceiling filters in a paint-drying booth and enhance the overall efficiency of fine particle capture. The article presents the design of a multivortex separator and describes its operating principle. The direct application of the multivortex separator in a paint-spraying drying chamber at Kamatek Ltd. is considered. To increase filter longevity, it is proposed to install the separator upstream of either the floor or ceiling filters. The efficiency of the multivortex separator was calculated for two installation configurations within the paint-drying booth. Based on the efficiency calculations, the following conclusions were drawn: when the separator is installed upstream of the floor filters (with an inlet velocity of 0.3 m/s), its efficiency averages 45% for particles sized 1 to 10 µm; when installed upstream of the ceiling filters in the narrow section (with an inlet velocity of 5 m/s), its efficiency averages 88% for particles of the same size range. In practical terms, installing the multivortex separator before the ceiling fine filters is more effective, as it achieves higher efficiency with minimal capital investment.","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 5","pages":"1790 - 1793"},"PeriodicalIF":0.7,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676372","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

The Influence of Surface Tension of Intrapore Fluid on the Structural and Surface Properties of Silicon Dioxide Obtained from Nepheline-Containing Raw Materials 孔内流体表面张力对含钠原料制备二氧化硅结构和表面性能的影响

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525601189

D. V. Mayorov

{"title":"The Influence of Surface Tension of Intrapore Fluid on the Structural and Surface Properties of Silicon Dioxide Obtained from Nepheline-Containing Raw Materials","authors":"D. V. Mayorov","doi":"10.1134/S0040579525601189","DOIUrl":"10.1134/S0040579525601189","url":null,"abstract":"The article presents the results of research on the effect of intrapore fluid surface tension on the structural and surface properties (specific surface area, pore volume, and pore size distribution) of silica (SiO2) synthesized via the acid decomposition of nepheline mineral raw materials. The synthesized samples were analyzed using chemical and X-ray diffraction (XRD) methods, as well as the Brunauer–Emmett–Teller (BET) method for determining specific surface area and the Barrett–Joyner–Halenda (BJH) method for pore size distribution. Equations were obtained linking the specific surface area, pore volume, and pore diameter of the synthesized SiO2 samples to the surface tension of the intrapore medium. It was shown that replacing the aqueous medium in the pore space with an organic liquid before drying significantly (~2 times) increases the adsorption monolayer capacity and affects the pore volume distribution. Based on the specific surface capacity of SiO2 samples and Gibbs free energy (ΔG°) changes during sorption, it was concluded that the synthesis method does not significantly affect the physicochemical properties of their surfaces (the type and number of sorption sites per unit area) or the nitrogen sorption mechanism.","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 5","pages":"1776 - 1783"},"PeriodicalIF":0.7,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676409","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

Dynamics of Two-Stage Catalytic Reactions with Marcelin-de Donde Kinetics in an Open System 开放体系中两级催化反应动力学及Marcelin-de - Donde动力学

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525600925

N. I. Koltsov

引用次数: 0

Study of Favipiravir Micronization by Rapid Expansion of a Supercritical Solution 超临界溶液快速膨胀法匹拉韦微粉化研究

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525600846

P. Yu. Tsygankov, A. Yu. Kislinskaya, E. A. Pashkin, N. V. Men’shutina

引用次数: 0

Mechanism of Degradation of Polymer Fuel Cell Cathode Catalyst: Research and Modeling 聚合物燃料电池阴极催化剂降解机理的研究与模拟

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525601001

E. M. Koltsova, V. A. Vasilenko, A. V. Zhensa, V. A. Bogdanovskaya, M. V. Radina

引用次数: 0

Thermodynamic Analysis of Liquid–Vapor Phase Equilibrium in Binary Systems with One Associating Component 单组分二元体系液-气相平衡的热力学分析

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525600895

V. A. Lotkhov, S. Ya. Kvashnin, A. V. Polkovnichenko, N. N. Kulov

引用次数: 0

Experimental Study of Hydrodynamics and Mass Transfer in Microchannels for Designing Microreactors and Microextractors 微反应器和微萃取器设计中流体力学和传质实验研究

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525600615

A. A. Yagodnitsyna, A. V. Kovalev, A. V. Bilsky

{"title":"Experimental Study of Hydrodynamics and Mass Transfer in Microchannels for Designing Microreactors and Microextractors","authors":"A. A. Yagodnitsyna, A. V. Kovalev, A. V. Bilsky","doi":"10.1134/S0040579525600615","DOIUrl":"10.1134/S0040579525600615","url":null,"abstract":"The development of continious single-phase and two-phase microreactors and microextractors requires information on the hydrodynamics of the flows in such devices: velocity and vorticity distributions, mixing efficiency, and two-phase flow regimes, and their influence on the mass-transfer rate. The paper presents studies of the local hydrodynamic characteristics of flow and mass-transfer processes in T-type microchannels using optical techniques. For a single-phase microreactor, the velocity fields and concentration fields are measured. The intensification of mixing during the transition to the engulfment flow regime is shown. For two-phase microreactors with different sets of immiscible liquids, flow regimes are visualized, and a dimensionless complex for generalizing the experimental data is proposed. It is shown that neural-network algorithms trained on a large sample allow predicting flow regimes with high accuracy (up to 98%). The slug flow regime with superposition of external pressure pulsations of the dispersed phase is investigated. It is shown that the velocity field inside the plugs changes periodically, which can be used to intensify mass transfer. Using the micron-resolution laser-induced fluorescence (micro-LIF) technique, local mass transfer in a two-phase microextractor is studied.","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 5","pages":"1504 - 1517"},"PeriodicalIF":0.7,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676459","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

Application of Magnetic Liquids as Cooling Agents in Condensers of Rectification Columns on the Example of Hydrogen Peroxide Production 磁性液体作为冷却剂在精馏塔冷凝器中的应用——以过氧化氢生产为例

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525601050

V. M. Khairutdinova, V. A. Naletov, L. V. Ravichev, A. Yu. Naletov, M. B. Glebov

{"title":"Application of Magnetic Liquids as Cooling Agents in Condensers of Rectification Columns on the Example of Hydrogen Peroxide Production","authors":"V. M. Khairutdinova, V. A. Naletov, L. V. Ravichev, A. Yu. Naletov, M. B. Glebov","doi":"10.1134/S0040579525601050","DOIUrl":"10.1134/S0040579525601050","url":null,"abstract":"The possibility of using magnetic fluids as a cooling agent in condensers of distillation columns is considered. It is known that the energy costs for condensing vapors and cooling the product in condensers of distillation columns can constitute a significant part of the total costs. Therefore, a number of studies are devoted to the problem of their reduction. These include the use of thermal integration, new designs of heat-transfer equipment, and the development of more efficient cooling agents. The latter include specially developed magnetic fluids. Due to a number of unique thermal–physical properties, they find a wide variety of technological applications, including the intensification of heat transfer in rectification columns. The aim of this work was to evaluate the reduction of energy costs for condensation of vapors in the condenser of a distillation column by replacing traditional cooling agents (water, brines, etc.) with magnetic fluid solutions. This assessment is carried out using the example of columns for the extraction of acetone and isopropyl alcohol in the production of hydrogen peroxide. The following magnetic fluids are considered: an aqueous solution of aluminum oxide nanoparticles, an aqueous solution of copper oxide nanoparticles, and an aqueous solution of single-walled carbon nanotubes (SWCNT). The volume content of the metal oxide particles varies from 0 to 6%. The dependences of the growth of the heat-transfer coefficient on the volume content of the metal oxide nanoparticles and SWCNT particles are obtained. Comparison of the efficiency of using the three selected nanofluids shows that the greatest increase in the heat-transfer coefficient occurs when using SWCNT.","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"58 6","pages":"2003 - 2008"},"PeriodicalIF":0.7,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676462","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

A New Approach to Formulating Low-Viscosity Marine Fuels 配制低粘度船用燃料的新途径

IF 0.7 4区工程技术

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-23 DOI: 10.1134/S0040579525600792

S. G. Dyachkova, Zh. N. Artemeva

引用次数: 0