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Composite Photocurable Materials for Repair Purposes 用于修复的复合光固化材料
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S0040579523310020
O. E. Babkin, L. A. Babkina, V. V. Il’ina, O. S. Aikasheva, K. V. Izotova
{"title":"Composite Photocurable Materials for Repair Purposes","authors":"O. E. Babkin,&nbsp;L. A. Babkina,&nbsp;V. V. Il’ina,&nbsp;O. S. Aikasheva,&nbsp;K. V. Izotova","doi":"10.1134/S0040579523310020","DOIUrl":"10.1134/S0040579523310020","url":null,"abstract":"<div><p>The work considers principles for the design of photocurable repair-purpose materials, the main advantage of which is the possibility of rapid formation of high-strength, adhesive, jointless coatings and coverings for sealing, insulation, protection, and repair of surfaces of various natures, such as metal, concrete, and plastic. The application of such materials is validated in the practice of pipeline repair (including oil pipelines and mud lines).</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412149","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
On Separation of Rare-Earth Metals in Cascade of Sieve Tray Extraction Columns in the Liquid–Liquid Chromatography Mode 论液液色谱模式下筛盘萃取柱串联分离稀土金属
IF 0.8 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/s0040579523050329
Yu. V. Tsareva, D. A. Vorotov, V. V. Belova, A. E. Kostanyan
{"title":"On Separation of Rare-Earth Metals in Cascade of Sieve Tray Extraction Columns in the Liquid–Liquid Chromatography Mode","authors":"Yu. V. Tsareva, D. A. Vorotov, V. V. Belova, A. E. Kostanyan","doi":"10.1134/s0040579523050329","DOIUrl":"https://doi.org/10.1134/s0040579523050329","url":null,"abstract":"<p>This article presents the experimental results of extraction chromatography separation in a cascade of sieve tray extraction columns operating in the mode of continuous flow of the disperse mobile phase. The possibility of extraction separation of rare-earth metals in a cascade of sieve tray extraction columns operating in the liquid–liquid chromatography mode is demonstrated.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139498518","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
Simulation of a Fuel Reactor for Chemical Looping Combustion with Oxygen Uncoupling 模拟氧脱偶化学循环燃烧的燃料反应堆
IF 0.8 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/s0040579523050299
R. A. Shishkin
{"title":"Simulation of a Fuel Reactor for Chemical Looping Combustion with Oxygen Uncoupling","authors":"R. A. Shishkin","doi":"10.1134/s0040579523050299","DOIUrl":"https://doi.org/10.1134/s0040579523050299","url":null,"abstract":"<p>Chemical looping with oxygen uncoupling (CLOU), an environmentally friendly method for power generation, has been extensively developed in recent years. The main disadvantages of this method, associated with incomplete fuel combustion, ash withdrawal, and dust entrainment, can be solved by changing the structural and process parameters. The simplest fuel reactor for the combustion of methane gas is considered using computer simulation. The gas-phase pressure distribution and its velocity gradient in transverse and longitudinal cross-sections of the reactor are studied in the present work. Using the obtained data, the maximum power of the fuel reactor for implementing the CLOU process is calculated and the requirements for an oxygen accumulator to achieve the claimed performance are formulated.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139498609","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
Sorption of Rare-Earth Metals, Uranium, and Thorium on Phosphor-Containing Solid Extragents of Russian Manufacturing 稀土金属、铀和钍在俄罗斯制造业含磷固体挤出物上的吸附作用
IF 0.8 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/s0040579523050226
V. V. Milutin, N. A. Nekrasova
{"title":"Sorption of Rare-Earth Metals, Uranium, and Thorium on Phosphor-Containing Solid Extragents of Russian Manufacturing","authors":"V. V. Milutin, N. A. Nekrasova","doi":"10.1134/s0040579523050226","DOIUrl":"https://doi.org/10.1134/s0040579523050226","url":null,"abstract":"<p>Studies on the sorption of rare-earth metals, uranium, and thorium from nitric acid solutions on different phosphor-containing solid extragents produced by the Russian ZAO Axion-RDM are performed. It is demonstrated that effective extraction of REM on phosphor-containing solid extragents is possible from solutions with HNO<sub>3</sub> concentration up to 0.1 M and extraction of uranium and thorium from solutions of up to 6 M.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139498616","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
Synthesis of Pd(0)/C by Pyrolysis of the Cellulose–Saccharose–Palladium Nitrate Powder Composite 通过热解纤维素-糖-硝酸钯粉复合材料合成 Pd(0)/C
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S0040579523050305
A. B. Shishmakov, Yu. V. Mikushina, O. V. Koryakova
{"title":"Synthesis of Pd(0)/C by Pyrolysis of the Cellulose–Saccharose–Palladium Nitrate Powder Composite","authors":"A. B. Shishmakov,&nbsp;Yu. V. Mikushina,&nbsp;O. V. Koryakova","doi":"10.1134/S0040579523050305","DOIUrl":"10.1134/S0040579523050305","url":null,"abstract":"<div><p>Pyrolysis of cellulose powder granules impregnated with an aqueous solution of saccharose and palladium nitrate gave granular Pd/C carbons with 1–9 wt % metal. It was shown by X-ray diffraction analysis and electronic microscopy that palladium is present in the carbon matrix in the form of Pd(0) nanoparticles with sizes of 10–30 nm in the main fraction (~95%). Palladium nanoparticles are localized inside the saccharose carbonizate layer and on its surface. An IR spectral study showed that pyrolysis of the cellulose–saccharose powder composite in the presence of palladium nitrate leads to the appearance of ester groups in the carbonizate. An increase in the palladium nitrate content in the cellulose powder leads to lower yields of the carbonizate and larger metal nanoparticles in carbon. The specific catalytic activity of nanoparticles in the model decomposition reaction of hydrogen peroxide was found to be the same for all palladium-containing carbons.</p></div>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412127","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
Prediction of Smoke Points of Kerosene Distillates Using Simple Laboratory Tests: Artificial Neural Network versus Conventional Correlations 利用简单的实验室测试预测煤油馏分的烟点：人工神经网络与传统相关性比较
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S0040579523050366
Kahina Bedda
{"title":"Prediction of Smoke Points of Kerosene Distillates Using Simple Laboratory Tests: Artificial Neural Network versus Conventional Correlations","authors":"Kahina Bedda","doi":"10.1134/S0040579523050366","DOIUrl":"10.1134/S0040579523050366","url":null,"abstract":"<p>In the present study, an artificial neural network (ANN) model and three well-known correlations were used to predict the smoke points of 430 kerosene distillates from their specific gravities and distillation temperatures. The ANN model was developed in MATLAB software, it is a feedforward multilayer perceptron with a single hidden layer. The optimal number of neurons in the hidden layer as well as the best training algorithm and the best values of connection weights and biases were determined by trial and error using the nftool command. The early stopping technique by cross-validation was employed to avoid overfitting of the model. The developed model composed of 17 sigmoid hidden neurons and one linear output neuron was trained with the Levenberg-Marquardt backpropagation algorithm. This model allowed the prediction of smoke points with a coefficient of determination of 0.852, an average absolute deviation of 1.4 mm and an average absolute relative deviation of 6%. Statistical analysis of the results indicated that the prediction accuracy of the ANN model is higher than that of the conventional correlations. Indeed, in addition to its effectiveness, the proposed ANN method for the estimation of smoke points has the advantages of low-cost and easy implementation, as it relies on simple laboratory tests. Thus, the developed ANN model is a reliable tool that can be used in petroleum refineries for fast quality control of kerosene distillates.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139498667","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 Role of Energodynamics in the Scientific Bases of Chemical Technology 能源动力学在化工技术科学基础中的作用
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S0040579523050408
I. N. Dorokhov
{"title":"The Role of Energodynamics in the Scientific Bases of Chemical Technology","authors":"I. N. Dorokhov","doi":"10.1134/S0040579523050408","DOIUrl":"10.1134/S0040579523050408","url":null,"abstract":"<p>The article presents a compact and exhaustive interpretation of the foundations of energodynamics and shows that it significantly extends the horizons of natural science and opens new avenues to improve the scientific bases of chemical technology.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412193","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
Decomposition of Mineral Raw Materials Using a Mixture of Ammonium Hydrodifluoride and Sulfate 使用氟氢化铵和硫酸盐混合物分解矿物原料
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S0040579523050196
M. A. Medkov, G. F. Krysenko, D. G. Epov, E. E. Dmitrieva, S. I. Ivannikov, V. P. Molchanov
{"title":"Decomposition of Mineral Raw Materials Using a Mixture of Ammonium Hydrodifluoride and Sulfate","authors":"M. A. Medkov,&nbsp;G. F. Krysenko,&nbsp;D. G. Epov,&nbsp;E. E. Dmitrieva,&nbsp;S. I. Ivannikov,&nbsp;V. P. Molchanov","doi":"10.1134/S0040579523050196","DOIUrl":"10.1134/S0040579523050196","url":null,"abstract":"<p>The interaction of gold-containing rock and titanium-containing mineral raw materials with a mixture of ammonium hydrodifluoride NH<sub>4</sub>HF<sub>2</sub> and ammonium sulfate (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> at temperatures below 430°C has been studied. A comparative analysis showed that the use of a mixture of NH<sub>4</sub>HF<sub>2</sub> and (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> allows more complete winning of mineral raw materials compared to the use of ammonium hydrodifluoride alone. The mixture of NH<sub>4</sub>HF<sub>2</sub> and (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> is recommended as a new promising reagent for the decomposition of rocks and mineral raw materials for complete extraction of the product into solution during water leaching.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412133","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
Study of Thermal Decomposition of Layered Double-Magnesium Aluminum Hydroxide 层状双氢氧化镁铝的热分解研究
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S0040579523050184
D. V. Maiorov, E. K. Kopkova
{"title":"Study of Thermal Decomposition of Layered Double-Magnesium Aluminum Hydroxide","authors":"D. V. Maiorov,&nbsp;E. K. Kopkova","doi":"10.1134/S0040579523050184","DOIUrl":"10.1134/S0040579523050184","url":null,"abstract":"<p>Layered magnesium aluminum hydroxide Mg<sub>4</sub>Al<sub>2</sub>(OH)<sub>12</sub>CO<sub>3</sub>⋅3.85H<sub>2</sub>O with the hydrotalcite structure is obtained by the solid-phase interaction of AlCl<sub>3</sub>⋅6H<sub>2</sub>O and MgCl<sub>2</sub>⋅6H<sub>2</sub>O with (NH<sub>4</sub>)<sub>2</sub>CO<sub>3</sub> at room temperature. The change in the phase composition of the products of its heat treatment in the temperature range 180–600°C is studied. It is determined by DSC/TG that the thermal decomposition occurs in two stages: the first stage occurs in the temperature range 180–215°C; the second, in the range 400–440°C. The apparent activation energies <i>E</i><sub>a</sub> of both stages of thermal decomposition are found by the model-free Kissinger method to be 62.85 and 141.86 kJ/mol, respectively. The obtained <i>E</i><sub>a</sub> values agree well with the literature data and indicate that both stages are single-step kinetic processes.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412198","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
Parametric Analysis of a Mathematical Model of a Catalytic Oscillator 催化振荡器数学模型的参数分析
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S0040579523050494
A. Ya. Naimov, S. L. Nazanskii, V. I. Bykov
{"title":"Parametric Analysis of a Mathematical Model of a Catalytic Oscillator","authors":"A. Ya. Naimov,&nbsp;S. L. Nazanskii,&nbsp;V. I. Bykov","doi":"10.1134/S0040579523050494","DOIUrl":"10.1134/S0040579523050494","url":null,"abstract":"<p>In some cases, a reaction in the oscillatory mode has a higher selectivity for the target product. To organize production in this mode, it is necessary to determine the conditions under which fluctuations occur, as well as to consider the very nature of the fluctuations. In this work, a parametric analysis of the basic kinetic model of an oscillatory reaction without autocatalysis was made. The boundaries of the parameters at which the system oscillates were found. Phase portraits of the system and bifurcation curves were constructed. Stationary states of the system were analyzed. The type and number of stationary states were identified. It was shown that the system at certain parameters has three stationary states: two unstable nodes and a saddle. Parametric analysis of basic models will allow selecting initial approximations for calculations of more complex models of real reactions.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412111","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
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