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Theoretical Foundations of Chemical Engineering最新文献

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Phase Equilibria in Water–Salt Systems Containing Sodium and Calcium Chlorides and Urea at Temperatures below 0°C 温度低于 0°C 时含氯化钠和氯化钙以及尿素的水盐体系中的相平衡
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S0040579523050081
E. A. Frolova, D. F. Kondakov, V. P. Danilov
{"title":"Phase Equilibria in Water–Salt Systems Containing Sodium and Calcium Chlorides and Urea at Temperatures below 0°C","authors":"E. A. Frolova,&nbsp;D. F. Kondakov,&nbsp;V. P. Danilov","doi":"10.1134/S0040579523050081","DOIUrl":"10.1134/S0040579523050081","url":null,"abstract":"<p>Phase equilibria are studied in sections of the systems NaCl–CO(NH<sub>2</sub>)<sub>2</sub>–H<sub>2</sub>O, CaCl<sub>2</sub>–CO(NH<sub>2</sub>)<sub>2</sub>–H<sub>2</sub>O, and NaCl–CaCl<sub>2</sub>–CO(NH<sub>2</sub>)<sub>2</sub>–H<sub>2</sub>O at temperatures from 0 to –57°C. The features of the mutual influence of the components on the temperatures of the eutectics in the systems and on the deicing ability of urea–salt mixtures are determined. It is found that the introduction of urea into the systems CaCl<sub>2</sub>–H<sub>2</sub>O and NaCl–CaCl<sub>2</sub>–H<sub>2</sub>O gives rise to low-temperature eutectics with crystallization temperatures of –54 and –57°C, which are promising for the development of low-temperature deicing agents on their basis.</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":"139498669","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
Theory of a Solid–Liquid Heterogeneous Reaction to Form a Gas Phase 固液异相反应形成气相的理论
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S0040579523050482
V. P. Meshalkin, V. A. Orekhov, A. A. Bykov, V. I. Bobkov, A. I. Shinkevich
{"title":"Theory of a Solid–Liquid Heterogeneous Reaction to Form a Gas Phase","authors":"V. P. Meshalkin,&nbsp;V. A. Orekhov,&nbsp;A. A. Bykov,&nbsp;V. I. Bobkov,&nbsp;A. I. Shinkevich","doi":"10.1134/S0040579523050482","DOIUrl":"10.1134/S0040579523050482","url":null,"abstract":"<p>An analytical model of a solid–liquid heterogeneous reaction to form a gas phase was presented. The model is based on the analysis of the main parameters that have the most significant effect on the intensity of the reaction. The formation of gas–liquid dissipative structures in the form of alternating flows of reacting phases that perform relaxation pulsations was shown. The formation, detachment, and movement of bubbles were described with a satisfactory adequacy. The dynamics and conditions for the formation of a gas bubble on a solid reaction surface were characterized. Relationships were obtained for estimating the mass-transfer coefficients, which correlate with experimental data. The developed analytical model of the heterogeneous reaction will give a better insight into the essence of the melting processes in ore-thermal furnaces, which will make it possible to make changes to these processes using qualitatively new parameters of their characteristic reactions. Analysis of the hydrodynamics with the formation of the gas phase by analytical and numerical methods suggested the type of the flow of the liquid phase. Typical was the presence of hydrodynamic structures that determined the ordered movement of the liquid phase with various methods of supplying the gas phase. The values of critical mass-transfer parameters were determined. In contrast to the boiling process, a crisis of the heterogeneous reaction is impossible because of the shielding of the reaction surface.</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":"139754038","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 the Additivity of the Impact of Solar Spectrum Quanta Separately and after the Preliminary Proton Irradiation on the Optical Properties of a SiO2-Nanoparticle-Modified Barium Sulfate Powder 论太阳光谱量子分别和初步质子辐照后对二氧化硅纳米粒子修饰的硫酸钡粉末光学特性影响的叠加性
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S0040579523050202
M. M. Mikhailov, A. N. Lapin, S. A. Yuryev
{"title":"On the Additivity of the Impact of Solar Spectrum Quanta Separately and after the Preliminary Proton Irradiation on the Optical Properties of a SiO2-Nanoparticle-Modified Barium Sulfate Powder","authors":"M. M. Mikhailov,&nbsp;A. N. Lapin,&nbsp;S. A. Yuryev","doi":"10.1134/S0040579523050202","DOIUrl":"10.1134/S0040579523050202","url":null,"abstract":"<div><p><b>Abstract</b>—The work reports on studies of the diffuse reflectance spectra in situ recorded in vacuum for SiO<sub>2</sub>-nanoparticle-modified BaSO<sub>4</sub> micron-sized powders in the range of 0.2–2.2 μm before and after the separate solar spectrum quanta exposure and the successive irradiation after exposure to protons with energy of 5 keV. The absence of additivity upon the separate and successive solar spectrum quanta irradiation of the examined compound is established.</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":"142412194","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
Improvement of the Integrated Processing of Lead-Containing Gas-Cleaning Products from the Nickel Production of JSC Kola MMC 改进科拉金属矿业公司（JSC Kola MMC）镍生产过程中含铅气体净化产品的综合加工工艺
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S0040579523050032
N. S. Areshina, A. G. Kasikov, N. V. Eroshenko
{"title":"Improvement of the Integrated Processing of Lead-Containing Gas-Cleaning Products from the Nickel Production of JSC Kola MMC","authors":"N. S. Areshina,&nbsp;A. G. Kasikov,&nbsp;N. V. Eroshenko","doi":"10.1134/S0040579523050032","DOIUrl":"10.1134/S0040579523050032","url":null,"abstract":"<div><p>The distribution of chalcogens and noble metals during the processing of roasting dust from JSC Kola MMC is studied and it is found that these elements are present in all products of the process. Methods are proposed to obtain selenium–tellurium- and silver-containing concentrates, and also a concentrate of noble metals. Conditions are determined for the integrated processing of the dust and selenium dump waste product to obtain products that comply with the process operating procedure.</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":"142412210","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
Possibilities for Prediction And Evaluation of the Carbon Footprint in Furnace Fuel Oil Combustion in Medium- and Low-Power Boilers 预测和评估中、低功率锅炉燃烧炉用燃油的碳足迹的可能性
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S0040579523050470
T. Z. Maimekov, D. A. Sambaeva, M. B. Moldobaev, T. S. Bazhirov, Z. K. Maimekov
{"title":"Possibilities for Prediction And Evaluation of the Carbon Footprint in Furnace Fuel Oil Combustion in Medium- and Low-Power Boilers","authors":"T. Z. Maimekov,&nbsp;D. A. Sambaeva,&nbsp;M. B. Moldobaev,&nbsp;T. S. Bazhirov,&nbsp;Z. K. Maimekov","doi":"10.1134/S0040579523050470","DOIUrl":"10.1134/S0040579523050470","url":null,"abstract":"<p>To predict and evaluate the carbon footprint in the gas phase, furnace fuel oil oxidation in excess air (alpha factor 1.3) was studied over a wide temperature (<i>T =</i> 298–3000 K<i>, P =</i> 0.1 MPa). Equilibrium thermodynamic parameters (entropy, enthalpy, and internal energy) and the concentration distributions of C-, S-, N-, O-, and H-containing components and active particles in the gas phase were determined. Based on the total concentration distribution of C-, S-, N-, O-, and H-containing components and active particles in the gas phase, the weight content of carbon was calculated. Taking into account the chemical matrix of the furnace fuel oil–air system and the weight content of carbon, the man-made load of carbon in the gas phase was found. The results of the work made it possible to evaluate the carbon footprint in the gas phase because of the combustion of fuel, in particular, furnace fuel oil in air. Reduction of the man-made load of carbon oxides (CO, CO<sub>2</sub>) in the gas phase was achieved by modifying and burning furnace fuel oil in the form of oil-in-water (reverse) emulsions in E-1/9M industrial boilers.</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":"142412137","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
Use of Ionic Liquids and Binary Extractants in Extraction 在萃取中使用离子液体和二元萃取剂
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S0040579523050044
V. V. Belova, A. I. Khol’kin
{"title":"Use of Ionic Liquids and Binary Extractants in Extraction","authors":"V. V. Belova,&nbsp;A. I. Khol’kin","doi":"10.1134/S0040579523050044","DOIUrl":"10.1134/S0040579523050044","url":null,"abstract":"<div><p>A short review of the literature data on extraction with hydrophobic bifunctionalized ionic liquids and binary extractants is given to show that these compounds are identical in their compositions and properties. It is noted that the papers on binary extractants were published earlier than the first papers on extraction with bifunctionalized ionic liquids. In contrast to the extraction systems with ionic liquids, extraction processes in the systems with binary extractants are studied in greater detail and grouped into a special class, i.e., binary extraction. It is shown that the main regularities of the distribution of the components in the extraction systems with binary extractants depend on the type of chemical reaction and the character of the interphase distribution.</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":"139498410","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
Comparative Calculation of the Interphases Heat and Mass Transfer in Spray Apparatus for the Regimes of Cocurrent and Countercurrent of Phases with Consideration of the Drag Crisis and Heat and Mass Transfer Crisis 考虑到阻力危机和传热传质危机的喷雾装置中相间传热传质的同流和逆流状态的比较计算
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S0040579523050536
N. N. Simakov
{"title":"Comparative Calculation of the Interphases Heat and Mass Transfer in Spray Apparatus for the Regimes of Cocurrent and Countercurrent of Phases with Consideration of the Drag Crisis and Heat and Mass Transfer Crisis","authors":"N. N. Simakov","doi":"10.1134/S0040579523050536","DOIUrl":"10.1134/S0040579523050536","url":null,"abstract":"<p>The article presents new details of an algorithm and compares the results of calculating the heat and mass transfer of water and air in spray apparatus for the regimes of cocurrent and countercurrent of phases, taking into account the early crisis of drops drag and the accompanying crisis of heat and mass transfer. The mathematical model used is based on nonstationary differential equations for the flow of a compressible medium, supplemented with the equations of heat and mass transfer from drops to the gas. The known explicit Lax–Wendroff scheme is used in difference analogs of the equations of continuity and phases flow. The distributions of phases velocities and temperatures, and densities of water vapor in air and saturated vapor near the surface of drops in the two-phase flow are calculated to compare the co- and countercurrent flows of phases through the cylindrical apparatus. In particular, the calculations determined the dependences of the average temperatures of the gas and the liquid over the outlet section of the apparatus for each phase on the gas flow through it.</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":"142412124","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
Additive Technologies for Medicine, Pharmacy, and Chemical Industry: Applications and Outlook 用于医药、制药和化工行业的添加剂技术：应用与展望
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S0040579523050342
A. A. Abramov, N. V. Men’shutina
{"title":"Additive Technologies for Medicine, Pharmacy, and Chemical Industry: Applications and Outlook","authors":"A. A. Abramov,&nbsp;N. V. Men’shutina","doi":"10.1134/S0040579523050342","DOIUrl":"10.1134/S0040579523050342","url":null,"abstract":"<p>The article discusses the main methods and technologies of three-dimensional printing. The basic principles are presented for technologies that are implemented in powder, polymerization, and extrusion methods of additive manufacturing. The main applications of additive technologies in medicine, pharmacy, and chemical engineering are considered. Based on the review made, conclusions were drawn about the existing problems and limitations that do not allow the integration of additive processes into industry. In addition, the prospects for the development of additive technologies in these applications are considered.</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":"142412209","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
Interaction of Tungsten-Containing Mineral Raw Materials with a Mixture of Ammonium Bifluoride and Sulfate 含钨矿物原料与氟化氢铵和硫酸盐混合物的相互作用
IF 0.8 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/s0040579523320039
M. A. Medkov, G. F. Krysenko, D. G. Epov, E. E. Dmitrieva, E. B. Merkulov
{"title":"Interaction of Tungsten-Containing Mineral Raw Materials with a Mixture of Ammonium Bifluoride and Sulfate","authors":"M. A. Medkov, G. F. Krysenko, D. G. Epov, E. E. Dmitrieva, E. B. Merkulov","doi":"10.1134/s0040579523320039","DOIUrl":"https://doi.org/10.1134/s0040579523320039","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The interaction of tungsten mineral raw materials with a mixture of NH<sub>4</sub>HF<sub>2</sub> and (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> upon heating was studied. It was determined that, first, at temperatures up to 200°C, the incoming components are fluorinated to form complex and simple fluorides. A further increase in temperature is accompanied by the decomposition of ammonium sulfate to form NH<sub>4</sub>HSO<sub>4</sub>, which leads to the conversion of fluorides into sulfates and of the tungsten ammonium fluoride complex into tungstic acid H<sub>2</sub>WO<sub>4</sub>. It was shown that water leaching of the product of the decomposition of tungsten-containing mineral raw materials with a mixture of NH<sub>4</sub>HF<sub>2</sub> and (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> makes it possible to extract tungsten from mineral raw materials in the form of the commercial product WO<sub>3</sub>.</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":"139498665","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
Ammonium Salts in the Production of Emulsion Rubbers 铵盐在乳液橡胶生产中的应用
IF 0.7 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI: 10.1134/S004057952305024X
N. S. Nikulina, L. A. Vlasova, V. N. Verezhnikov, S. S. Nikulin, I. N. Pugacheva
{"title":"Ammonium Salts in the Production of Emulsion Rubbers","authors":"N. S. Nikulina,&nbsp;L. A. Vlasova,&nbsp;V. N. Verezhnikov,&nbsp;S. S. Nikulin,&nbsp;I. N. Pugacheva","doi":"10.1134/S004057952305024X","DOIUrl":"10.1134/S004057952305024X","url":null,"abstract":"<p>The coagulation ability of organic and inorganic quaternary ammonium salts is assessed comparatively. It is found that the replacement of a hydrogen atom in ammonium chloride with an alkyl radical decreases the consumption of the coagulation agent. The best results are achieved when tetraethylammonium chloride is used as a coagulant. The resulting rubbers and vulcanizates meet the requirements according to their main indicators.</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":"139498625","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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