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Oxidative Conversion of Gaseous Alkanes C3-C4 in the Barrier Discharge Plasma 阻挡放电等离子体中气态烷烃C3-C4的氧化转化
IF 0.4
Journal of Siberian Federal University. Chemistry Pub Date : 2019-03-01 DOI: 10.17516/1998-2836-0112
V. K. Sergey, Ryabov Andrey Yu., N. O. Andrey
{"title":"Oxidative Conversion of Gaseous Alkanes C3-C4 in the Barrier Discharge Plasma","authors":"V. K. Sergey, Ryabov Andrey Yu., N. O. Andrey","doi":"10.17516/1998-2836-0112","DOIUrl":"https://doi.org/10.17516/1998-2836-0112","url":null,"abstract":"The oxidative conversion of gaseous alkanes C3-C4 in the barrier discharge plasma into valuable oxygenates is investigated. The process of transformation has the single stage and carried out without catalyst using and under on the temperature of environment. The main products are hydroxyl and carbonyl compounds with the amount of carbon atoms equaled to the same amount of carbon atoms in initial gaseous hydrocarbons as opposed to partial oxidation of propane and butanes with the main products of methanol, acetaldehyde, formaldehyde, lower carbon acids, and carbon oxides. To avoid the formation of deposit on the electrode surface we add vapors of liquid hydrocarbon (octane) into a gaseous hydrocarbons feedstock. The mechanism of gaseous alkanes oxidation process implying the dissociation of oxygen and alkane molecules by means of the impact of barrier discharge electron is proposed. The proposed mechanism of oxidation of gaseous hydrocarbons resembles the mechanism of oxidation of liquid alkanes. In both cases the main products (hydroxyl and carbonyl compounds) are produced due to the fact of undergoing of the disproportination reaction of the peroxide radicals.","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90271563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 Dissolution of Weakly Soluble Salts in the Presence of Complexing Agents 弱溶盐在络合剂作用下溶解的模拟
IF 0.4
Journal of Siberian Federal University. Chemistry Pub Date : 2019-03-01 DOI: 10.17516/1998-2836-0079
I Korobeinikov Artem, N. Sergey
{"title":"Modeling of Dissolution of Weakly Soluble Salts in the Presence of Complexing Agents","authors":"I Korobeinikov Artem, N. Sergey","doi":"10.17516/1998-2836-0079","DOIUrl":"https://doi.org/10.17516/1998-2836-0079","url":null,"abstract":"A mathematical algorithm for ionic equilibria modeling of dissolving weakly soluble salts in the presence of complexing agents or in an overage of an anion that form weakly soluble compounds in water solutions was developed. For numerical methods for calculation of chemical equilibria that involve ionic compounds a set of simplifications are formulated. This simplifications allows to significantly reduce the required computational operations while make it possible to preserve the functionality of numerical methods for solving such ionic equilibria. To verify the algorithm some systems that was studied experimentally were modelled. The maximum divergence between calculated and experimental data was 38%. Some general problems of switch-over from the experimental determination to the mathematical modeling of ionic equilibria and sedimentation in solution were emphasized.","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89419994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 Physical-Chemical and Fire Hazard Characteristics by Carbon Chain Rules 2. Carboxylic Acids 基于碳链规则的物化、火灾危险特性预测羧酸
IF 0.4
Journal of Siberian Federal University. Chemistry Pub Date : 2019-03-01 DOI: 10.17516/1998-2836-0105
G. Sergey, Mashines” Ub Ras, S. Kirill, M Barbin Nicolay, L Alexeeva Darya
{"title":"Prediction of Physical-Chemical and Fire Hazard Characteristics by Carbon Chain Rules 2. Carboxylic Acids","authors":"G. Sergey, Mashines” Ub Ras, S. Kirill, M Barbin Nicolay, L Alexeeva Darya","doi":"10.17516/1998-2836-0105","DOIUrl":"https://doi.org/10.17516/1998-2836-0105","url":null,"abstract":"Sergey G. Alexeev*a,b, Kirill S. Alexeeva,c, Nicolay M. Barbinb,c and Dar’ya L. Alexeevad aScience and Engineering Centre “Reliability and Safety of Large Systems and Mashines” UB RAS 54а Studencheskaya Str., Yekaterinburg, 620049, Russia bUral Institute of State Fire Service of Emercom of Russia 22 Mira Str., Yekaterinburg, 620062, Russia cUral State Agrarian University 42 Karla Libknekhta Str., Yekaterinburg, 620075, Russia dChemical Technology Institute of Ural Federal University named by the first President of Russia B.N. El’tzin 28 Mira Str., Yekaterinburg, 620062, Russia","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83316980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Production of Aromatic Hydrocarbons from C3, C4-alkanes Over Zeolite Catalysts 沸石催化剂催化C3、c4烷烃生产芳烃的研究
IF 0.4
Journal of Siberian Federal University. Chemistry Pub Date : 2019-03-01 DOI: 10.17516/1998-2836-0114
A. Anton, N. V. Ludmila, G. Irina, V. Alexander
{"title":"Production of Aromatic Hydrocarbons from C3, C4-alkanes Over Zeolite Catalysts","authors":"A. Anton, N. V. Ludmila, G. Irina, V. Alexander","doi":"10.17516/1998-2836-0114","DOIUrl":"https://doi.org/10.17516/1998-2836-0114","url":null,"abstract":"An aluminosilicate and a galloaluminosilicate of MFI structure are synthesized by the hydrothermal method from alkaline aluminosilicates. Structural, acidic, and catalytic properties of synthesized zeolites are investigated in the course of dehydrocyclization of lower alkanes. It is found out that aromatic hydrocarbons are formed in their highest amount when butane is converted over the galloaluminosilicate, while the lowest amount of them is resulted from the conversion of propane over the aluminosilicate. It is shown that to achieve the nigh conversion of propane and butane and the yield of desired product in the presence of the catalysts under study, the process temperature during the propane conversion should be 50 degrees higher under the same other reaction conditions.","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75314193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Electrochemical Behavior of Palladium-Containing Nanoparticles on a Carbon Electrode in Hydrochloric Acid Solutions 含钯纳米颗粒在碳电极上在盐酸溶液中的电化学行为
IF 0.4
Journal of Siberian Federal University. Chemistry Pub Date : 2019-03-01 DOI: 10.17516/1998-2836-0107
S. Alexander, N. L. Maxim, A. Anton, L. M. Yuri
{"title":"Electrochemical Behavior of Palladium-Containing Nanoparticles on a Carbon Electrode in Hydrochloric Acid Solutions","authors":"S. Alexander, N. L. Maxim, A. Anton, L. M. Yuri","doi":"10.17516/1998-2836-0107","DOIUrl":"https://doi.org/10.17516/1998-2836-0107","url":null,"abstract":"The electrochemical behavior of metallic palladium nanoparticles obtained by reducing H2PdCl4 with formaldehyde and the products of the interaction of H2PdCl4 with sodium sulfide with a different ratio of reagents in a solution of hydrochloric acid was studied by the method of cyclic voltammetry. Voltammograms of metallic and sulfide nanoparticles were obtained, and interpretation was given to the observed electrochemical processes. The initial and oxidized systems with different potential values were characterized by X-ray photoelectron spectroscopy (XPS). It is shown that palladium sulfide nanoparticles, obtained at high molar ratios of reagents (S/Pd = 3:1), are more resistant to oxidative and reducing effects than those obtained at low molar ratios (S/Pd = 1:1).","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76534717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 Methane Aromatization over Mo-Containing Zeolite Catalysts with a Hierarchical Pore System 含钼分子筛分级孔系催化剂上甲烷芳构化的研究
IF 0.4
Journal of Siberian Federal University. Chemistry Pub Date : 2019-03-01 DOI: 10.17516/1998-2836-0111
L Korobitsyna Lyudmila, N. Konstantin, V. Alexander
{"title":"Study of Methane Aromatization over Mo-Containing Zeolite Catalysts with a Hierarchical Pore System","authors":"L Korobitsyna Lyudmila, N. Konstantin, V. Alexander","doi":"10.17516/1998-2836-0111","DOIUrl":"https://doi.org/10.17516/1998-2836-0111","url":null,"abstract":"Physicochemical and catalytic properties of 4.0% Mo/ZSM-5 catalysts manufactured on the basis of zeolites with a hierarchical pore system are investigated. The effect of the conditions of synthesis of zeolites with an additional mesoporous structure on their textural and acidic characteristics is studied. The structure and morphology of crystals of synthesized zeolites and catalysts produced from them are determined by the methods of X-ray diffraction analysis and high-resolution scanning transmission electron microscopy. It is shown that 4.0% Mo/ZSM-5 catalysts produced from zeolites with a mesoporous structure exhibit higher activity and stability in the course of methane dehydroaromatization.","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74748634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Thermal Transformations of Asphaltenes at a Temperature of 120 °C 沥青质在120°C温度下的热转化
IF 0.4
Journal of Siberian Federal University. Chemistry Pub Date : 2019-03-01 DOI: 10.17516/1998-2836-0110
S. Dmitry, S. Galina, K. Anatoly, G. Ras
{"title":"Thermal Transformations of Asphaltenes at a Temperature of 120 °C","authors":"S. Dmitry, S. Galina, K. Anatoly, G. Ras","doi":"10.17516/1998-2836-0110","DOIUrl":"https://doi.org/10.17516/1998-2836-0110","url":null,"abstract":"Thermolysis of asphaltenes from three heavy oils was carried out at a temperature of 120 °C in a current of N2 with the withdrawal of the resulting products from the reaction zone. Composition and structure analysis of thermolysis products showed, that at 120 °C petroleum afaltenes are subject to thermal destruction due to breaking of covalent bonds with the formation of gas, oils and resins, exceed 13 % by weight. It is established that the main directions of asphaltene thermal transformations during thermolysis are an increase aromaticity and decrease content of naphthenic and aliphatic carbon. The reactivity and thermal transformations intensity of asphaltene molecules depend on the number of reaction centers in them. Reaction centers represent a weak aliphatic heteroatomic C–Het and/or Het–Het bond, destabilized by electron acceptor functional groups and naphthenicaromatic structural blocks with a high content of heteroatoms. It is complex effect of destabilizing factors reduces the energy of breaking the C–Het and/or Het–Het bond and makes it possible for it to decompose at 120 °C.","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90634029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Study of Organosolv Lignins Using Gel Permeation Chromatography and Thermal Analysis 用凝胶渗透色谱和热分析研究有机溶质木质素
IF 0.4
Journal of Siberian Federal University. Chemistry Pub Date : 2019-03-01 DOI: 10.17516/1998-2836-0109
N Malyar Yuriy, I. Victor, S. Alexander, V. Alexander
{"title":"Study of Organosolv Lignins Using Gel Permeation Chromatography and Thermal Analysis","authors":"N Malyar Yuriy, I. Victor, S. Alexander, V. Alexander","doi":"10.17516/1998-2836-0109","DOIUrl":"https://doi.org/10.17516/1998-2836-0109","url":null,"abstract":"Organosolv delignification of wood in the lower alcohols media is one of the promising methods for lignocellulosic biomass processing. The organosolv lignins obtained do not contain sulfur and ash, and therefore are a promising raw material for processing into valuable chemical products. To study the structure of lignins, a large range of physicochemical methods is used. In this review, attention is focused on the methods of studying the structure and properties of organosolv lignins, which have recently been greatly developed – gel permeation chromatography and thermal analysis methods. Examples of the use of these methods to study the molecular mass characteristics of organosolv lignins and their thermochemical properties are considered.","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81740749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Synthesis of Hybrid Organo-Inorganic Materials Based on α-Ni(OH)2 α-Ni(OH)2基有机无机杂化材料的合成
IF 0.4
Journal of Siberian Federal University. Chemistry Pub Date : 2019-03-01 DOI: 10.17516/1998-2836-0106
Pikurova Elena V., Saikova Svetlana V., Chityakov Dmitry I., K. Irina V., Samoilo Alexander S.
{"title":"Synthesis of Hybrid Organo-Inorganic Materials Based on α-Ni(OH)2","authors":"Pikurova Elena V., Saikova Svetlana V., Chityakov Dmitry I., K. Irina V., Samoilo Alexander S.","doi":"10.17516/1998-2836-0106","DOIUrl":"https://doi.org/10.17516/1998-2836-0106","url":null,"abstract":"In the paper we present a method for producing hybrid organo-inorganic materials based on α-Ni(OH)2. This materials were synthesized by the anion resin exchange precipitation of nickel nitrate in the presence of sodium dodecyl sulfate or cetyltrimethylammonium bromide (CTAB) using the strong base anion exchange resin AB-17-8 in the OH-form as a precipitate agent. The as-obtained products were studied by methods X-ray diffraction, infrared spectroscopy, complex thermal analysis and TEM.","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85512874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Composition, Structure and Reduction Reactivity of Composite Materials of the α-Fe2O3–СaFe2O4 System by Hydrogen α-Fe2O3 -СaFe2O4体系复合材料的组成、结构及氢还原反应性
IF 0.4
Journal of Siberian Federal University. Chemistry Pub Date : 2019-03-01 DOI: 10.17516/1998-2836-0108
V. Vladimir, P. Nadezhda, N. Nina, V. Yuriy, M. Z. Anatoly, A. Leonid
{"title":"Composition, Structure and Reduction Reactivity of Composite Materials of the α-Fe2O3–СaFe2O4 System by Hydrogen","authors":"V. Vladimir, P. Nadezhda, N. Nina, V. Yuriy, M. Z. Anatoly, A. Leonid","doi":"10.17516/1998-2836-0108","DOIUrl":"https://doi.org/10.17516/1998-2836-0108","url":null,"abstract":"In this paper, α-Fe2O3–CaFe2O4 composite materials obtained by high-temperature solid-phase synthesis from Ca and Fe (III) oxides with varying molar ratio CaO/Fe2O3 in the range 0.15-1.00 were investigated. The materials are characterized by Х-ray diffraction (XRD), scanning electron microscopy with energy-dispersive X-ray microanalysis (SEM-EDS) and simultaneous thermal analysis (STA) in the hydrogen temperature-programmed reduction mode (H2-TPR). SEM-EDS studies of the specimens were revealed a formation of the “core-shell” type complex microstructure of material with the hematite phase as the “core”. H2-TPR of the specimens allowed to establish a decrease of the contribution of low-temperature forms of lattice oxygen in areas of 350-510 °С (up to 2.6 times) and 510-650 °С (up to 1.7 times), and the growth of the contribution of the high-temperature oxygen form in the range of 650-900 °С (up to 2 times) with an increase in the content of the phase CaFe2O4 from 33.4 to 97.5 wt. %. Relying on the assessment of lattice oxygen mobility, it was suggested, that the samples with content of CaFe2O4 phase more than 55.4 wt. % are promising for use as oxygen carriers in chemical looping processes of syngas production.","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78053470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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