Chemistry for Sustainable Development最新文献_第2页

THERMAL STABILITY OF THE OXIDATION PRODUCTS OF VACUUM GAS OIL 真空瓦斯油氧化产物的热稳定性

IF 0.4

Chemistry for Sustainable Development Pub Date : 2024-06-14 DOI: 10.15372/csd2024549

A. SVIRIDENKO YU, B. KRIVTSOV E, N. SVIRIDENKO N

{"title":"THERMAL STABILITY OF THE OXIDATION PRODUCTS OF VACUUM GAS OIL","authors":" A. SVIRIDENKO YU, B. KRIVTSOV E, N. SVIRIDENKO N","doi":"10.15372/csd2024549","DOIUrl":"https://doi.org/10.15372/csd2024549","url":null,"abstract":"An approach including preliminary oxidation of vacuum gas oil, chromatographic separation of oxidation products, and thermal treatment is considered. Analysis of the products formed in the cracking of polar and non-polar components of vacuum gas oil oxidised with a mixture of hydrogen peroxide and formic acid is described. It has been established that heat treatment of non-polar components allows obtaining up to 85 wt% distillate fractions boiling up to 360 °C, with sulphur content less than 0.3 wt%. The heat treatment of polar components leads to the formation of distillate fractions at a level of about 50 wt%, and sulphur removal reaches 50 %. It has been shown that the cracking temperature of polar oxidation products determines the route of sulphur removal: at a temperature of 450 °C, sulphur-containing fragments are accumulated in coke, while at 500 °C they are predominantly subjected to destruction with the formation of gas components. It has been determined that gaseous products formed in the heat treatment of both polar and non-polar components of oxidised vacuum gas oil mainly consist of saturated hydrocarbons of the C1-C3 series and carbon dioxide. The advantage of separate cracking of polar and non-polar components is elimination of undesired effect on the products formed in thermal decomposition of these components on the route of reactions proceeding in the system. The products obtained in this way are characterized by higher quality. In addition, variation of cracking conditions for separate components of oxidized vacuum gas oil makes it possible to regulate the depth of components destruction and, accordingly, the material balance of the process as a whole.","PeriodicalId":44968,"journal":{"name":"Chemistry for Sustainable Development","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141342733","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

COMBINED OXIDATION OF GASEOUS AND LIQUID ALKANES IN THE BARRIER DISCHARGE PLASMA 气态和液态烷烃在阻挡放电等离子体中的联合氧化

IF 0.4

Chemistry for Sustainable Development Pub Date : 2024-06-14 DOI: 10.15372/csd2024548

. RYABOV A, V. KUDRYASHOV S, N. OCHEREDKO A

{"title":"COMBINED OXIDATION OF GASEOUS AND LIQUID ALKANES IN THE BARRIER DISCHARGE PLASMA","authors":" . RYABOV A, V. KUDRYASHOV S, N. OCHEREDKO A","doi":"10.15372/csd2024548","DOIUrl":"https://doi.org/10.15372/csd2024548","url":null,"abstract":"The combined oxidation of gaseous (propane, butane) and liquid (heptane, octane, nonane and decane) alkanes in a barrier discharge plasma in oxygen has been studied. Oxidation process involves simultaneous conversion of gaseous and liquid hydrocarbons. Various C1-C4 hydrocarbon gases and mainly oxygenated compounds corresponding to hydroxyl and carbonyl compounds with the same number of carbon atoms in molecules as in the initial alkanes were detected among reaction products. At the stage of chemical reaction initiation in a barrier discharge, the electrons in the discharge interact with all the molecules of the initial mixture to form atomic oxygen and various hydrocarbon radicals. Their subsequent transformation leads to the formation of peroxide radicals of the corresponding alkanes, and their disproportionation leads to the formation of hydroxyl and carbonyl compounds. The mechanism of gaseous alkane oxidation is generally comparable to the mechanism of liquid hydrocarbon oxidation in a barrier discharge, and the key role in the mechanism of alkane co-oxidation is played by the interaction of atomic oxygen with a gaseous or liquid alkane. A probable mechanism for the combined oxidation of gaseous and liquid alkanes in a barrier discharge is proposed on the basis of experimental and literature data, and a simple equation is deduced, linking the rates of atomic oxygen interaction with alkane molecules to hydrocarbon concentrations in the gas phase of the discharge gas in the reactor. Applying the obtained equation, it is possible to estimate the direction of the oxidation of gaseous and liquid alkane mixtures and to involve the experimental data in calculating yet unknown rate constants of atomic oxygen interaction with alkane molecules. The results obtained make it possible to optimise the experimental conditions for the oxidation of gaseous and liquid alkane mixtures with the predominant oxidation of a gaseous alkane. These data will be useful in developing effective methods for the direct processing of a broad fraction of light hydrocarbons.","PeriodicalId":44968,"journal":{"name":"Chemistry for Sustainable Development","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141338416","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

INVESTIGATION OF THE PHYSICOCHEMICAL AND CATALYTIC PROPERTIES OF MFI TYPE ZEOLITES SYNTHESIZED USING DEEP EUTECTIC SOLVENT 利用深共晶溶剂合成的 mfi 型沸石的物理化学和催化特性研究

IF 0.4

Chemistry for Sustainable Development Pub Date : 2024-06-14 DOI: 10.15372/csd2024550

A. STEPANOV A, M. VELICHKINA L, L. KOROBITSYNA L, K. ALTUNINA L

{"title":"INVESTIGATION OF THE PHYSICOCHEMICAL AND CATALYTIC PROPERTIES OF MFI TYPE ZEOLITES SYNTHESIZED USING DEEP EUTECTIC SOLVENT","authors":" A. STEPANOV A, M. VELICHKINA L, L. KOROBITSYNA L, K. ALTUNINA L","doi":"10.15372/csd2024550","DOIUrl":"https://doi.org/10.15372/csd2024550","url":null,"abstract":"Zeolites of the structural type ZSM-5 were synthesized using a template, which was pentaerythritol (PER), carbamide (CA), or a deep eutectic solvent (DES) - a binary mixture of PER and CA. It is determined by IR spectroscopy and X-ray diffraction analysis that the nature of the templates used in the synthesis of zeolites affects the phase purity and the degree of crystallinity of the obtained samples. The textural and acidic properties of zeolites and Mo-containing catalysts prepared from them by dry mechanical mixing with nanoscale molybdenum powder have been studied. It is shown that the textural properties of zeolites depend on the template nature. The use of CA promoted obtaining the zeolite with maximal specific surface area and pore volume. The strength of the acid centres of unmodified samples, depending on the structure-forming additive, decreases in the series: DES > CA > PER, and the concentration of acid centres of both types, on the contrary, decreases for zeolites in the series: PER > CA > DES. The catalytic activity of synthesized zeolites has been studied in the processes of non-oxidative methane conversion and refining of the straight-run gasoline fraction of oil. The dependence of the activity and stability of samples on their physicochemical properties caused by the template nature is determined. It has been shown that zeolite synthesized using DES and the 4.0%Mo/ZSM-5 catalyst obtained on its basis exhibit higher activity and stability in the processes of non-oxidative methane conversion into aromatic hydrocarbons and in upgrading the straight-run gasoline fraction of oil, in comparison with zeolite-based catalysts obtained using PER or CA.","PeriodicalId":44968,"journal":{"name":"Chemistry for Sustainable Development","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141341666","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

APPLICATION OF GREEN CHEMISTRY PRINCIPLES FOR THE DEVELOPMENT OF SOLID COMMERCIAL FORMS OF OIL-DISPLACING COMPOSITIONS 应用绿色化学原理开发固体商业形式的石油置换成分

IF 0.4

Chemistry for Sustainable Development Pub Date : 2024-06-14 DOI: 10.15372/csd2024538

K. ALTUNINA L, A. KUVSHINOV V, A. STASYEVA L, V. KUVSHINOV I

引用次数: 0

UTILIZATION OF CALCINED SORBENT FROM ASH-AND-SLAG WASTE FROM THERMAL POWER ENGINEERING PLANTS FOR WASTEWATER TREATMENT 利用火力发电厂灰渣废料中的煅烧吸附剂处理废水

IF 0.4

Chemistry for Sustainable Development Pub Date : 2024-06-14 DOI: 10.15372/csd2024554

G. KOROTKOVA T, M. ZAKOLYUKINA A, I. DEMIN V

{"title":"UTILIZATION OF CALCINED SORBENT FROM ASH-AND-SLAG WASTE FROM THERMAL POWER ENGINEERING PLANTS FOR WASTEWATER TREATMENT","authors":" G. KOROTKOVA T, M. ZAKOLYUKINA A, I. DEMIN V","doi":"10.15372/csd2024554","DOIUrl":"https://doi.org/10.15372/csd2024554","url":null,"abstract":"The discharge of untreated or insufficiently treated sewage into water bodies leads to their pollution, contributing to the emergence and spread of viruses and bacteria that have a negative impact on the ecosystem. One of the indicators of water contamination by pathogenic microorganisms is ammonium ions. The sorption method based on industrial waste as sorbent precursors has become widespread for treating wastewater from ammonium ions. The article presents the results of studies of a calcined sorbent based on ash-and-slag wastes from thermal power engineering plants for the treatment of real wastewater, discharged into the Kuban river within the city of Krasnodar, to remove ammonium ions (NH4+ concentration 21 mg/dm3). The effect of sorption time (10, 30, 60, 90, 150, and 180 min) and sorbent dose (0.5, 1, 2, 3, and 5 g) on treatment efficiency is investigated. The experimental data are processed on the basis of kinetic equations. It is shown that the equation of the pseudo-first-order (Lagergren) provides the best description of experimental data on sorption in comparison with the pseudo-second-order equation (Ho and McKay) and the Elovich equation. It has been established that internal diffusion adsorption is the limiting stage. Treatment efficiency was 72.8 % at a sorbent dose of 5 g for solution volume 50 cm3 and sorption time 180 min. It is shown that the sorbent dose affects the time within which the phase equilibrium between the solution and calcined sorbent is established. The larger is sorbent dose, the larger number of adsorption centres are occupied by ammonium ions per unit time, so, for the fixed ammonium ion concentration in initial solution, shorter sorption time will be necessary to achieve equilibrium. For real wastewater, the time necessary for equilibrium to be achieved exceeds the value determined experimentally with the model mixtures using small sorbent doses. Reasonability of the application of calcined sorbent for treatment of real wastewater is confirmed.","PeriodicalId":44968,"journal":{"name":"Chemistry for Sustainable Development","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141342343","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

THE INFLUENCE OF POSTSYNTHETIC ALKALINE TREATMENT AND MODIFICATION WITH NICKEL NANOPOWDER ON THE PROPERTIES OF A ZEOLITE CATALYST FOR GASOLINE UPGRADING 后合成碱处理和纳米镍粉改性对汽油提纯沸石催化剂性能的影响

IF 0.4

Chemistry for Sustainable Development Pub Date : 2024-06-14 DOI: 10.15372/csd2024539

M. VELICHKINA L, E. BARBASHIN YA

{"title":"THE INFLUENCE OF POSTSYNTHETIC ALKALINE TREATMENT AND MODIFICATION WITH NICKEL NANOPOWDER ON THE PROPERTIES OF A ZEOLITE CATALYST FOR GASOLINE UPGRADING","authors":" M. VELICHKINA L, E. BARBASHIN YA","doi":"10.15372/csd2024539","DOIUrl":"https://doi.org/10.15372/csd2024539","url":null,"abstract":"Postsynthetic treatment of ZSM-5 zeolite with an aqueous solution of NaOH was carried out, followed by the modification of the treated zeolite with nanosized nickel powder. Nickel powder is introduced into the zeolite by dry mechanical mixing. The textural, acidic and catalytic properties of the original ZSM-5 zeolite and zeolite-based samples after alkaline treatment and modification are studied. The catalytic activity of zeolites has been studied in the process of conversion of straight-run gasoline fraction of oil. Along with determining the characteristics of the target reaction products - high-octane gasolines, an analysis of the resulting gaseous hydrocarbons and carbon compaction products (coke) was carried out. It has been established that alkaline treatment of zeolite and its subsequent mixing with nickel nanopowder leads to a decrease in the total specific surface area and total specific pore volume, a decrease in the concentration of acid sites and an increase in their strength. The enhancement of the combined effect of alkaline treatment and modification with nickel nanopowder on the textural and acidic properties of zeolite catalysts was determined. It has been shown that modification of zeolite catalysts has almost no effect on the composition of gaseous products formed in the conversion of straight-run gasoline fraction of oil. Post-synthetic alkaline treatment of ZSM-5 zeolite significantly reduces its aromatising and cracking activity, resulting in an increased yield of high-octane gasoline with improved environmental characteristics. The introduction of nickel nanopowder into alkali-treated zeolite enhances this trend, although not significantly. On modified zeolites, the amount of carbon compaction products is reduced, which will increase the time of stable operation of the resulting catalysts and improve the conditions for their regeneration.","PeriodicalId":44968,"journal":{"name":"Chemistry for Sustainable Development","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141344695","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 THE RHEOLOGICAL PROPERTIES OF HYDROGELS AND CRYOGELS OBTAINED USING THE AQUEOUS SOLUTIONS OF POLYVINYL ALCOHOL 研究使用聚乙烯醇水溶液获得的水凝胶和低温凝胶的流变特性

IF 0.4

Chemistry for Sustainable Development Pub Date : 2024-06-14 DOI: 10.15372/csd2024551

S. FUFAEVA M, N. MANZHAY V, S. KOZHEVNIKOV I

{"title":"STUDY OF THE RHEOLOGICAL PROPERTIES OF HYDROGELS AND CRYOGELS OBTAINED USING THE AQUEOUS SOLUTIONS OF POLYVINYL ALCOHOL","authors":" S. FUFAEVA M, N. MANZHAY V, S. KOZHEVNIKOV I","doi":"10.15372/csd2024551","DOIUrl":"https://doi.org/10.15372/csd2024551","url":null,"abstract":"The methods for producing cryogels and hydrogels from viscous aqueous solutions of polyvinyl alcohol (PVA) and their rheological properties are considered. Freezing an aqueous solution of polyvinyl alcohol, its exposure to negative temperature and subsequent thawing at a positive temperature lead to the formation of elastic cryogels. Chemical cross-linking of individual PVA molecules into spatial networks is accompanied by the transformation of aqueous solutions into hydrogels. Sodium tetraborate and glyoxal were used to structurise the polymer solutions. It has been determined that the interaction of these reagents with the functional groups of the polymer causes an increase in the viscosity of three-component systems “PVA - glyoxal - water” and “PVA - sodium tetraborate - water” with time. The kinetics of gel formation in the products of chemical reactions was investigated at different concentrations. It is shown that the viscosity of the studied systems increases with an increase in the concentrations of low-molecular reagents in both cases (PVA - glyoxal and PVA - sodium tetraborate). Hydrogels formed at a positive temperature were subjected to additional freezing-thawing cycle, cryogels were obtained, and their rheological properties were studied. The elastic properties of cryogels were determined to be more clearly pronounced than those of hydrogels. Hydrogels can be used as instantaneous gel-forming systems to protect from dangerous chemicals and to make waterproof barriers in hydraulic structures, as the elastic properties are enhanced after cryogenic exposure.","PeriodicalId":44968,"journal":{"name":"Chemistry for Sustainable Development","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141340087","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

ANALYSIS OF THE ECOLOGICAL STATE OF OIL-PRODUCING TERRITORIES IN WEST SIBERIA USING MODIS SATELLITE DATA 利用莫迪斯卫星数据分析西伯利亚西部产油地区的生态状况

IF 0.4

Chemistry for Sustainable Development Pub Date : 2024-06-14 DOI: 10.15372/csd2024546

O. PEREMITINA T, G. YASHCHENKO I

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БИОКОСМОЛОГИЧЕСКИЙ РАЗВОРОТ, СООБРАЗУЯСЬ С ПОРАЗИТЕЛЬНЫМ СООТВЕТСТВИЕМ (В ОТНОШЕНИИ К РОССИЙСКОЙ ЦИВИЛИЗАЦИИ) - ВЫВОДОВ ТЕОРИИ Н.Я. ДАНИЛЕВСКОГО (150 ЛЕТ НАЗАД) И ТЕКУЩЕГО МОМЕНТА В МИРОВОЙ ИСТОРИИ (СОЦИОКУЛЬТУРНОЙ ЭВОЛЮЦИИ) 生物学说的转变与俄罗斯文明的惊人一致——公元前150年丹尼尔斯基的结论和当今世界历史(社会文化进化)

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Chemistry for Sustainable Development Pub Date : 2023-03-19 DOI: 10.46865/978-5-901640-39-5-2023-320-327

Константин Станиславович Хруцкий

引用次数: 0

ЗНАЧЕНИЕ ДИСЦИПЛИНЫ «ЦИФРОВАЯ ЭКОНОМИКА» ДЛЯ ЦИФРОВОЙ ГРАМОТНОСТИ СТУДЕНТОВ 数字经济学科对学生数字识字率的重要性

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Chemistry for Sustainable Development Pub Date : 2023-03-19 DOI: 10.46865/978-5-901640-39-5-2023-343-347

Тамара Николаевна Юдина

引用次数: 0