Chemical Industry最新文献_第3页

Differential scanning calorimetry-based investigations of erythritol - sodium chloride phase change composites for thermal energy storage 基于差示扫描量热法的赤糖醇-氯化钠相变复合材料储热性能研究

Chemical Industry Pub Date : 2022-01-01 DOI: 10.2298/hemind210526003f

P. Felix, Velavan Rajagopal, Kannan Kumaresan

引用次数: 0

Development of an analytical model for copper heap leaching from secondary sulfides in chloride media in an industrial environment 工业环境下氯化物介质中二次硫化物堆浸铜分析模型的建立

Chemical Industry Pub Date : 2022-01-01 DOI: 10.2298/hemind220214015s

M. Saldaña, E. Salinas-Rodríguez, Jonathan Castillo, F. Peña-Graf, Francisca Roldán

引用次数: 0

Investigation of hazardous waste a case study of electric arc furnace dust characterization 危险废弃物的调查——以电弧炉粉尘表征为例

Chemical Industry Pub Date : 2022-01-01 DOI: 10.2298/hemind220609018t

V. Trifunovic, Snežana Milić, L. Avramović, R. Jonovic, V. Gardić, Stefan Djordjievski, S. Dimitrijević

{"title":"Investigation of hazardous waste a case study of electric arc furnace dust characterization","authors":"V. Trifunovic, Snežana Milić, L. Avramović, R. Jonovic, V. Gardić, Stefan Djordjievski, S. Dimitrijević","doi":"10.2298/hemind220609018t","DOIUrl":"https://doi.org/10.2298/hemind220609018t","url":null,"abstract":"Dust from an electric arc furnace is formed as the main by-product of the steel production process from the secondary iron-based raw materials. This dust has significant contents of Zn and Fe, as well as Pb, Cd, Ca, Mg, Cr, Mn, Si, Ni, Cu, F, Cl and other elements and is considered hazardous industrial solid waste since it contains heavy metals. In order to protect the environment and public health from the negative impact of this type of hazardous waste, it is necessary, even mandatory, to carry out its treatment in accordance with the legislation of the country where it is located. Before applying any treatment of the electric arc furnace (EAF) dust, it is necessary to perform its detailed characterization. In this paper, the following characterization of EAF dust originating in the Republic of Serbia was performed: physical-mechanical and chemical characterization, determination of granulometric composition, and mineralogical characterization. Also, the EAF dust impact on the environment and human health was assessed (Leachability and Toxicity Characteristic Leaching Procedure (TCLP) tests). The results have shown that the Zn content is in the range 32 to 35 % and that the main mineralogical phases of the dust are zincite, franklinite, magnetite, and magnesioferrite. Granulometric analysis has shown that 80 % of the sample consists of particles less than 26 ?m in size. According to the leaching test results, the EAF dust is characterized as a hazardous waste due to the increased chloride content, while the TCLP test indicated dust toxicity due to the increased contents of Zn, Cd, and Pb.","PeriodicalId":9933,"journal":{"name":"Chemical Industry","volume":"87 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89870451","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 electrohydrodynamic calculations 电流体力学计算的研究

Chemical Industry Pub Date : 2022-01-01 DOI: 10.2298/hemind211110010b

S. Bošković, A. Karac, S. Vrhovac, A. Belic, B. Bugarski

引用次数: 0

The effect of fibre morphology on packing phenomena and bed properties in coalescers 纤维形态对聚结剂中堆积现象和床层性能的影响

Chemical Industry Pub Date : 2022-01-01 DOI: 10.2298/hemind211224016k

M. Hadnadjev-Kostic, Dunja Sokolovic, S. Sokolovic, T. Laminger, Arpad Kiralj

引用次数: 0

Challenges and doubts of electrochemical energy conversion and storage 电化学能量转换与存储的挑战与质疑

Chemical Industry Pub Date : 2022-01-01 DOI: 10.2298/hemind220201002d

A. Dekanski

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Copper strip corrosion testing in hydrocracked base oil in the presence of different inhibitors 不同缓蚀剂在加氢裂化基础油中的腐蚀试验

Chemical Industry Pub Date : 2022-01-01 DOI: 10.2298/hemind220113012m

B. Malinovic, A. Borkovic, T. Djuričić

{"title":"Copper strip corrosion testing in hydrocracked base oil in the presence of different inhibitors","authors":"B. Malinovic, A. Borkovic, T. Djuričić","doi":"10.2298/hemind220113012m","DOIUrl":"https://doi.org/10.2298/hemind220113012m","url":null,"abstract":"In this paper, the corrosion test of copper in hydrocracked base oil HC-6 was performed in the presence of an additive for extremely high pressures (EP additive) in different concentrations. EP additives are used to reduce wear in industrial applications, under high load conditions. Since most of these additives are sulfur-based, whose compounds can be corrosive at high temperatures, their use leads to corrosion of some materials. To prevent corrosion in the base oil with the EP additive, three commercial corrosion inhibitors are added. By chemical composition, the inhibitor RC 8210 is a derivate of dimercaptothia-diazole, RC 4220 is a synthetic neutral calcium sulfonate, and IRGAMET 39 is a derivative of tolutriazole. Efficiency of the inhibitors was monitored by standard test methods for corrosiveness to copper arising from petroleum products by the copper strip test (ASTM D-130) and the gravimetric method, while oxidation stability of the base oil was monitored by peroxide number determination. Oxidation was performed at 100?1?C for 3 and 24 h. Results of these studies have shown that IRGAMET 39 is the most effective inhibitor in the presence of the EP additive at both examined oxidation times.","PeriodicalId":9933,"journal":{"name":"Chemical Industry","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88822886","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

Development and characterization of electrochemical sensors based on carbon modified with TiO2 nanoparticles 碳纳米TiO2修饰电化学传感器的研制与表征

Chemical Industry Pub Date : 2022-01-01 DOI: 10.2298/hemind220105013m

Saša Mićin, B. Malinovic, T. Djuričić

{"title":"Development and characterization of electrochemical sensors based on carbon modified with TiO2 nanoparticles","authors":"Saša Mićin, B. Malinovic, T. Djuričić","doi":"10.2298/hemind220105013m","DOIUrl":"https://doi.org/10.2298/hemind220105013m","url":null,"abstract":"The aim of this study is the development and characterization of a carbon-based electrochemical sensor, modified with TiO2 nanoparticles for potential application in electroanalytical techniques. The influence of binder and modifier contents on morphological, physicochemical and electrochemical characteristics of the electrode material was investigated in order to determine the optimal ratio of the carbon material/binder/modifier. Carbon pastes were prepared from mixtures containing graphite powder, TiO2 nanoparticles and liquid hydrocarbons. Scanning electron microscopy showed that the electrode material becomes more compact with the addition and the increase in the binder material content, while increasing the proportion of TiO2 nanoparticles did not have any significant effect on the material morphology showing fairly homogeneous nanoparticle distribution in the graphite electrode material. The test results indicate that the modified carbon paste with 40 vol.% paraffin oil (PO) and 6-8 wt.% TiO2 nanoparticles is characterized by the lowest value of specific resistance. By applying cyclic voltammetry, the most pronounced degree of reversibility was obtained in relation to the standard reversible redox system ([Fe (CN)]-3/-4) for the electrode material with 30-40 vol.% PO and 8-10 wt.% TiO2 nanoparticles. Characterization of the electrode material based on carbon modified with TiO2 nanoparticles indicated that the optimal composition contains 40 vol.% PO and 6-8 wt.% TiO2 nanoparticles, which is important for application in electroanalytical techniques.","PeriodicalId":9933,"journal":{"name":"Chemical Industry","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80450261","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

Desulphurisation of dibenzothiophene and 4,6–dimethyl dibenzothiophene via enhanced hydrogenation reaction route using RePd–TiO2/SiO2 aerogel catalysts: kinetic parameters estimation and modelling RePd-TiO2 /SiO2气凝胶催化剂强化加氢脱硫二苯并噻吩和4,6 -二甲基二苯并噻吩:动力学参数估计和建模

Chemical Industry Pub Date : 2022-01-01 DOI: 10.2298/hemind220114008p

Dragana Prokić-Vidojević, Sandra Glisic, Radojica Pešić, A. Orlović

{"title":"Desulphurisation of dibenzothiophene and 4,6–dimethyl dibenzothiophene via enhanced hydrogenation reaction route using RePd–TiO2/SiO2 aerogel catalysts: kinetic parameters estimation and modelling","authors":"Dragana Prokić-Vidojević, Sandra Glisic, Radojica Pešić, A. Orlović","doi":"10.2298/hemind220114008p","DOIUrl":"https://doi.org/10.2298/hemind220114008p","url":null,"abstract":"Re/Pd-TiO2/SiO2 aerogel catalysts were synthesized by using a sol-gel method and supercritical drying in excess solvent and investigated in the reaction of hydrodesulphurisation (HDS) of dibenzothiophene (DBT) and 4,6-dimethyl dibenzothiophene (4,6-DMDBT). Both Re/Pd catalysts, obtained with and without the use of mesitylene in the synthesis step, have shown increased conversions of up to 70 % in the desulphurization of 4,6-DMDBT, when compared to conventional Co/Mo hydroprocessing catalysts. This observation is of importance for conversion of highly refractory 4,6-DMDBT and hydroprocessing to produce ultra-low sulphur diesel fuels, ULSD. In order to quantify the extent of desulphurisation, which proceeds via a hydrogenation route, conversions of DBT and 4,6-DMDBT along with evolution of reaction products characteristic for the direct desulphurisation route and the hydrogenation route were monitored by using a gas chromatography?mass spectrometry (GC-MS) analytical technique. The reaction was performed at 630 K and 6 MPa in a batch catalytic reactor. The experimental results were used in the Hougen-Watson kinetic model describing DBT and 4,6-DMDBT desulphurisation on ? and ? active sites. Kinetic parameters of this complex catalytic kinetics were determined by using a Genetic Algorithm method and minimum deviation function. Values of calculated kinetic parameters and values of the ratio of 3-methylcyclohexyltoluene (MCHT and dimethyl biphenyl (DMBPH) expressed as the MCHT/(MCHT+DMBPH) ratio ranging between 0.66 and 0.94, have confirmed that the hydrogenation route is the dominant route for desulphurisation of 4,6-DMDBT.","PeriodicalId":9933,"journal":{"name":"Chemical Industry","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74699997","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

Effects of poly(diallyldimethylammonium chloride) addition on the curing kinetics of urea-formaldehyde adhesives for particleboards 添加聚二烯基二甲基氯化铵对刨花板用脲醛胶粘剂固化动力学的影响

Chemical Industry Pub Date : 2022-01-01 DOI: 10.2298/hemind210914001p

M. Popović, N. Vukić, Milanka Djiporović-Momčilović, J. Budinski-Simendic, Ivana Gavrilović-Grmuša, J. Popović, I. Ristić

{"title":"Effects of poly(diallyldimethylammonium chloride) addition on the curing kinetics of urea-formaldehyde adhesives for particleboards","authors":"M. Popović, N. Vukić, Milanka Djiporović-Momčilović, J. Budinski-Simendic, Ivana Gavrilović-Grmuša, J. Popović, I. Ristić","doi":"10.2298/hemind210914001p","DOIUrl":"https://doi.org/10.2298/hemind210914001p","url":null,"abstract":"Addition of poly(diallyldimethylammonium chloride) (PDDA) on the performances of urea-formaldehyde (UF) adhesives was evaluated in this work. Three types of UF adhesives were prepared, one without PDDA addition, and two types with PDDA addition of 1 and 3 wt.% per dry UF adhesive mass. These UF adhesive systems were used for producing experimental particleboard panels. The addition of PDDA decreased the thickness swelling of the panel samples, while the internal bond of the particleboards increased significantly only at the highest PDDA content (3 wt.%). Differential scanning calorimetry (DSC) was applied to address the influence of PDDA on UF adhesive curing kinetics. DSC scans were performed in non-isothermal regimes using different heating rates (5, 10, and 20 ?C?min?1). The activation energy (Ea) of the curing reaction showed slightly lower values for the UF adhesive systems containing PDDA. However, the peak temperatures and enthalpy of reaction did not change significantly. The Kissinger-Akahira-Sunose and Friedman iso-conversional methods were applied to investigate the effects of PDDA addition on the UF adhesive curing process.","PeriodicalId":9933,"journal":{"name":"Chemical Industry","volume":"75 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86370171","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