Hemijska Industrija最新文献_第8页

Decolorization of crystal violet over TiO2 and TiO2 doped with zirconia photocatalysts TiO2和掺杂氧化锆光催化剂的TiO2对结晶紫的脱色

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2017-07-26 DOI: 10.2298/HEMIND160521036V

M. Vasić, M. Randjelović, J. Mitrović, N. Stojković, B. Matović, A. Zarubica

引用次数: 2

Cracking caused by cutting of plasma-sprayed hydroxyapatite coatings and its relation to the structural features of coatings deposited at different initial substrate temperatures 等离子喷涂羟基磷灰石涂层的切割开裂及其与涂层结构特征的关系

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2017-07-26 DOI: 10.2298/HEMIND160513034G

B. Gligorijevic, M. Vilotijević, M. Šćepanović, Radovan V. Radovanović, N. Radović

{"title":"Cracking caused by cutting of plasma-sprayed hydroxyapatite coatings and its relation to the structural features of coatings deposited at different initial substrate temperatures","authors":"B. Gligorijevic, M. Vilotijević, M. Šćepanović, Radovan V. Radovanović, N. Radović","doi":"10.2298/HEMIND160513034G","DOIUrl":"https://doi.org/10.2298/HEMIND160513034G","url":null,"abstract":"The present study estimated the cracking phenomenon in as-plasma-sprayed hydroxylapatite coatings (HACs) after they were being subjected to the severe cutting conditions in the direction perpendicular to the coating/substrate interface. In order to evaluate the effects of substrate preheating on the occurrence of micro-cracks, the HACs were deposited at different initial substrate temperatures ( T S = 20, 100 and 200 °C). The changes in phase composition and HA splat morphology with T S were observed and were correlated with the cracking occurrence. The results showed that severe cutting conditions introduced a localized cracking in the regions of HACs dominantly attributed to the brittle hydroxyl-deficient amorphous calcium phosphate (ACP) phase. This effect was particularly observable in the HACs deposited without preheating of substrate. On the other hand, the preheating of substrate reduced the presence of micro-cracks and caused insignificant changes in the average local phase composition. In HACs deposited with preheating of substrate, the HA splats (of which HACs are composed) were thinner and recrystallized HA regions seemed smaller in size and more evenly distributed. These results implied potentially important roles of the HA splat formation mechanism on the distribution of ACP and recrystallized HA regions in the as-plasma-sprayed HACs and the cracking resistance of HACs.","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2017-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47260008","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

Modified approach to distillation column control 精馏塔控制的改进方法

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2017-07-26 DOI: 10.2298/HEMIND160326028P

Sanja Prodanović, N. Nedic, V. Filipovic, Ljubiša Dubonjić

{"title":"Modified approach to distillation column control","authors":"Sanja Prodanović, N. Nedic, V. Filipovic, Ljubiša Dubonjić","doi":"10.2298/HEMIND160326028P","DOIUrl":"https://doi.org/10.2298/HEMIND160326028P","url":null,"abstract":"This paper contains methodology research for forming the control algorithm for a distillation column, modeled as TITO (two-input two-output) process. Its modified form was obtained by connecting the two parts, and this combination hasn't been applied for such a industrial plant, until now. These parts include: a simplified decoupler which was first designed and decentralized PID controller obtained using D-decomposition method for such decoupled process. The decoupler was designed in order to make process become diagonal, and parameters of PID controllers are defined for the two SISO (single-input single-output) processes starting from relation between IE (integral error) criterion and integrator gain, taking into account desired response characteristics deriving from technological requirements of controlled plant. Their connecting provides centralized control. Analysis of the processes responses, obtained by the proposed algorithm and their comparison with the results from the literature, were performed after the completion of the simulations. The proposed approach to the centralized controller design, beside its simplicity of usage and flexibility in achieving diversity of process dynamic behavior, gives better response characteristics, in comparison with existing control algorithms for distillation column in the literature.","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2017-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42568269","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: 3

Recycling of LiCo0.59Mn0.26Ni0.15O2 cathodic material from spent Li-ion batteries by the method of the citrate gel combustion 柠檬酸凝胶燃烧法回收废旧锂离子电池中的LiCo0.59Mn0.26Ni0.15O2阴极材料

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2017-07-26 DOI: 10.2298/HEMIND160418031S

J. Sencanski, M. Vujković, Ivana Stojković, D. Majstorović, D. Bajuk-Bogdanović, Ferenc T. Pastor, S. Mentus

{"title":"Recycling of LiCo0.59Mn0.26Ni0.15O2 cathodic material from spent Li-ion batteries by the method of the citrate gel combustion","authors":"J. Sencanski, M. Vujković, Ivana Stojković, D. Majstorović, D. Bajuk-Bogdanović, Ferenc T. Pastor, S. Mentus","doi":"10.2298/HEMIND160418031S","DOIUrl":"https://doi.org/10.2298/HEMIND160418031S","url":null,"abstract":"Nekoliko istrosenih komercijalnih Li-jonskih baterija reciklirano je relativno brzim, ekonomicnim i jednostavnim postupkom. Posle mehanickog rastavljanja komponenti komercijalnih baterija sa Li(Co–Mn–Ni)O 2 kao katodnim materijalom, ispitana su tri nacina odvajanja katodnog materijala od Al kolektora: 1. rastvaranjem Al podloge u alkalnoj sredini, 2. ispiranje pomocu rastvaraca N -metilpirolidona i 3. termickim razaranjem veziva na 700 °C. U pogledu prinosa datog materijala postupak rastvaranja u alkalnoj sredini se pokazao kao najefikasniji. Hemijski sastav pojedinacnih komponenti baterija (kosuljice, Al/Cu kolektora, katodnog materijala,...) određen je atomskom apsorpcionom spektrometrijom, pri cemu su ispitivane komponente prethodno prevedene u stanje rastvora. Nakon odvajanja katodnog materijala i prevođenja u stanje nitratnog rastvora ponovo je izvrsena sinteza metodom sagorevanja citratnog gela. Dobijeni proizvod je, nakon žarenja na 750 °C, karakterisan metodama difrakcije X-zraka i ramanske spektroskopije. Dobijen je proizvod stehiometrijskog sastava LiCo 0,59 Mn 0,26 Ni 0,15 O 2 , heksagonalne slojevite strukture tipa α -NaFeO 2 . Funkcionalnost resintetisanog materijala ispitana je u 1 M rastvoru LiClO 4 u propilen-karbonatu, galvanostatskim punjenjem i pražnjenjem, pri gustini struje od 0,7 C. Reciklirani materijal pokazuje relativno dobre kapacitete punjenja i pražnjenja koji iznose 94,9 i 64,8 mA h g –1 , redom.","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2017-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42998656","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: 4

The use of Bacterial Indol-3-acetic acid (IAA) for reduce of chemical fertilizers doses 细菌吲哚-3-乙酸(IAA)用于减少化肥用量

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2017-07-26 DOI: 10.2298/HEMIND160317029D

S. Đorđević, D. Stanojević, M. Vidović, Violeta Mandić, I. Trajković

{"title":"The use of Bacterial Indol-3-acetic acid (IAA) for reduce of chemical fertilizers doses","authors":"S. Đorđević, D. Stanojević, M. Vidović, Violeta Mandić, I. Trajković","doi":"10.2298/HEMIND160317029D","DOIUrl":"https://doi.org/10.2298/HEMIND160317029D","url":null,"abstract":"The standard technology of seed processing uses mainly chemical products . Recent researches showed that toxic materials from chemical fertilizers can be harmful to humans, animals and the environment. Currently the attention of researches is shifting away from chemical fertlizers and toward alternative that consumers perceive to be natural, Plant Growth Promoting bacteria (PGP). PGP bacteria could be a way to reduce chemical fertilizer doses . This was the reason to test the ability of Bacillus megaterium , Azotobacter chroococcum to produce hormone auxin (IAA). Bacterial strains were identified by PCR amplification and sequencing of the 16S rRNA gene. Indole-3-acetic acid (IAA) was detected and quantified by MRM experiment. This study conducted that maize seed inoculation with IAA from species mentioned above showed positive effects. They had statistically significantly higher root and steam height compared to control seedlings. Bacterial strains tested in this study may be recommended as PGP (Plant Growth Promoting) bacteria, due to their positive effects and eventually can be used to reduce chemical fertilizers doses.","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2017-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48234265","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: 4

The influence of migration processes in gunpowder charge on the quality of mortar ammunition 火药装药迁移过程对迫击炮弹质量的影响

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2017-07-26 DOI: 10.2298/HEMIND160414033B

Nikola Bobić, R. Simonović, S. Drmanic, Stefan Z. Milić, J. Nikolic, S. Stoiljković, Nebojša S. Terzić

引用次数: 3

Experimental and numerical study of globe valve housing 截止阀壳体的试验与数值研究

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2017-07-26 DOI: 10.2298/HEMIND160516035M

N. Mitrović, A. Petrovic, M. Milosevic, N. Momčilović, Ž. Mišković, T. Maneski, P. Popović

{"title":"Experimental and numerical study of globe valve housing","authors":"N. Mitrović, A. Petrovic, M. Milosevic, N. Momčilović, Ž. Mišković, T. Maneski, P. Popović","doi":"10.2298/HEMIND160516035M","DOIUrl":"https://doi.org/10.2298/HEMIND160516035M","url":null,"abstract":"Complex structure experimental analysis has always been a huge challenge for researchers. Conventional experimental methods ( e.g ., strain gauges) give only limited data sets regarding measurement on critical areas with high geometrical discontinuities. A 3D Digital Image Correlation method is an optical method that overcomes the limitations of conventional methods and enables full-field displacement and strain measurement of geometrically complex structures. System Aramis, based on Digital Image Correlation method, is used for experimental analysis and numerical model verification in this paper. Investigated complex structure is sphere/cylinder junction on globe valve housing subjected to axial loading. The highest experimentally measured von Mises strain values around 0.15% are recorded on cylinder/sphere intersection. Von Mises strain values on cylindrical and spherical part are several times smaller than on intersection itself. It is important to emphasize that, to the authors’ best knowledge, this is the first paper showing experimental results of 3D full and strain field of geometrically complex structure (sphere/cylinder intersection) on the intersection itself on pressure equipment. It is proven that 3D Digital Image Correlation method is fast and versatile method for recording strain during loading of complex structures.","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2017-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43667862","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: 13

Influence of 24-epibrassinolide on seedling growth and distribution of mineral elements in two maize hybrids 24-表油菜素内酯对两个玉米杂交种幼苗生长及矿质元素分布的影响

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2017-07-26 DOI: 10.2298/HEMIND160318030W

K. H. Waisi, Z. Petković, R. Nikolic, Z. Jankovic, B. Raicević, T. B. Lalevic, S. Z. Giba

{"title":"Influence of 24-epibrassinolide on seedling growth and distribution of mineral elements in two maize hybrids","authors":"K. H. Waisi, Z. Petković, R. Nikolic, Z. Jankovic, B. Raicević, T. B. Lalevic, S. Z. Giba","doi":"10.2298/HEMIND160318030W","DOIUrl":"https://doi.org/10.2298/HEMIND160318030W","url":null,"abstract":"In this study, influence of wide range of 24-epibrassinolide (24-EBL) on early growth potential of two maize hybrids (ZP 434 and ZP 704) was examined. Paper concerns germination, seedling biomass, important chlorophylls content, and redistribution of elements (heavy metals and microelements), in a seedlings of the maize hybrids, as influenced by different 24-EBL concentrations. It was found that hybrids react differently to exogenously applied hormone. The biggest differences between two examined maize hybrids considering the germination level were reached with the lowest values at 86% for ZP 704 and 72% for ZP 434, gained at the highest applied concentration of 24-EBL. Seedlings of hybrid ZP 434 reacted positively moderately in the case of shoot length and biomass under the influence of 24-EBL, but seedlings of hybrid ZP 704 had lower values of these parameters under the influence of the phytohormone. Chlorophyll a/b ratios showed that photosynthetic apparatus of seedlings of the hybrids is not active in this stage of development. It was established that 24-EBL affects seedling growth and re-allocation of naturally present mineral elements in early growth stages and that could be one of the reason for poorer growth of ZP 704 treated with various concentrations of 24-EBL, comparing to control. When applied in lower concentrations, 24-EBL is blocking toxic elements such as chromium and nickel to relocate to vital parts of plant, what was case in hybrid ZP704. In case of ZP 434, lower concentrations of 24-EBL are affecting re-allocation of Cu and Cr and these findings suggest that maize hybrid seedlings treated with lower concentrations of 24-EBL could survive and be successful in polluted areas.","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2017-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41819069","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: 11

Iron based metal organic framework as an effective lead ions remover from aqueous solution: Thermodynamic and kinetics studies 铁基金属有机骨架作为水溶液中有效的铅离子去除剂:热力学和动力学研究

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2017-07-26 DOI: 10.2298/HEMIND160120032S

N. D. Shooto, E. Dikio, D. Wankasi, L. Sikhwivhilu

引用次数: 13

Analysis of the treatment of plastic from electrical and electronic waste in the Republic of Serbia and the testing of the recycling potential of non-metallic fractions of printed circuit boards 分析塞尔维亚共和国电气和电子废物中塑料的处理情况，并测试印刷电路板非金属部分的回收潜力

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2017-06-30 DOI: 10.2298/HEMIND160415037V

Aleksandra S. Vučinić, Ž. Kamberović, M. Ranitović, T. Kovačević, Irena D. Najčević

{"title":"Analysis of the treatment of plastic from electrical and electronic waste in the Republic of Serbia and the testing of the recycling potential of non-metallic fractions of printed circuit boards","authors":"Aleksandra S. Vučinić, Ž. Kamberović, M. Ranitović, T. Kovačević, Irena D. Najčević","doi":"10.2298/HEMIND160415037V","DOIUrl":"https://doi.org/10.2298/HEMIND160415037V","url":null,"abstract":"U ovom radu prikazana je analiza kolicina plastike i stampanih ploca iz elektricnog i elektronskog otpada (e-otpad) u Republici Srbiji, kao i predlog postupka reciklaže granulata nemetalicne frakcije stampane ploce. Cilj rada je analiza reciklata stampanih ploca, kao i mogucnost primene. Podaci o kolicinama i nacinu postupanja sa plastikom i stampanim plocama, dobijeni su putem upitnika koji su poslati operaterima koji tretiraju pomenuti otpad. Rezultati analize upitnika su pokazali da je u 2014. godini rasklapanjem e-otpada izdvojeno 1.870,95 t plastike i 499,85 t stampanih ploca. Za ispitivanje reciklažnog potencijala koriscen je granulat stampanih ploca dobijen nakon mehanickog predtretmana i selektivnog izdvajanja metala hidrometalurskim postupcima. Karakterizacija granulata sprovedena je kroz ispitivanje granulometrijskog i hemijskog sastava predmetnog materijala za svaku izdvojenu frakciju. Potom je izvrsena manuelna klasifikacija razlicitih tipova polimernih materijala sadržanih u granulatu, kao i određivanje prividne specificne težine i hemijskog sastava klasifikovanih tipova polimernih materijala. Hemijski sastav granulata određen je metodom fluorescencije X-zracima (XRF), dok je identifikacija zaostalih polimernih materijala određena FTIR (Fourier Transform Infrared Spectroscopy) metodom. Na osnovu ovog istraživanja, može se zakljuciti da nemetalicna frakcija ima upotrebnu vrednost za dobijanje novih polimernih materijala za tehnicku upotrebu, sto je predmet mnogih istraživanja pomenutih i u ovom radu.","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2017-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47176975","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