TR-Dizin İndeksli Yayınlar Koleksiyonu
Permanent URI for this collectionhttps://hdl.handle.net/20.500.12573/396
Browse
4 results
Search Results
Article Türk Termik Santrallerinden İki Farklı Uçucu Kül Kullanarak Alkali Yakma Metoduyla Zeolit Sentezi(2020) Top, Soner; Vapur, HuseyinBu çalışmada, Sugözü termik santrali uçucu küllerinden sonrasında su liçi ile desteklenen bazik füzyon tekniği kullanılarak fojasit (Na-LSX) (3.5(Ca0.3)3.5(Na0.6)3.5(Mg0.1)Al7Si17O48•32(H2O)) türü, Çatalağzı uçucu küllerinden ise aynı tekniği kullanarak Ca-Filipsit (CaK0.6Na0.4Si5.2Al2.8O16•6(H2O)) türü zeolitler sentezlenmiştir. Bu yöntemlerde öncelikle yüksek sıcaklıkta kül fırınında uçucu küller ve sodyum hidroksit (NaOH) belirli oranlarda karıştırılarak 600 °C’de sinterlenmiş sonrasında öğütülen malzemelerden saf suda liç işlemi ile zeolitler elde edilmiştir. Katyon Değiştirme Kapasitesi (KDK), X-Işını Kırınımı (XRD), Taramalı Elektron Mikroskobu (SEM), Fourier Dönüşümlü Kızılötesi Spektroskopisi (FTIR), X-Işını Fluoresans (XRF) ve Atomik Adsorpsiyon Spektrometresi (AAS) analizleri ile sentezlenen zeolitler karakterize edilmiştir. Sugözü uçucu külleri ile (1:2 oranda) sentezlenen zeolitler 136,93 meq/100 g KDK’ne sahipken aynı oranda Çatalağzı uçucu külleri ile sentezlenen zeolitlerin 247,88 meq/100 g KDK’ne sahip oldukları belirlenmiştir. Sonuç olarak F sınıfı 2 ayrı uçucu kül kullanarak atıksu arıtıcı, enerji depolayıcı, katalist ve separator olarak kullanılabilecek zeolitler sentezlenmiştir.Article Investigation on Usage Possibilities of Gasification Plant Wood Waste and Sivas Kangal Lignite Coal in Dye Adsorption(2020) Top, Soner; Kırma, Ramazan; Uçkun, Şükrü; Sarıkaya, Musa; Timür, İrfanIn this study, the usage possibilities of wood waste obtained from Gebze MDF and ParticleBoard Gasification Plant preliminary studies and Sivas Kangal lignite coal as absorbents wereinvestigated. In this way, it was aimed both to evaluate the wastes and to prevent environmentalpollution with materials that are cheaper and easier to obtain. The structure and surface propertiesof wood waste and coal samples crushed and ground to -75 µm size and used as adsorbent wereinvestigated by XRD, SEM and BET analyses. In addition, samples have been characterized byelemental, ash, moisture, volatile matter and fixed carbon analyses. In the experiments, methyleneblue (MM) with the formulation of C16H18CIN3 S.xH2 O was used. The effects of temperature, mixingtime and concentration parameters on MM adsorption were investigated. Langmuir isotherms werecreated for different temperatures at optimum concentrations. As a result, it has been revealed thatlignite coal and wood waste can be used as adsorbent. A 10 ppm MM for lignite coal and 3 ppmMM for wood waste were determined to be ideal concentrations for adsorption.Article Citation - Scopus: 2Zeolite Synthesis by Alkali Fusion Method Using Two Different Fly Ashes Derived From Turkish Thermal Power Plants(Chamber of Mining Engineers of Turkey, 2020-03-01) Top, S.; Vapur, HüseyinIn this study, Faujasite (Na-LSX) (3.5(Ca0.3)3.5(Na0.6)3.5(Mg0.1)Al7Si17O48 32(H2O)) type zeolites and Ca-Filipsite (CaK0.6Na0.4Si5.2Al2.8O16 6(H2O)) type zeolites were produced from Sugözü Thermal Power Plant and Çatalaǧzi Thermal Power Plant fly ashes by alkali fusion method followed by water leaching, respectively. In these methods, fly ashes and sodium hydroxide (NaOH) were mixed in certain proportions and sintered at 600°C in ash furnace. Then, zeolites were obtained from the ground materials after water leaching and solid/liquid separation, respectively. Cation Exchange Capacity (CEC), X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Fourier-Transform Infrared Spectroscopy (FTIR), X-Ray Fluorescence (XRF) and Atomic Absorption Spectrometer (AAS) analyses were used to characterize the synthesized zeolites. The zeolites synthesized with Sugözü fly ashes in a ratio of 1:2 had 136.93 meq/100 g CEC, whereas the CEC of synthesized zeolite from Çatalaǧzi fly ashes was found to be 247.88 meq/100 g. As a result, zeolites, which can be used as wastewater treatment agent, energy storage material, catalyst and separator, were synthesized by using 2 different Class F fly ash. © 2023 Elsevier B.V., All rights reserved.Article Manganzı Demir Cevherinden Manganın Çözündürülmesinde Farklı İndirgeme Maddelerinin Etkisi(Chamber of Mining Engineers of Turkey, 2022-06-26) Top, S.; Altiner, Mahmut; Kursunoglu, SaitIIn this paper, the manganese extraction from a manganiferous iron ore was investigated using reductive leaching. Various chemicals were used as a reducing agent to leach manganese selectively from the ore in the presence of sulfuric acid (H2SO4) solution. Firstly, optimum dissolution values were determined for selective manganese dissolution without using a reducing agent. As it was aimed at the selective extraction of manganese from the ore, the reductive leaching tests were conducted by adding the reducing agents under the following optimal parameters: a leaching time of 1 h, a stirring speed of 300 rpm, a temperature of 70°C, a sulfuric acid concentration of 1 M where the ore was leached with an extraction ratio of 11.54% Mn and 2.16% Fe. Manganese was dissolved with high efficiencies (up to 97.46%) from the ore by using different organic compounds (tartaric acid (C<inf>4</inf>H<inf>6</inf>O<inf>6</inf>), oxalic acid (C<inf>2</inf>H<inf>2</inf>O<inf>4</inf>), citric acid (C<inf>6</inf>H<inf>8</inf>O<inf>7</inf>), glucose (C<inf>6</inf>H<inf>12</inf>O<inf>6</inf>), sucrose (C<inf>12</inf>H<inf>22</inf>O<inf>11</inf>), and maleic acid (C<inf>4</inf>H<inf>4</inf>O<inf>4</inf>)) as the reducing agents. © 2022 Elsevier B.V., All rights reserved.