• Sustainability analysis of a solar driven hydrogen production system using exergy, extended exergy, and thermo-ecological methods: Proposing and comparing of new indices 

  Erzen, Sevgi; Ünal, Canberk; Açıkkalp, Emin; Hepbaşlı, Arif (Pergamon-Elsevier Science, 2021)

  This paper aims at investigating and comparing some sustainability indices in the literature while proposing some new indices. A solar driven hybrid system made of a PV cell, an alkaline electrolyzer and a PEM fuel cell ...

• Energy consumption, mechanical and metallographic properties of cryogenically treated tool steels 

  Savaş, Ahmet Fevzi; Öktem, Hasan; Öztürk, Burak; Uğur, İlyas; Küçük, Özkan (De Gruyter, 2023)

  This article examines energy consumption, microstructure, mechanical properties, and the change in the wear amount during the machining of GGG-42 cast iron material with two types of guide cutting tool produced by ...

• Activated carbon from paulownia wood Yields ofchemical activation stages 

  Yorgun, Sait; Yıldız, Derya; Şimşek, Yunus Emre (Taylor and Francis, 2016)

  Paulownia wood was used as a raw material in the preparation of activated carbon by chemical activation with phosphoric acid. The conversion of wood into activated carbon consists of sample preparation, impregnation, ...

• Preparation and Characterization of High Purity Silica Obtained from Rice Husks 

  Şimşek, Yunus Emre (Polish Academy of Sciences Institute of Physics, 2017)

  Although SiO2 is produced mostly from mineral sources like quartz, it has recently been obtained from lignocellulosic natural resources, such as rice husk (hull). Several methods for extracting silica (SiO2) from rice husks ...

• Effect of Atmosphere and Temperature Treatment on Leoanarditefor Increasing Humic Acid Yield 

  Şimşek, Yunus Emre; Değirmenci, Levent (Springer, 2018)

  Humic acid is a complex molecule including carboxylic, phenolic, alcoholic, and carbonyl fractions in its structure. Addition of this complex structure in soil improves its fertility by increasing its porosity along ...

• Effect of blended cements with natural zeolite and industrial by-products on rebar corrosion and high temperature resistance of concrete 

  Karakurt, Cenk; Topçu, İlker Bekir (Elsevier, 2012)

  In this study, influence of blended cements produced with different types of pozzolans on rebar corrosion and high temperature resistance of concrete was investigated. For this reason, natural zeolite (Z), fly ash (FA), ...

• Advanced life cycle integrated exergoeconomic analysis of building heating systems: An application and proposing new indices 

  Açıkkalp, Emin; Hepbaşlı, Arif; Yücer, Cem Tahsin; Karakoç, Tahir Hikmet (Elsevier, 2018)

  Advanced exergy-based analysis and assessment tools have been considered very useful tools for detecting the interactions among components of energy-conversion systems and the real potential for improving each component ...

• Combined Utilization KmnO4 Modified Starch Particles with Glycerol as De-Icer 

  Emre, Deniz; Şimşek, Yunus Emre; Değirmenci, Levent (Osman SAĞDIÇ, 2019)

  An alternative de-icer system consisted of biodegradable starch-modified KMnO4 (MS), and glycerol solution was proposed and tested with the present study. Experiments were performed with varying KMnO4 (10, 15, 25%) ...

• ULTRASONIC MODIFICATION EFFECT OF ACTIVATED CARBONS ON THE REMOVAL OF ARSENIC IN WASTERWATERS 

  Aydın, Harun; Şimşek, Yunus Emre (İKSAD, 2020)

  Arsenic contamination is a global threat and challenge humankind faces due to its carcinogenic and toxic effects on humans and environment. Typical arsenic removal methods in wastewaters are Oxidation-precipitation, ...

• Synthesis and Characterization of Hydroxyapatite Produced by Microwave Assisted Precipitation Technique 

  Şimşek, Yunus Emre; Avcı, Şenol (Polish Academy of Sciences Institute of Physics, 2019)

  In medical applications, the compliance and integration of bone with implant are a critical issue. Biocompatible metal substrates coated by suitable materials such as calcium phosphates, especially hydroxyapatite, ...

• Determination of Optimal Conditions for Production of Highly Porous Carbon by Chemical Activation Method 

  Şimşek, Yunus Emre (Polish Academy of Sciences Institute of Physics, 2019)

  Activated carbon is a complex and crude form of graphite. Compared to graphite, activated carbon exhibits an unusual imperfect structure that is tremendously porous ranging from nanopore to milipore sizes. Its ...

• Microstructure properties of waste tire rubber composites: an overview 

  Karakurt, Cenk (Review, 2015)

  More than 1.5 billion tires are produced worldwide per year. This causes environmental pollution in the nature. Studies have shown that scrap tire rubbers can be used as aggregates in concrete mixtures and as modifiers in ...

• Influence of SiC addition on tribological properties of SiAlON 

  Mallik, Awadesh Kumar; Reddy, Kolan Madhav; Çalış Açıkbaş, Nurcan; Kara, Ferhat; Mandal, Hasan; Basu, Debabrata; Basu, Bikramjit (Elsevier, 2011)

  The tribological properties of gas pressure sintered SiAlON and its composite with 18 wt% silicon carbide (SiC) against two different mating materials, i.e., alumina and SiAlON are evaluated. SiAlON and SiAlON–18%SiC ...

• The influence of zeolite and powdered Bayburt stones on the water transport kinetics and mechanical properties of hydrated lime mortars 

  Toklu, Yusuf Cengiz; İnce, Ceren; Derogar, Shahram; Yardımcı, Nesrin (Elsevier, 2015)

  The purpose of this paper is an investigation of the possible role of zeolite and powdered Bayburt stones on the fresh and hardened properties of hydrated lime (CL90) mortars. Parameters studied in this paper form the ...

• A comparative study on corrosion of Mg-Al-Si alloys 

  Candan, Şennur; Candan, Ercan (Elsevier, 2017)

  Corrosion behavior of various Mg−Al−Si alloys (AS11, AS21, AS41, AS61 and AS91 series), cast under the same cooling conditions and controlled alloying composition, was investigated systematically. Optical microscopy and ...

• Comparative study on corrosion behaviors of Mg-Al-Zn alloys 

  Candan, Şennur; Candan, Ercan (Elsevier, 2018)

  A comparative study on corrosion behaviors of various Mg−Al−Zn alloys (AZ21, AZ41, AZ61 and AZ91 series, cast under same cooling conditions and controlled alloying composition) was carried out. Scanning electron microscopy ...

• Effect of Activated Carbon Parameters on the Surface Properties of Wheat Straw Residue 

  Şimşek, Yunus Emre (IBCESS, 2016)

  Activated carbon has perfectly developed porosity, a large surface area (up to 3500 m2 g-1), and modifiable surface chemistry properties and exhibits a comparatively high degree of surface reactivity. Due to these reasons, ...

• An Optimization Model For Carbon Capture Storage/Utilization Vs. Carbon Trading: A Case Study Of Fossil-Fired Power Plants İn Turkey 

  Ağralı Taşkın, Semra; Üçtuğ, Fehmi Görkem; Atılgan Türkmen, Burçin (Elsevier, 2018)

  We consider fossil-fired power plants that operate in an environment where a cap and trade system is in operation. These plants need to choose between carbon capture and storage (CCS), carbon capture and utilization (CCU), ...

• Obtaining Hydrocarbon Rich Bio-Oil Via Catalytic Co-Pyrolysisof Plastic Wastes And Spirulina Sp. Microalgae 

  Özçakır, Gamze; Karaduman, Ali (IJRES, 2019)

  Synergic effect of microalgae, polystyrene and low density polyethylene on the co-pyrolytic bio-oil product yield and composition were investigated. Spirulina in powder form was used as microalgae source, while the mixture ...

• Detecting Chemicals With High Yield İn Pyrolytic Liquid Of Spirulina Sp. Microalgae Via GC-MS 

  Özçakır, Gamze; Karaduman, Ali (2020)

  Pyrolysis of Spirulina sp. Microalgae was carried out in a semi-batch glass reactor system. Effect of temperature on the yields of pyrolytic products (gaseous, liquid and solid residue) and chemical composition of the ...

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