Department of Chemical Engineering, Article

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Recent Submissions

Synthesis of an arginine-functionalized polyaniline@FeOOH composite with high removal performance of hexavalent chromium ions from water: Adsorption behavior, regeneration and process capability studies
Hsini, Abdelghani; Benafqir, Mohamed; Naciri, Yassine; Laabd, Mohamed; Bouzıanı, Asmae; Ez-zahery, Mohamed; Lakhmiri, Rajae; Alem, Noureddine El; Albourine, Abdallah (2021-05-20)
© 2021 Elsevier B.V.In this study, the synthesis of a novel arginine-functionalized polyaniline/FeOOH (Arg-PANI@FeOOH) composite for hazardous Hexavalent chromium ions (Cr(VI)) removal from wastewater was reported. The SEM...
Controlling the foam morphology of supercritical CO2-processed poly(methyl methacrylate) with CO2-philic hybrid nanoparticles
Özkutlu Demirel, Merve; Bayram, Göknur; Dilek Hacıhabiboğlu, Çerağ (2021-04-01)
Highly CO2-philic nanoparticles, octatrimethylsiloxy polyhedral oligomeric silsesquioxanes (POSS) are used to increase the affinity of poly(methyl methacrylate) (PMMA) to CO2 in supercritical carbon dioxide (scCO(2)) foami...
A potential catalyst for continuous methane partial oxidation to methanol using N2O: Cu-SSZ-39
Memioglu, Ozgun; İpek Torun, Bahar (2021-02-01)
Continuous catalytic methanol production from methane is reported on Cu-SSZ-39 using N2O as an oxidant. Through optimization of CH4, N2O and H2O partial pressures, a methanol formation rate of 499 mu molCH3OH g-1 h-1 and a...
Improvement in mechanical, electrical, and shape memory properties of the polystyrene-based carbon fiber-reinforced polymer composites containing carbon nanotubes
Erkmen, Berrak; Bayram, Göknur (2021-02-01)
Carbon fiber-reinforced polymers based on polystyrene matrix containing elastomer and carbon nanotubes (CNTs) were produced by compression molding. The effects of carbon fabric (CF) concentration and silane treatment on th...
Turbulence damping above the cloud height in suspensions of concentrated slurries in stirred tanks
Ayrancı Tansık, İnci; Kresta, Suzanne M. (2021-02-01)
Poor mixing in the clear liquid layer above the cloud height has been reported by several authors. This study uses LDV measurements to quantify turbulence above the cloud using a liquid level of 1.5 T to remove the barrier...
Controlling the shapes and internal complexity of the polymeric particles using liquid crystal-templates confined into microwells
KARAUSTA, ASLI; Kocaman, Ceren; Büküşoğlu, Emre (2021-02-01)
Formation and positioning of the topological defects within liquid crystalline (LC) medium confined into microwells were shown to critically effect the shapes and symmetry of the particles obtained after polymerization. Wa...
Elucidating the Barriers on Direct Water Splitting: Key Role of Oxygen Vacancy Density and Coordination over PbTiO3 and TiO2
METE, ERSEN; Ellialtioglu, Sinasi; GÜLSEREN, Oğuz; Üner, Deniz (2021-01-01)
In this work, using the state-of-the-art first-principles calculations based on density functional theory, we found that the concentration and coordination of surface oxygen vacancies with respect to each other were critic...
Ethanol fed-batch bioreactor operation to enhance therapeutic protein production in Pichia pastoris under hybrid-architectured ADH2 promoter
Wehbe, Omar; Yaman, Oğuz Ulaş; Çalık, Pınar (Elsevier BV, 2020-12-15)
We presented ethanol fed-batch bioreactor operations (FBBOs) designed for enhanced recombinant human growth hormone (rhGH) production in Pichia pastoris constructed with novel hybrid-architectured ADH2 promoter, PADH2-Cat8...
Performance of banded SLW-1 in presence of non-gray walls and particles in fluidized bed combustors
Yaşar, Mehmet Soner; Ozen, Guzide; Selçuk, Nevin; Külah, Görkem (Elsevier BV, 2020-12-01)
In this study, banded one gas spectral line-based weighted sum of gray gases (banded SLW-1) model is coupled with a 3-D radiation code based on method of lines (MOL) solution of discrete ordinates method (DOM) for freeboar...
Remarkable isosteric heat of hydrogen adsorption on Cu(I)-exchanged SSZ-39
İpek Torun, Bahar; Altiparmak, Ismihan (Elsevier BV, 2020-12-01)
Hydrogen storage capacity on Cu(I)-exchanged SSZ-39 (AEI), -SSZ-13 (CHA) and Ultra stable-Y (USeY, FAU) at temperatures between 279 K and 304 K are investigated. The gravimetric hydrogen storage capacity values reaching 83...
Engel Uzunluğunun Karıştırıcı Güç Sayısına Etkisi
Ayrancı Tansık, İnci; Gök, Gökhan (2020-12-01)
Karıştırmalı tanklarda en önemli tasarım parametrelerinden bir tanesi güç tüketimidir. Tasarım, sürecin amacı ve güç tüketiminin birlikte değerlendirilmesi sonucu, en iyi sonucun en düşük güç tüketiminde elde edildiği sist...
Ionic strength-responsive poly(sulfobetaine methacrylate) microgels for fouling removal during ultrafiltration
Çalılı, Fatma; Kaner, Papatya; Aro, Grace; Asatekin, Ayse; Çulfaz Emecen, Pınar Zeynep (2020-11-01)
Zwitterionic materials have received a lot of interest in the field of membrane science and water treatment due to their excellent fouling resistance, super-hydrophilicity, and ionic strength response. However, they have t...
Hybrid-architectured double-promoter expression systems enhance and upregulate-deregulated gene expressions in Pichia pastoris in methanol-free media
Demir, Irem; Çalık, Pınar (Springer Science and Business Media LLC, 2020-10-01)
Double-promoter expression system (DPES) design as de novo metabolic engineering strategy enables fine-tuned and enhanced gene expression. We constructed a collection of monodirectional hybrid-architectured DPESs with engi...
Modeling the discharge behavior of a lithium-sulfur battery
Erisen, Nisa; Eroglu, Damla (Wiley, 2020-10-01)
In lithium-sulfur (Li-S) batteries, the discharge performance depends greatly on a number of cell design parameters because of the complex reaction mechanisms in the cathode. Electrolyte-to-sulfur (E/S) ratio and carbon-to...
Chameleon skin-inspired polymeric particles for the detection of toluene vapor
Avsar, Deniz Isinsu; Büküşoğlu, Emre (Royal Society of Chemistry (RSC), 2020-10-01)
Inspired by the structural coloring in nature, especially the crystalline ordering and responsive characteristics of those found in chameleon skins, artificial photonic materials for sensor applications were fabricated. Ch...
Effects of mixing sequence on epoxy/polyether polyol/organoclay ternary nanocomposites
Isik-Gulsac, Isil; YILMAZER, ÜLKÜ; Bayram, Göknur (Informa UK Limited, 2020-09-01)
The effects of mixing sequence of the polyether polyol and curing agent (triethylenetetramine) on mechanical and thermal properties and morphology of epoxy/polyether polyol/organoclay ternary nanocomposites are investigate...
Phase Behavior of Carbon Dioxide and Polyhedral Oligomeric Silsesquioxanes with Two Different Functional Groups
Dumanlilar, Beril; Dilek Hacıhabiboğlu, Çerağ (Elsevier BV, 2020-09-01)
Phase behavior of carbon dioxide and polyhedral oligomeric silsesquioxanes (POSS) modified with two different functional groups is studied in the temperature range of 308-323 K, up to 22 MPa. Different than the common type...
Transcriptional regulatory proteins in central carbon metabolism ofPichia pastorisandSaccharomyces cerevisiae
Kalender, Ozge; Çalık, Pınar (2020-09-01)
System-wide interactions in living cells and discovery of the diverse roles of transcriptional regulatory proteins that are mediator proteins with catalytic domains and regulatory subunits and transcription factors in the ...
Identification and sorting of particle chirality using liquid crystallinity
AKDENİZ, BURAK; Batır, Özge; Büküşoğlu, Emre (Elsevier BV, 2020-08-15)
Particles dispersed in liquid crystals (LCs) have been shown to assemble due to the elastic interactions arising from the molecular anisotropy. Studies have shown that the alignment of the particles within LCs were strongl...
Effect of halloysite nanotubes on multifunctional properties of coaxially electrospun poly(ethylene glycol)/polyamide-6 nanofibrous thermal energy storage materials
Yilmaz, Refik Baris; Bayram, Göknur; YILMAZER, ÜLKÜ (Elsevier BV, 2020-08-01)
Coaxial electrospinning of poly(ethylene glycol) (PEG)/polyamide 6 (PA6) was successfully used in development of nanofibrous thermal energy storage (TES) material. Halloysite nanotubes (HNTs) were introduced into the core/...
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