Department of Chemical Engineering, Article

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Recent Submissions

Effects of fluorination and thermal shock on the photocatalytic activity of Bi2O3 nanopowders
Bouzıanı, Asmae; Park, Jongee; Öztürk, Abdullah (2021-10-05)
© 2021 Elsevier B.V.Fluorinated Bi2O3 (F-Bi2O3) nanopowder was prepared via fluorination followed by thermal shock of α-Bi2O3 nanopowder. The XRD, FTIR, SEM, and DRS characterization techniques were employed to investigate...
Development of a novel PANI@WO3 hybrid composite and its application as a promising adsorbent for Cr(VI) ions removal
Hsini, Abdelghani; Naciri, Yassine; Laabd, Mohamed; Bouzıanı, Asmae; Navío, J.A.; Puga, F.; Boukherroub, Rabah; Lakhmiri, Rajae; Albourine, Abdallah (2021-10-01)
© 2021 Elsevier LtdIn the current study, an in-situ oxidative polymerization method was used to synthesize polyaniline-coated tungsten trioxide biphasic composite (PANI@WO3). The as-developed composite material properties ...
Influence of bag filter ash to spectral thermal radiation in fluidized bed combustors Co-Fired with biomass
Yaşar, Mehmet Soner; Selçuk, Nevin; Külah, Görkem (2021-09-01)
© 2021 Elsevier Masson SASInfluence of fine particles collected in bag filter on spectral thermal radiation is investigated in the freeboard of a 0.3 MWt atmospheric bubbling fluidized bed combustion test rig where lignite...
Influence of soot on radiative heat transfer in bubbling fluidized bed combustors
Yaşar, Mehmet Soner; Selçuk, Nevin; Külah, Görkem (2021-08-01)
© 2021The effect of soot particles and aggregates on radiative heat transfer in bubbling fluidized bed combustors is investigated. For this purpose, a soot radiative property model based on Rayleigh scattering theory is co...
Organic/metal-organic photosensitizers for dye-sensitized solar cells (DSSC): Recent developments, new trends, and future perceptions
Yahya, Mohamed; Bouzıanı, Asmae; OCAK, CEMİL; SEFEROĞLU, ZEYNEL; Sillanpää, Mika (2021-08-01)
© 2021 Elsevier LtdHumankind is currently heavily reliant on fossil fuel for its energy supply. However, fossil fuels are a nonrenewable source. It requires hundreds of millions of years for fossil fuels to develop inside ...
Poly(methyl methacrylate)-octatrimethylsiloxy polyhedral oligomeric silsesquioxane composite syntactic foams with bimodal pores
Ozkutlu, Merve; Bayram, Göknur; Dilek Hacıhabiboğlu, Çerağ (2021-06-01)
© 2021, The Polymer Society, Taipei.Bimodal poly(methyl methacrylate) (PMMA) foams are produced with a new method combining syntactic foam production and supercritical CO2 (scCO2) foaming. Bimodal pore structure offers sev...
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...
Construction of phase diagrams to estimate phase transitions at high pressures: A critical point at the solid liquid transition for benzene
Ibrahimoglu, Beycan; Üner, Deniz; Veziroglu, Ayfer; Karakaya, Fuat; Ibrahimoglu, Beycan (2021-04-01)
Phase diagrams are an integral part of the estimation of material properties in the case of high temperature and pressure. The pressure-temperature (P-T) phase diagram is used to determine the state of aggregation (solid, ...
Gas velocity distribution in conical spouted beds with high-density particles
Doğan, Neslin; KÖKSAL, MURAT; Külah, Görkem (2021-03-01)
Local gas velocity measurements were conducted utilizing a Pitot tube in two small-scale (D-c = 150 mm, gamma = 30 degrees, 60 degrees) and one large-scale (D-c = 250 mm, gamma = 66 degrees) conical spouted beds. Three dif...
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...
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...
CO2 hydrogenation to methanol and dimethyl ether at atmospheric pressure using Cu-Ho-Ga/gamma-Al2O3 and Cu-Ho-Ga/ZSM-5: Experimental study and thermodynamic analysis
Tuygun, Cansu; İpek Torun, Bahar (2021-01-01)
CO2 valorization through chemical reactions attracts significant attention due to the mitigation of greenhouse gas effects. This article covers the catalytic hydrogenation of CO2 to methanol and dimethyl ether using Cu-Ho-...
Fluoride-free synthesis of mesoporous [Al]-[B]-ZSM-5 using cetyltrimethylammonium bromide and methanol-to-olefin activity with high propene selectivity
Yalcin, Busra Karakaya; İpek Torun, Bahar (2021-01-01)
Large ZSM-5 crystals containing [B]-sites and mesopores with 2.5 nm pore sizes are synthesized in a fluoride-free, low OH- medium using cethyltrimethylammonium bromide as mesoporogen and 1,6-diaminohexane as structure dire...
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...
Effects of biomimetic synthesis route and sintering temperature on physicochemical, microstructural, and mechanical properties of hydroxyapatite
Kaya, Yasemin; Jodati, Hossein; Evis, Zafer (2021-01-01)
© 2021, Australian Ceramic Society.Biomimetic synthesis of bioceramics using simulated body fluid (SBF) is a route to produce biomaterials with a more suitable microstructure and characteristics required for bone defect tr...
Synthetic Lubricants Derived from Plastic Waste and their Tribological Performance
Hackler, Ryan A.; Vyavhare, Kimaya; Kennedy, Robert M.; Çelik, Gökhan; Kanbur, Uddhav; Griffin, Philip J.; Sadow, Aaron D.; Zang, Guiyan; Elgowainy, Amgad; Sun, Pingping; Poeppelmeier, Kenneth R.; Erdemir, Ali; Delferro, Massimiliano (2021-01-01)
© 2021 Wiley-VCH GmbHThe energy efficiency, mechanical durability, and environmental compatibility of all moving machine components rely heavily on advanced lubricants for smooth and safe operation. Herein an alternative f...
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...
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