Search Results - "Oktar,Nuray"

Esterification of free fatty acids in waste cooking oils (WCO): Role of ion-exchange resins by Özbay, Nalan, Oktar, Nuray, Tapan, N. Alper

“…Although WCO plays a crucial role for the economical production of biodiesel, free fatty acid (FFA) level in the nature of WCO cause saponification problems…”
Get full text

Heteropolyacid Incorporated Bifunctional Core-Shell Catalysts for Dimethyl Ether Synthesis from Carbon Dioxide/Syngas by Birce Pekmezci Karaman, Nuray Oktar, Gülşen Doğu, Timur Dogu

“…Core-shell-type catalysts, which are synthesized by encapsulating the Cu-ZnO-Alumina type methanol synthesis catalyst (CZA) by silicotungstic acid…”
Get full text

Bifunctional Silicotungstic Acid and Tungstophosphoric Acid Impregnated Cu–Zn–Al & Cu–Zn–Zr Catalysts for Dimethyl Ether Synthesis from Syngas by Pekmezci Karaman, Birce, Oktar, Nuray, Doğu, Gülşen, Doğu, Timur

“…In the present study, a set of methanol synthesis catalysts with different Cu/Zn/Al or Cu/Zn/Zr molar ratios were synthesized by a co-precipitation method…”
Get full text

Production of value-added chemicals from esterification of waste glycerol over MCM-41 supported catalysts by Kaya Ekinci, Emine, Oktar, Nuray

“…A series of active and selective MCM-41 supported catalysts have been successfully prepared and used for bioderived glycerol esterification with acetic acid to…”
Get full text

Catalytic performances of Ni and Cu impregnated MCM-41 and Zr-MCM-41 for hydrogen production through steam reforming of acetic acid by Cakiryilmaz, Nurbanu, Arbag, Huseyin, Oktar, Nuray, Dogu, Gulsen, Dogu, Timur

“…[Display omitted] •Zr-MCM-41 were synthesized successfully using a one-pot hydrothermal procedure.•Performances of Cu based catalyst are poor in terms of steam…”
Get full text

Dimethyl ether from syngas and effect of CO2 sorption on product distribution over a new bifunctional catalyst pair containing STA@SBA-15 by Ozcan, Merve Celik, Karaman, Birce Pekmezci, Oktar, Nuray, Dogu, Timur

“…•STA incorporated SBA-15 catalyst gave excellent performance in DME synthesis.•High Bronsted acidity enhance the DME selectivity.•Nearly 60% DME selectivity…”
Get full text

Comparison of microwave and conventionally heated reactor performances in catalytic dehydrogenation of ethane by Eryildirim, Busra, Arbag, Huseyin, Oktar, Nuray, Dogu, Gulsen

“…In the present study, non-oxidative dehydrogenation of ethane was carried out by using conventional heated (CHRS) and microwave heated (MWHRS) reactor systems…”
Get full text

Effect of W incorporation on the product distribution in steam reforming of bio-oil derived acetic acid over Ni based Zr-SBA-15 catalyst by Cakiryilmaz, Nurbanu, Arbag, Huseyin, Oktar, Nuray, Dogu, Gulsen, Dogu, Timur

“…Zirconia incorporated SBA-15 type mesoporous material was synthesized following a one-pot hydrothermal route, characterized and used as the catalyst support in…”
Get full text

Tungstophosphoric acid incorporated hierarchical HZSM-5 catalysts for direct synthesis of dimethyl ether by Pekmezci Karaman, Birce, Oktar, Nuray

“…HZSM-5 zeolites are active materials in dimethyl ether (DME) production with high surface acidity. In this study, hierarchical HZSM-5 catalysts were…”
Get full text

Buhar Fazında Etil Tersiyer Bütil Eter (Etbe) Sentezinde Kullanılan Polihema Bazlı Silikotungstik Asit Katalizörler by Oktar,Nuray, Değirmenci,Levent

“…PoliHEMA-Silikotungstik asit katalizörlerin (PH-STA) aktivitesi buhar fazında, 353-373K sıcaklık aralığında, isobüten/etanol (IB/EtOH) mol oranının 0,17 olduğu…”
Get full text

Effect of the amount and type of active metal and its impregnation sequence on bio-fuel production by Ozcan, Merve Celik, Degirmencioglu, Pinar, Ekinci, Emine, Karaman, Birce Pekmezci, Murtezaoglu, Kirali, Oktar, Nuray

“…This study aims to investigate biofuel production from biomass-derived bio-oil and examine the impact of selecting different active metals, their quantities,…”
Get full text

Coke-resistance enhancement of mesoporous γ-Al2O3 and MgO-supported Ni-based catalysts for sustainable hydrogen generation via steam reforming of acetic acid by Ibrahim, Saleh Ahmat, Ekinci, Emine Kaya, Karaman, Birce Pekmezci, Oktar, Nuray

“…Highly ordered mesoporous γ-Al2O3 particles and MgO materials were synthesized by evaporation induced self-assembly (EISA) and template-free hydrothermal…”
Get full text

On-site hydrogen-rich gas production from diesel: A comprehensive study on catalyst development with nickel and diverse metal oxides (MgO, La2O3, CeO2, SiO2) supported on alumina by Sahingoz, Nurbanu Cakiryilmaz, Talu, Kerem, Oktar, Nuray, Dogu, Timur, Pamuk, Ibrahim

“…The study aimed to investigate the impact of nickel-incorporating diverse metal oxides (MgO, La2O3, CeO2, SiO2) supported on alumina on the Diesel steam…”
Get full text

Catalytic Performances of Ni-containing Mesoporous TUD-1 Catalysts in Steam Reforming of Acetic Acid by Ekinci, Emine, Oruç, Merve, Oktar, Nuray, Murtezaoğlu, Kırali

“…Novel coke-resistant Ni-containing TUD-1 supported catalysts were successfully synthesized for the steam reforming of biomass-derived acetic acid. The…”
Get full text

Decomposition of formic acid over Ni-containing SiO2 catalysts synthesized by various one-pot synthesis routes by Koyuncu, Dilsad Dolunay Eslek, Ozben, Nisa, Oktar, Nuray, Murtezaoglu, Kirali

“…In this study SiO 2 supported catalysts with different nickel amounts [5Ni–SiO 2 (P123), 2,5Ni–SiO 2 (P123), 5Ni–SiO 2 (NH 3 -CA), 5Ni–SiO 2 (Tw80–NaF) and…”
Get full text

Catalytic upgrading of bio-oil model mixtures in the presence of microporous HZSM-5 and γ-Al2O3 based Ni, Ta and Zr catalysts by Guvenc, Can, Alan, Enez, Degirmencioglu, Pinar, Celik Ozcan, Merve, Pekmezci Karaman, Birce, Oktar, Nuray

“…•All synthesized catalysts showed better activity compared to microporous HZSM-5.•Zr incorporation upgraded fuel properties of bio-oil.•Presence of Brønsted…”
Get full text

Performance comparison of mesoporous alumina supported Cu & Ni based catalysts in acetic acid reforming by Pekmezci Karaman, Birce, Cakiryilmaz, Nurbanu, Arbag, Huseyin, Oktar, Nuray, Dogu, Gulsen, Dogu, Timur

“…Steam reforming of acetic acid (AcOH) was investigated over mesoporous alumina supported mono- and bi-metallic Ni and/or Cu based catalysts. Results obtained…”
Get full text

Steam reforming of acetic acid in the presence of Ni coated with SiO2 microsphere catalysts by Ozel, Sahika, Meric, Gamze Gündüz, Arbag, Huseyin, Degirmenci, Levent, Oktar, Nuray

“…Steam reforming of acetic acid was investigated in the presence of Ni@SiO2 microsphere catalysts. The effects of Ni loading, H2O/AcOH ratio, and temperature on…”
Get full text

Etherification of glycerol with C4 and C5 reactive olefins by Ikizer, Burcin, Oktar, Nuray, Dogu, Timur

“…Etherification of glycerol with C4 (i-butene) and C5 (i-amylenes: 2-Methyl-2-Butene (2M2B) and 2-Methyl-1-Butene (2M1B) mixture) i-olefins was investigated for…”
Get full text

Activity Comparison of Different Solid Acid Catalysts in Etherification of Glycerol with tert-Butyl Alcohol in Flow and Batch Reactors by Ozbay, Nalan, Oktar, Nuray, Dogu, Gulsen, Dogu, Timur

“…In the presented work, etherification of glycerol with TBA was investigated in a continuous flow and also in a batch reactor using nine different commercial…”
Get full text