Browsing by Author "Yılmaz, Selahattin"

Acidic sites in beta zeolites in dependence of the preparation methods

Dimitrova, R.; Gündüz, Gönül; Dimitrov, L.; Tsoncheva, T.; Yılmaz, Selahattin; Urquieta-González, Ernesto Antonio (Elsevier, 2004-06)

Beta zeolites synthesized by different methods are compared in their structure peculiarities and acidic properties by nitrogen physisorption, IR-KBr, pyridine sorption-desorption and thermoprogrammed desorption of ammonia. ...

Acylation of 2-methoxynaphthalene over ion-exchanged β-zeolite

Kantarlı, İsmail Cem; Artok, Levent; Bulut, Hatice; Yılmaz, Selahattin; Ülkü, Semra (Elsevier, 2002)

Friedel-Crafts acylation of 2-Methoxynaphthalene was carried out over various ion-exchanged β zeolites (Mn+β, where Mn+: In3+, Zn2+, Al3+, Fe3+, La3+) with various anhydride (acetic, propionic and benzoic anhydrides), or ...

Characterization and catalytic activity of CuFeZSM-5 catalysts for oxidative degradation of Rhodamine 6G in aqueous solutions

Dükkancı, Meral; Gündüz, Gönül; Yılmaz, Selahattin; Yaman, Y. C.; Prikhod’ko, R. V.; Stolyarova, I. V. (Elsevier, 2010-04)

This study presents an evaluation of the catalytic performances of Fe and Cu containing ZSM-5 zeolites for oxidation of Rhodamine 6G. Fe and Cu were loaded by ion exchange or through hydrothermal synthesis. The catalytic ...

A chromatographic study of carbon monoxide adsorption on a clinoptilolite-containing natural zeolitic material

Narin, Güler; Yılmaz, Selahattin; Ülkü, Semra (Taylor & Francis, 2004-11)

In this study, the equilibrium and kinetic parameters for CO adsorption on clinoptilolite-rich natural zeolitic material were determined by the concentration pulse chromatography technique. Experiments were carried out at ...

Development of carbon nanotube embedded polyacrilonitrile/polypyrrole electrospun nanofibrous scaffolds

İnce Yardımcı, Atike (Izmir Institute of Technology, 2017-12)

In this study, electrospun polyacrilonitrile (PAN)/ polypyrrole (PPy) nanofibers containing different PPy content (10, 25, and 50 wt%) were prepared. Different carbon nanotube (CNT) amounts (1, 2, 3, and 4 wt%) were ...

Effect of different acidity modifications on the activity and selectivity on H-ZSM5 zeolites in n-butene isomerization

Kılıç, Emre; Yılmaz, Selahattin (Springer, 2014-06)

H-ZSM-5 was modified by silylation [tetraethylorthosilicate (TEOS) and triaminopropyltriethoxysilane], alkali (NaOH), acid (HCl) and ammoniumhexafluorosilicate (AHFS) treatments. The parent and modified zeolite forms were ...

Effects of catalyst precursor type and preparation conditions, and solvent type on activity and selectivity of Pt/SiO2 catalyst in citral hydrogenation

Depboylu, Can Okan; Yılmaz, Selahattin; Akkurt, Sedat (Walter de Gruyter, 2011)

In this study, citral hydrogenation reaction in liquid phase over silica gel supported Pt catalysts was investigated. It was desired to hydrogenate carbonyl group selectively to produce valuable unsaturated alcohols, namely ...

The effects of catalyst pretreatment, growth atmosphere and temperature on carbon nanotube synthesis using Co-Mo/MgO catalyst

İnce Yardımcı, Atike; Yılmaz, Selahattin; Selamet, Yusuf (Elsevier, 2015-11)

The growth of high quality and high yield carbon nanotubes (CNTs) by catalytic chemical vapor deposition (CVD) of CH4 over Co-Mo/MgO catalyst was investigated for different growth temperatures and H2 flow rates. It was ...

Epoxidation of soybean oil over mesoporous MoO3/Ti-SBA-15 and Ti-SBA-15 catalysts

Taş, Canan (Izmir Institute of Technology, 2018-11-01)

In this study, it was aimed to develop heterogeneous acidic mesoporous catalysts for epoxidation of soybean oil. For this, Ti-SBA-15 catalysts were prepared by hydrothermal synthesis with two Si/Ti molar ratios (10, 20). ...

Esterification of cetyl alcohol with palmitic acid over WO3/Zr-SBA-15 and Zr-SBA-15 catalysts

Mutlu, Nahide Nuran; Yılmaz, Selahattin (Elsevier, 2016-07)

Tungsten loaded and Zr incorporated SBA-15 catalysts (WO3/Zr-SBA-15 and Zr-SBA-15) were developed for esterification of cetyl alcohol and palmitic acid. The influence of the Zr content, tungsten loading amount, calcination ...

Fe containing ZSM-5 zeolite as catalyst for wet peroxide oxidation of orange II

Bolova, Emre; Gündüz, Gönül; Dükkancı, Meral; Yılmaz, Selahattin; Yaman, Yadigar Ceyda (De Gruyter, 2011)

This study presents the catalytic performances of iron containing ZSM-5 zeolites, prepared by ion exchange or hydrothermal synthesis, in catalytic Fenton-like oxidation of Orange II in aqueous solution. The catalyst, ZSM-5 ...

Fructose dehydration to 5-hydroxymethylfurfural over sulfated TiO2-SiO2, Ti-SBA-15, ZrO2, SiO2, and activated carbon catalysts

Kılınç, Emre; Yılmaz, Selahattin (American Chemical Society, 2015-05-20)

Different sulfated catalysts including SO4/TiO2-SiO2, SO4/Ti-SBA-15, SO4/ZrO2, SO4/AC, and SO4/SiO2 were tested in fructose dehydration to 5-hydroxymethylfurfural (HMF). Reactions were carried out in dimethyl sulfoxide ...

Heterogeneous Fenton-like degradation of Rhodamine 6G in water using CuFeZSM-5 zeolite catalyst prepared by hydrothermal synthesis

Dükkancı, Meral; Gündüz, G.; Yılmaz, Selahattin; Prihod’ko, R. V. (Elsevier, 2010-09)

In this study, heterogeneous Fenton-like degradation of reactive azo dye Rhodamine 6G in water was investigated over a CuFeZSM-5 zeolite catalyst prepared by hydrothermal synthesis. At initial pH of 3.4, a color removal ...