Yazar "Pütün, Ayşe Eren" için listeleme
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Oil production from an arid-land plant: Fixed-bed pyrolysis and hydropyrolysis of Euphorbia rigida
Pütün, Ayşe Eren; Gerçel, Hasan Ferdi; Koçkar, Ömer Mete; Ege, O; Snape, CE; Pütün, Ersan (Butterworth-Heinemann LTD, 1996)Fixed-bed pyrolysis and hydropyrolysis experiments at different temperatures, heating rates and pressures have been conducted on a sample of Euphorbia rigida to investigate the product yields and characteristics. In hydrogen ... -
Optimization of Biodiesel Production and Fuel Properties of Blends
Uzun, Başak Burcu; Kılıç, Murat; Apaydın-Varol, Esin; Pütün, Ayşe Eren (Taylor & Francis Inc, 2014)In this study, optimization of essential parameters, such as reaction time, reaction temperature, methanol/oil molar ratio, catalyst amount, and type of biodiesel production via transesterification, were investigated. The ... -
Optimization of biodiesel production from castor oil using factorial design
Kılıç, Murat; Uzun, Başak Burcu; Pütün, Ersan; Pütün, Ayşe Eren (Elsevier Science BV, 2013)In this study, optimization of biodiesel production from castor oil using full factorial design was investigated. The biodiesel production was carried out in a batch laboratory scale reactor by alkaline-catalyzed ... -
Optimization of Euphorbia rigida fast pyrolysis conditions by using response surface methodology
Kılıç, Murat; Pütün, Ersan; Pütün, Ayşe Eren (Elsevier, 2014)The objective of this study was to optimize the experimental conditions for obtaining the highest bio-oil yield from Euphorbia rigida (E. rigida) by fast pyrolysis using response surface methodology (RSM) based on central ... -
Pamuk Saplarının Borusal Reaktörde Pirolizi
Özbay, Nuran; Özcan, Adnan; Pütün, Ayşe Eren (Anadolu Üniversitesi, 2000)Bu çalışmada, ülkemiz için büyük bir potansiyel olan pamuk saplan biyokütle adayı olarak seçilmiş ve sabit yataklı borusal reaktörde pirolizi gerçekleştirilmiştir. Deneyler; yavaş ısıtma hızında (7°C dk-¹), 400, 500, 550, ... -
Pamuk saplarının pirolizi ve sıvı ürününün incelenmesi
Mazlum, Ayşe Dilek (Anadolu Üniversitesi, 1998)Dünya nüfusunun hızla artması, endüstrileşme ve hızlı şehirleşme, doğal kaynakların tüketimini de hızla arttırmaktadır. Bu durum, kaynakların en akılcı şekilde kullanımını ve yeni enerji kaynaklarının değerlendirilmesinin ... -
Potentiometric titration of some imidazole derivatives in nonaqueous solvent
Pütün, Ayşe Eren; Bereket, Gözen; Özbay, Nurgül (1996)The acidity constants of 4,5-diphenyl imidazole, 2,4,5-triphenyl imidazole, and 2,4,5-triphenyl imidazole derivatives in nitrobenzene, acetonitrile and glacial acetic acid were determined. Perchloric acid, prepared in ... -
Potentiometric Titrations of Some 2-Substituted 5-Nitrobenzimidazole Derivatives in Nonaqueous Solvent
Pütün, Ayşe Eren; Bereket, Gözen; Keskin, E (American Chemical Society, 1995)The acidity constants of 16 2-substituted 5-nitrobenzimidazole derivatives were determined in dimethyl sulfoxide, 60% (v/v) isopropyl alcohol +40% (v/v) water, and 60% (v/v) dimethyl sulfoxide +40% (v/v) water by the ... -
Preparation and surface characterization of activated carbons from Euphorbia rigida by chemical activation with ZnCl2, K2CO3, NaOH and H3PO4
Kılıç, Murat; Apaydın-Varol, Esin; Pütün, Ayşe Eren (Elsevier Science BV, 2012)Preparation of activated carbons from Euphorbia rigida by chemical activation with different impregnation agents and ratios was studied. ZnCl2, K2CO3, NaOH and H3PO4 were used as chemical activation agents and four ... -
Production of bio-fuels from cottonseed cake by catalytic pyrolysis under steam atmosphere
Pütün, Ersan; Uzun, Başak Burcu; Pütün, Ayşe Eren (Pergamon-Elsevier Science LTD, 2006)The purpose of this study is to evaluate the amounts of catalytic pyrolysis products of cottonseed cake in steam atmosphere and investigate the effects of both zeolite and steam on pyrolysis yields. The effect of steam was ... -
Production of biocrudes from biomass in a fixed-bed tubular reactor: product yields and compositions
Pütün, Ayşe Eren; Özcan, Adnan; Gerçel, Hasan Ferdi; Pütün, Ersan (Elsevier Sci LTD, 2001)Fixed-bed pyrolysis in a tubular reactor were conducted on three biomass samples, Euphorbia rigida, sunflower (Helianthus annuus L.) pressed bagasse and hazelnut (Corylus avellana) shells, to determine the possibility of ... -
Products characterization study of a slow pyrolysis of biomass-plastic mixtures in a fixed-bed reactor
Cepelioğullar, Özge; Pütün, Ayşe Eren (Elsevier Science BV, 2014)In this study, co-pyrolysis of plastic wastes; polyvinyl chloride (PVC) and polyethylene terephthalate (PET) with different agricultural wastes such as cotton stalk, hazelnut shells, and sunflower residues near an arid ... -
Pyrolysis Kinetics and Thermal Decomposition Behavior of Polycarbonate - a Tga-Ftir Study
Apaydın Varol, Esin; Polat, Sevgi; Pütün, Ayşe Eren (Vinca Inst Nuclear Sci, 2014)This study covers the thermal degradation of polycarbonate by means of Thermogravimetric Analyzer coupled with Fourier transform infrared spectrometer (TGA-FTIR). Thermogravimetric analysis of polycarbonate was carried out ... -
Pyrolysis of hazelnut shells in a fixed-bed tubular reactor: yields and structural analysis of bio-oil
Pütün, Ayşe Eren; Özcan, Adnan; Pütün, Ersan (Elsevier Science BV, 1999)Fixed-bed pyrolysis experiments have been conducted on a sample of hazelnut shells to determine the possibility of being a potential source of renewable fuels and chemical feedstocks. The effects of pyrolysis temperature ... -
Pyrolysis of Peach Pulp: Effect of Chemical Additives
Özbay Nurgül; Pütün, Ayşe Eren (Taylor & Francis Inc, 2014)Peach pulp and impregnated sample have been investigated as an alternative feedstock to obtain fuels and chemicals. The effect of a series of operation variables was studied. The maximum oil was obtained as 23.24% at the ... -
Pyrolysis of two different biomass samples in a fixed-bed reactor combined with two different catalysts
Ateş, Funda; Pütün, Ayşe Eren; Pütün, Ersan (Elsevier Sci LTD, 2006)Pyrolysis of Euphorbia rigida and sesame stalk biomass samples with two selected commercial catalyst, namely DHC-32 and HC-K 1.3Q, have been conducted in a fixed-bed reactor. The effect of different catalysts and their ... -
A pyrolysis study for the thermal and kinetic characteristics of an agricultural waste with two different plastic wastes
Cepelioğullar, Özge; Pütün, Ayşe Eren (SAGE Publications LTD, 2014)In this study, thermochemical conversion of plastic wastes (PET and PVC) together with an agricultural waste (hazelnut shell) was investigated. In order to determine the thermal and kinetic behaviours, pyrolysis experiments ... -
Rapid and slow pyrolysis of pistachio shell: Effect of pyrolysis conditions on the product yields and characterization of the liquid product
Pütün, Ayşe Eren; Özbay Nurgül; Varol, Esin Apaydın; Uzun, Başak Burcu; Ateş, Funda (John Wiley & Sons LTD, 2007)This study reports the experimental results for the pyrolysis of pistachio shell under different conditions in a tubular reactor under a nitrogen flow. For the different conditions of pyrolysis temperature, nitrogen flow ... -
Rapid pyrolysis of olive residue. 1. Effect of heat and mass transfer limitations on product yields and bio-oil compositions
Uzun, Başak Burcu; Pütün, Ayşe Eren; Pütün, Ersan (American Chemical Society, 2007)In this study, the aim was to obtain high bio-oil yields in a fixed bed tubular reactor at various pyrolysis temperatures, reaction times, sweeping gas velocities, particle sizes, and heating rates. In order to improve ...