Yazar "Özbay Nurgül" için listeleme
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Bio-oil production from rapid pyrolysis of cottonseed cake: product yields and compositions
Özbay Nurgül; Pütün, Ayşe Eren; Pütün, Ersan (Wiley, 2006)Fixed-bed fast pyrolysis experiments have been conducted on a sample of cottonseed cake to determine the effects of pyrolysis temperature, heating rate and sweep gas flow rate on pyrolysis yields and chemical compositions ... -
Biocrude from biomass: pyrolysis of cottonseed cake
Özbay Nurgül; Pütün, Ayşe Eren; Uzun, Başak Burcu; Pütün, Ersan (Pergamon-Elsevier Science LTD, 2001)Fixed-bed pyrolysis experiments have been conducted on a sample of cottonseed cake to determine the possibility of being a potential source of renewable fuels and chemicals feed-stocks, in two different reactors, namely a ... -
Biodiesel production from waste frying oils: Optimization of reaction parameters and determination of fuel properties
Uzun, Başak Burcu; Kılıç, Murat; Özbay Nurgül; Pütün, Ayşe Eren; Pütün, Ersan (Pergamon-Elsevier Science LTD, 2012)Alkali-catalyzed transesterification of waste frying oils (WFO) was carried out in various conditions to investigate the effects of catalyst concentration, reaction time, methanol/oil molar ratio, reaction temperature, ... -
Catalytic upgrading of pyrolysis vapours: Effect of catalyst support and metal type on phenolic content of bio-oil
Yaman, Elif; Yargic, Adife Seyda; Özbay Nurgül; Uzun, Başak Burcu; Kalogiannis, Konstantinos G.; Stefanidis, Stylianos D.; Lappas, Angelos A. (Elsevier Sci LTD, 2018)Bio-oil from low-cost and renewable lignocellulosic biomass is a complex mixture of organic compounds and water. It is necessary to selectively control the biomass pyrolysis pathways to obtain specific bio-oils rich in ... -
Characterization of Chars from Steam Pyrolysis of Apricot Pulp
Özbay Nurgül; Pütün, Ayşe Eren (Taylor & Francis Inc, 2011)The characterization of apricot pulp char obtained from steam pyrolysis was studied. The char was prepared by pyrolyzing apricot pulp temperatures ranging from 300 to 700 degrees C under steam atmospheres. The chemical ... -
Comparative analysis of pyrolysis oils and its subfractions under different atmospheric conditions
Özbay Nurgül; Uzun, Başak Burcu; Varol, Esin Apaydın; Pütün, Ayşe Eren (Elsevier Science BV, 2006)In this paper comparative analysis of bio-oils and their subtraction from static, sweeping gas and steam pyrolysis of apricot pulp, a food industry waste, was investigated. Experimental studies were conducted in a well-swept ... -
Comparison between the "slow" and "fast" pyrolysis of tobacco residue
Pütün, Ayşe Eren; önal, Eylem; Uzun, Başak Burcu; Özbay Nurgül (Elsevier Science BV, 2007)In this study, the trends in yields and product compositions of slow pyrolysis and fast pyrolysis were determined and compared with each other. Slow pyrolysis of tobacco residues with particles of between 0.425 and 0.850 ... -
Effect of steam on the pyrolysis of biomass
Pütün, Ayşe Eren; Özbay Nurgül; Pütün, Ersan (Taylor & Francis Inc, 2006)A comparative study of the thermochemical behavior of cottonseed cake in static, nitrogen and steam atmospheres has been carried out. The influence of the different atmospheres in the yield and composition were observed. ... -
Fixed-bed pyrolysis of cotton stalk for liquid and solid products
Pütün, Ayşe Eren; Özbay Nurgül; Önal, EP; Pütün, Ersan (Elsevier Science BV, 2005)The pyrolysis of cotton stalk was studied for determining the main characteristics and quantities of liquid and solid products. Particular variables investigated were temperature (from 400 degrees C to 700 degrees C), ... -
Fixed-bed pyrolysis of cottonseed cake: Product yields and compositions
Pütün, Ayşe Eren; Özbay Nurgül; Koçkar, Ömer Mete; Pütün, Ersan (Taylor & Francis, 1997)Fired-bed pyrolysis experiments have been conducted on a sample of cottonseed cake to determine the possibility of being a potential source of renewable fuels and chemical feedstocks. The effects of heating rate, pyrolysis ... -
pH dependence of electrokinetic behavior of dolomite and magnesite in aqueous electrolyte solutions
Gence, Nermin; Özbay Nurgül (Elsevier Science BV, 2006)In this paper. electrokinetic potential and isoelectric point of dolomite (CaMg(CO3)2) and magnesite (MgCO3) were determined. The effect of various ions such as Mg2+, Ca2+, Na+ and CO32- on surface properties of dolomite ... -
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 ... -
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 ... -
Structural analysis of bio-oils from pyrolysis and steam pyrolysis of cottonseed cake
Özbay Nurgül; Pütün, Ayşe Eren; Pütün, Ersan (Elsevier Science BV, 2001)Structural analysis and the effect of the water vapour on the structure of the products obtained by low temperature thermal destruction of biomass at atmospheric pressure has been investigated. The liquid products were ... -
Synthetic fuel production from tea waste: Characterisation of bio-oil and bio-char
Uzun, Başak Burcu; Apaydın-Varol, Esin; Ateş, Funda; Özbay Nurgül; Pütün, Ayşe Eren (Elsevier Sci LTD, 2010)The pyrolysis of tea waste was studied for determining the main characteristics and quantities of liquid and solid products. Particular investigated process variables were temperature (673-973 K), heating rate (5-700 K min ...
