Yazar "Sogancioglu, Merve" seçeneğine göre listele

Listeleniyor 1 - 6 / 6
  • Küçük Resim Yok
    Öğe
    A Comparative Study on Waste Plastics Pyrolysis Liquid Products Quantity and Energy Recovery Potential
    (ELSEVIER SCIENCE BV, 2017) Sogancioglu, Merve; Ahmetli, Gulnare; Yel, Esra
    Plastics thermal processing is an important application for both energy recovery and feedstock recycling. In this study effects of type of plastic (HDPE, LDPE, PET, PP, PS), pyrolysis process temperature and plastic waste prewashing on pyrolysis liquid product (oil) fraction, its hydrocarbon (HC) contents and heat values were investigated. Caustic washing and batch-pyrolysis were applied by keeping pyrolysis heating rate and other conditions constant. Oil yields, C10-C40 HCs, heat values were measured and compared. HDPE type plastic wastes produced the highest oil yield while PET and PP produced the lowest yields. C10-C40 HC contents of pyrolysis oils were strongly affected from the pyrolysis temperatures and pre-washing process under identical pyrolysis conditions. The highest C10-C40 HCs were produced by HDPE pyrolysis. Statistical analysis indicated that the effect of pre-washing process on the pyrolysis oil heat value is significant for HDPE and PP type plastics. Pyrolysis temperature had almost no effects on oil heat values for washed PET and unwashed PS wastes, whereas for other plastic samples, as pyrolysis temperature increased oil heat values increased. HDPE, LDPE, PP and PS pyrolysis oils have higher calorific values than wood and some coal types. These refer to energy recovery from those types of plastics. (C) 2017 The Authors. Published by Elsevier Ltd
  • Küçük Resim Yok
    Öğe
    Investigation of the Effect of Polystyrene (PS) Waste Washing Process and Pyrolysis Temperature on (PS) Pyrolysis Product Quality
    (ELSEVIER SCIENCE BV, 2017) Sogancioglu, Merve; Yel, Esra; Ahmetli, Gulnare
    Pyrolysis has been proposed as a viable processing route for recovering the organic compounds from polystyrene (PS) plastic wastes as fuels and chemical feedstock. In this study, PS plastic wastes were collected; some portion of them was washed in field-simulated laboratory scale system. Both washed and unwashed PS plastic waste samples were pyrolyzed at fixed bed reactor pyrolysis equipment. The pyrolysis process has been applied at 300, 400, 500, 600 and 700 degrees C with 5 degrees C/min heating rate. The effect of pyrolysis temperature and plastic washing process on the pyrolysis yields and solid, oil and gas products quality were investigated. The solid products (char) were characterized by FTIR and SEM. Oil and gas products were analyzed by gas chromatography coupled with a mass spectrometry (GC-MS). The heat values were determined using an automatic calorimetric bomb. Pyrolysis oil products composed of heavy hydrocarbons (C10-C40). Heating values were found between 4300-4800 kCal. Pyrolysis gases of both wased and unwashed PS mainly contain gas samples contain pentene, pentane, hexane, benzene, heptane, toluene, octane, ethylbenzene and styrene. Each of these components has potential for use as fuel or as raw materials for various industrial processes after proper separation process. (C) 2017 The Authors. Published by Elsevier Ltd
  • Küçük Resim Yok
    Öğe
    Production of Epoxy Composite from the Pyrolysis Char of Washed PET Wastes
    (ELSEVIER SCIENCE BV, 2017) Sogancioglu, Merve; Yucel, Alize; Yel, Esra; Ahmetli, Gulnare
    Pyrolysis of washed poly (ethylene terephthalate) (PET) plastic wastes was performed, pyrolysis products yields were determined and epoxy composite was prepared with char additive in this study. The pyrolysis runs were carried out in the temperature range of 300-700 degrees C in order to indicate the effects of pyrolysis temperature on products. The char from pyrolysis was used in the production of epoxy composite material and char replaced at 10 to 50 wt% of the epoxy resin. Mechanical properties, namely tensile strength, surface hardness and electrical properties were determined for the epoxy composite materials. The tensile strength increased 131% at the dose of 50% for char obtained at 300 degrees C. The hardness was improved up to 83-89 shore D from 80 shore D by the PET char additive in the composite. Epoxy composite material obtained by PET pyrolysis char additive obtained at 300 degrees C showed the better behavior in terms of elongation at break and tensile strength. (C) 2017 The Authors. Published by Elsevier Ltd
  • Küçük Resim Yok
    Öğe
    Pyrolysis of waste high density polyethylene (HDPE) and low density polyethylene (LDPE) plastics and production of epoxy composites with their pyrolysis chars
    (ELSEVIER SCI LTD, 2017) Sogancioglu, Merve; Yel, Esra; Ahmetli, Gulnare
    High density polyethylene (HDPE) and low density polyethylene (LDPE) plastic wastes were pyrolysed in the temperature range of 300-700 degrees C, liquid, gas and solid fractions (char) were quantified and pyrolysis char was used as additive in production of epoxy composite. Effects of pyrolysis temperature on products fractions, char quality and composite quality were investigated. In the composite composition, char was included as 10-50 wt% of epoxy to determine the effects of additive dosage on the composite quality. The char additives and produced composites were characterized by FTIR and SEM. Mechanical properties, namely tensile strength, surface hardness and electrical properties were determined for the epoxy composite materials. Epoxy composite materials produced with HDPE pyrolysis char additive obtained at 300 degrees C (ER300) showed the most ideal behavior in terms of elongation at break and tensile strength. With increasing pyrolysis temperature and char doses elongation at break and tensile strength of composites generally decreased. While tensile strength showed an increase by 32% at 10% wt% dose for composite (ER300) with HDPE char obtained at 300 degrees C, the increases were 21%, 14%, 14% and 13% for ER400-ER700 composites prepared with 10 wt% HDPE chars obtained at 400-700 degrees C pyrolysis temperatures, respectively. Despite this, LDPE chars a small decreased the tensile strength of epoxy. The hardness of neat epoxy was improved from 79.8 Shore D up to 86.3 and 87 Shore D by the LDPE and HDPE char additives, respectively. The study offers a new recovery approach for HDPE and LDPE type plastic wastes. (C) 2017 Elsevier Ltd. All rights reserved.
  • Küçük Resim Yok
    Öğe
    Sludge Using a Marble Processing Wastewater Treatment Method
    (DESTECH PUBLICATIONS, INC, 2014) Sogancioglu, Merve; Yel, Esra
    Cr(VI) adsorption onto dried marble processig wastewater (non-treated wastewater) solids (MPW) and dried physicochemical marble sludge from coagulation-flocculation treatment (MPWT) of an andesite processing plant's wastewater was investigated. MPW sludge and MPWT sludge were incorpotared as inorganic adsorbents in batch reactors containing aqueous Cr(VI) solutions varying between 1 and 25 mg/L. MPWT sludge was obtained with alum coagulant. A dry particulate (powder) form of sludge samples were used at a 5 g/100 mL dosage. Isotherm studies indicated that Cr(VI) adsorption by these andesite- oriented adsorbents may be characterized using a Freundlich model for MPW sludge and a Langmuir model for MPWT sludge.
  • Küçük Resim Yok
    Öğe
    Utilization of andesite processing wastewater treatment sludge as admixture in concrete mix
    (ELSEVIER SCI LTD, 2013) Sogancioglu, Merve; Yel, Esra; Yilmaz-Keskin, Ulku Sultan
    The dried physicochemical sludge from the coagulation-flocculation treatment of an andesite processing plant wastewater was used as concrete admixture in powder form. Various physicochemical sludges obtained with various coagulant/flocculants (alum, FeCl3, and sepiolite) were experienced dry particulate (powder) form of the sludge was replaced at 0.5-1.5% w/w of the cement for 250 kg/m(3) cement dosage. The admixture doses were complied with local standard. Slump tests were conducted on fresh concrete, and compressive strengths were measured for 7 and 28 days hardened concrete samples. Physical properties, namely freeze/thaw resistance, water absorption, capillary suction, void ratio and porosity were determined at the end of 28 days for the hardened concrete samples. The concrete consistency (slump) was improved up to 16-18 cm from 14.5 cm by the admixture. The best compressive strength was achieved with 0.5% w/w for admixtures. The admixture sludges obtained with organic flocculants were worse than the other admixtures. The structural changes after freeze/thaw tests were very close to the reference concrete (concrete without admixture); only the capilary suction had increased. The results confirmed that up to 0.5% of physicochemical sludge can be replaced with cement in concrete for use in certain non-load bearing structures that require medium strength concrete. (C) 2013 Elsevier Ltd. All rights reserved.