Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.13087/239
Title: Utilization of date palm stones for bio-oil and char production using flash and fast pyrolysis
Authors: Ateş, Funda
Yaşar, Birsen
Keywords: Date palm stones
Flash pyrolysis
Fast pyrolysis
Bio-oil
Char
Adsorption
Issue Date: 2021
Publisher: Springer Heidelberg
Abstract: Flash and fast pyrolysis of date palm stones (Phoenix dactylifera L.) was carried out in two different well-swept fixed-bed reactors under a nitrogen atmosphere and the effect of pyrolysis temperature (400-700 degrees C) and retention time on the product yields and compositions was investigated. The results show that fast or flash pyrolysis of date palm stones yields more bio-oil than char or non-condensable gases, especially at moderate temperatures. A maximum bio-oil yield was obtained at a pyrolysis temperature of 500 degrees C as 40.4% and 38.3% via the flash and fast pyrolysis methods, respectively. The functional groups, morphology, surface areas, and the C, H, N, and O and ash, moisture, volatile matter, and fixed carbon content of the chars were examined using Fourier transform infrared spectroscopy, scanning electron microscopy, Brunauer-Emmett-Teller, ultimate analysis devices, and proximate analysis, respectively. Chars with a maximum surface area were used for the adsorption of dyes from aqueous solutions and the adsorption capacity and the kinetics of the chars were determined. Bio-oil composition was investigated using gas chromatography/mass spectrometry and the content of C, H, N, and O was determined by ultimate analysis. The results show that the saturation adsorption capacities of char from flash pyrolysis are 100 and 70.9 mg/g for Methylene Blue and Acid Red 111, and that these values from fast pyrolysis are 105.2 and 97.1 mg/g for Methylene Blue and Acid Red 111, respectively. The bio-oils contain higher levels of oxygen than the chars. The heating values vary from 27.5 to 31.3 MJ/kg and from 24.9 to 28.2 MJ/kg for bio-oils and chars, respectively. In addition, the bio-oil products from the pyrolysis of date palm stones are predominantly fatty acids. The results indicate that the bio-oil products obtained by the pyrolysis of date palm stone may be used as fuel or for the production of chemicals, and the solid products used as fuel or adsorbents.
URI: https://doi.org/10.1007/s13399-021-01350-y
https://hdl.handle.net/20.500.13087/239
ISSN: 2190-6815
2190-6823
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu
WoS İndeksli Yayınlar Koleksiyonu

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