Thermal conversion of flax shives through slow pyrolysis process: in-depth biochar characterization and future potential use

Khiari, Besma; Ferjani, Amel Ibn; Azzaz, Ahmed Amine; Jellali, Salah; Limousy, Lionel; Jeguirim, Mejdi

doi:10.1007/s13399-020-00641-0

Cited by 39 publications

(14 citation statements)

References 48 publications

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“…The total conversions of microwave pre-treated wPETs were between 54% and 59% under the non-catalytic conditions (Exp. [14][15][16][17], while the total conversion of microwave non-pre-treated wPETs was 51% (Exp. 9).…”

Section: Effect Of Process Parameters On Pet Pyrolysismentioning

confidence: 99%

“…9) obtained more than microwave pre-treated wPETs (Exp. [14][15][16][17][18][19][20][21]. Both the lowest PAS + AS yield and the highest oil + gas yield were obtained in presence of NaBH 4 at 425 C reaction temperature (Exp.…”

Section: Effect Of Process Parameters On Pet Pyrolysismentioning

confidence: 99%

“…The microwave pre-treatment also transformed the compounds that formed the liquid products into lower C compounds (Table 3) (Exp. 15,16). Long-chain paraffins and naphthalenes are formed at higher concentrations under non-catalytic conditions.…”

Section: Gc-ms Analysis Of the Oilsmentioning

confidence: 99%

“…Pyrolysis of waste plastics is carried out at 350-900 C to allow macromolecular structures to break down into smaller molecules. [12][13][14][15] In addition, there are many parameters such as reactor type, process method, 16 pressure, type of feedstock, reaction time and gas medium, 17 catalyst quantity and properties, 18 which affect the efficiency and selectivity of the products obtained as a result of pyrolysis. The most important advantage of pyrolysis is that the process parameters are controlled according to the desired products (gas, liquid, solid).…”

mentioning

confidence: 99%

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Characterization of products obtained of waste polyethylene terephthalate by pyrolysis

Olam

Karaca

2022

Env Prog and Sustain Energy

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In this study, waste polyethylene terephthalate (wPET) was converted to liquid fuel by the pyrolysis method. It was also investigated both effects of microwave pre‐treatment and catalyst (sodium borohydride) on total conversion and oil + gas yield. The reaction temperature of 375–425°C and the reaction time of 30 min are sufficient for the pyrolysis of waste plastic samples in a batch reactor. In the pyrolysis of wPETs, the highest oil + gas yield of 45% was obtained under the conditions of reaction temperature of 425°C and reaction time of 30 min. The highest total conversion was 62% of microwave pre‐treated wPETs under catalytic conditions. It can be argued that microwave pre‐treatment and NaBH4 influence the oil + gas yield in pyrolysis experiments. According to the gas chromatography–mass spectrometry (GC–MS) analysis results of the oil products, they consist of aromatic, mono and multi‐ring aromatic compounds and polyaromatic compounds. Higher heating values of the solid products obtained in pyrolysis are approximately 4000–6000 cal/g. According to X‐ray diffraction analysis (XRD) of the solid products, they consist largely of crystalline terephthalic acid (C8H6O4).

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Section: Effect Of Process Parameters On Pet Pyrolysismentioning

confidence: 99%

Section: Effect Of Process Parameters On Pet Pyrolysismentioning

confidence: 99%

Section: Gc-ms Analysis Of the Oilsmentioning

confidence: 99%

mentioning

confidence: 99%

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Characterization of products obtained of waste polyethylene terephthalate by pyrolysis

Olam

Karaca

2022

Env Prog and Sustain Energy

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“…The thermal kinetics of date palm residues samples can be examined under non-isothermal conditions at various different heating rates [18]. The calculation of these parameters are usually based on the Arrhenius equation and, the linear regression method is often used [4,9,28]. However, to the best of our knowledge, this task has not been carried out for the ziziphus wood.…”

Section: Introductionmentioning

confidence: 99%

Investigations on potential Tunisian biomasses energetic valorization: thermogravimetric characterization and kinetic degradation analysis

Mabrouki¹,

Abbassi²,

Khiari³

et al. 2022

Comptes Rendus. Chimie

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In this work, six Tunisian local biomasses, namely ziziphus wood (ZW), almond shells (AS), olive stones (OS), vine stems (VS) and date palm leaflets (DPL) and trunks (DPT) were slowly pyrolyzed under inert atmosphere at a heating rate of 5 °C/min through thermogravimetric (TG) analyses. The thermal degradation of samples involves the interaction in a porous media of heat, mass and momentum transfer with chemical reactions. Heat is transported by conduction, convection and radiation and, mass transfer is driven by pressure and concentration gradients. Thermal degradation curves have been studied with minute details for each degradation step. The Coats-Redfern model was used to extract the kinetic parameters from the TG data, then the kinetic parameters such as the activation energy, the pre-exponential factor and the order of the reaction were calculated. Results showed that the total mass losses amounts and kinetics are dependent on the type of the used biomass. Moreover, the devolatilization could be described by the first order model, while the char formation stage was better described by the second and third order reactions model. The physicochemical characteristics of these samples were also determined. The volatile matter (VM) content varies considerably, with values ranging from 67.19% for AS to 77.4% for ZW. The maximum values were obtained for ZW and VS with values of 77.4% and 71.9%, respectively. The lowest value (67.19%) was determined for AS. In addition, the ash contents vary between 0.8% for OS and 5.66% for DPT.

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Valorization of waste biaxially‐oriented polypropylene plastic films by its co‐carbonization with almond leaves

Adeniyi

Amusa²,

Iwuozor

et al. 2023

Env Prog and Sustain Energy

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This study utilized the top-lit updraft technology for the co-carbonization of waste biaxially-oriented polypropylene (BOPP) and almond leaves (Terminalia catappa) for the production of hybrid biochar, which was then further characterized. Biochar was also synthesized and characterized using the almond leaves alone, as it served as control for the study. The carbonization process, which ran for 100 min, gave a yield of 39.4% and 33.9% for biochar and hybrid biochar, respectively. FTIR spectra showed the presence of functional groups such as amine and carbonyl groups in the hybrid biochar. EDX results showed that the hybrid biochar contained about 57.3% carbon, in combination with other elements. SEM micrographs confirmed the presence of the plastic in the hybrid biochar. In addition, the hybrid biochar had a BET surface area of 366.8 m 2 /g and a pore diameter of 2.093 nm. DTA/TGA analysis showed that the presence of the plastics decreased the thermal stability of the hybrid biochar. This study supports the use of Terminalia catappa leaves as a reliable precursor for the synthesis of biochar and hybrid biochar.

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Thermal conversion of flax shives through slow pyrolysis process: in-depth biochar characterization and future potential use

Cited by 39 publications

References 48 publications

Characterization of products obtained of waste polyethylene terephthalate by pyrolysis

Characterization of products obtained of waste polyethylene terephthalate by pyrolysis

Investigations on potential Tunisian biomasses energetic valorization: thermogravimetric characterization and kinetic degradation analysis

Valorization of waste biaxially‐oriented polypropylene plastic films by its co‐carbonization with almond leaves

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