The use of waste matter after olive grove pruning for the preparation of charcoal. The influence of the type of matter, particle size and pyrolysis temperature

Calahorro, C. Valenzuela; Serrano, Vicente Gómez; Alvaro, J.Hernández; García, Álvaro

doi:10.1016/0960-8524(92)90113-c

Cited by 17 publications

(10 citation statements)

References 6 publications

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“…In an earlier work, leaves, branch barks, twigs (small branch of 1 cm) and olive wood (sawdust particle size 0.8-1 mm, cubes of 1, 2, 3, or 4 cm edge) were subjected to pyrolysis at 400, 500 and 600 • C (10 • C/min heating rate, 20 min residence time at the final temperature, 200 cm 3 /min N 2 stream) [68]. Based on its high content of volatile matter and ash and the low process yield, the charcoal obtained from the pyrolysis of olive leaves was regarded as low-quality charcoal.…”

Section: Pyrolysismentioning

confidence: 99%

“…Based on its high content of volatile matter and ash and the low process yield, the charcoal obtained from the pyrolysis of olive leaves was regarded as low-quality charcoal. These authors pointed out that since olive leaves are used to feed cattle, this is a more appropriate alternative to pyrolysis [68]. By contrast, in spite of the fact the charcoals obtained from the pyrolysis of branch bark, twig and wood (sawdust or cubes) also had a high ash content, their volatile matter and fixed carbon contents made them suitable for the production of B category briquettes in accordance with the French and Belgian regulations in force at the date of publication of that paper [68], both regulations were dating from 1984.…”

Section: Pyrolysismentioning

confidence: 99%

“…These authors pointed out that since olive leaves are used to feed cattle, this is a more appropriate alternative to pyrolysis [68]. By contrast, in spite of the fact the charcoals obtained from the pyrolysis of branch bark, twig and wood (sawdust or cubes) also had a high ash content, their volatile matter and fixed carbon contents made them suitable for the production of B category briquettes in accordance with the French and Belgian regulations in force at the date of publication of that paper [68], both regulations were dating from 1984. With regards to the effect of temperature pyrolysis on the resulting charcoals, the fixed carbon content increased and that of the volatile matter decreased as the temperature in which the process was performed rose from 400 • C to 600 • C. Finally, the Brunauer-Emmett-Teller (BET) surface area of the charcoals obtained from leaves and branch barks were very low (5 and 16 m 2 /g, respectively), while those of twigs and different olive woods ranged between 19 m 2 /g and 198 m 2 /g [68].…”

Section: Pyrolysismentioning

confidence: 99%

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Energetic Valorisation of Olive Biomass: Olive-Tree Pruning, Olive Stones and Pomaces

et al. 2020

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Olive oil industry is one of the most important industries in the world. Currently, the land devoted to olive-tree cultivation around the world is ca. 11 × 106 ha, which produces more than 20 × 106 t olives per year. Most of these olives are destined to the production of olive oils. The main by-products of the olive oil industry are olive-pruning debris, olive stones and different pomaces. In cultures with traditional and intensive typologies, one single ha of olive grove annually generates more than 5 t of these by-products. The disposal of these by-products in the field can led to environmental problems. Notwithstanding, these by-products (biomasses) have a huge potential as source of energy. The objective of this paper is to comprehensively review the latest advances focused on energy production from olive-pruning debris, olive stones and pomaces, including processes such as combustion, gasification and pyrolysis, and the production of biofuels such as bioethanol and biodiesel. Future research efforts required for biofuel production are also discussed. The future of the olive oil industry must move towards a greater interrelation between olive oil production, conservation of the environment and energy generation.

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Section: Pyrolysismentioning

confidence: 99%

Section: Pyrolysismentioning

confidence: 99%

Section: Pyrolysismentioning

confidence: 99%

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Energetic Valorisation of Olive Biomass: Olive-Tree Pruning, Olive Stones and Pomaces

et al. 2020

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“…A literature review showed that studies on pyrolysis of orchard wastes were mainly concerned on olive trees [ 28 , 29 , 30 , 31 ] and vineyard pruning residues [ 32 , 33 , 34 , 35 ]. Because of the insufficient amount of data on pruning residues from the main orchard trees cultivated in the territory of our country (Poland), we focused our study on the production and analysis of the biochars obtained from pruning residues of apple, pear, and plum.…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis of Pruning Residues from Various Types of Orchards and Pretreatment for Energetic Use of Biochar

et al. 2021

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The routine pruning and cutting of fruit trees provides a considerable amount of biowaste each year. This lignocellulosic biomass, mainly in the form of branches, trunks, rootstocks, and leaves, is a potential high-quality fuel, yet often is treated as waste. The results of a feasibility study on biochar production by pyrolysis of residues from orchard pruning were presented. Three types of biomass waste were selected as raw materials and were obtained from the most common fruit trees in Poland: apple (AP), pear (PR), and plum (PL) tree prunings. Two heating rates and three final pyrolysis temperatures were applied. For the slow (SP) and fast pyrolysis (FP) processes, the heating rates were 15 °C/min and 100 °C/min, respectively. The samples were heated from 25 °C up to 400, 500, and 600 °C. Chemical analyses of the raw materials were conducted, and the pyrolysis product yields were determined. A significant rise of higher heating value (HHV) was observed for the solid pyrolysis products, from approximately 23.45 MJ/kg for raw materials up to approximately 29.52 MJ/kg for pyrolysis products at 400 °C, and 30.53 MJ/kg for pyrolysis products at 600 °C. Higher carbon content was observed for materials obtained by fast pyrolysis conducted at higher temperatures.

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“…Similarly to many other agricultural wastes, OP is normally burned in order to recover energy, and the HHV is estimated close to 19.2 MJ/kg [ 28 ]. Until now, OP is evaluated as raw material for gasification [ 29 ], pyrolysis [ 30 ], ethanol production [ 31 ], and so forth, whereas as far as we know there is no report where OP was used for anaerobic digestion. When untreated OP was used the methane yield was relatively low, reaching 56.8 ± 0.3 mL CH 4 /gVS.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of Mediterranean Agricultural Residues as a Potential Feedstock for the Production of Biogas via Anaerobic Fermentation

Nitsos

Μάτσακας

Triantafyllidis

et al. 2015

BioMed Research International

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Hydrothermal, dilute acid, and steam explosion pretreatment methods, were evaluated for their efficiency to improve the methane production yield of three Mediterranean agricultural lignocellulosic residues such as olive tree pruning, grapevine pruning, and almond shells. Hydrothermal and dilute acid pretreatments provided low to moderate increase in the digestibility of the biomass samples, whereas steam explosion enabled the highest methane yields to be achieved for almond shells at 232.2 ± 13.0 mL CH4/gVS and olive pruning at 315.4 ± 0.0 mL CH4/gVS. Introduction of an enzymatic prehydrolysis step moderately improved methane yields for hydrothermal and dilute acid pretreated samples but not for the steam exploded ones.

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The use of waste matter after olive grove pruning for the preparation of charcoal. The influence of the type of matter, particle size and pyrolysis temperature

Cited by 17 publications

References 6 publications

Energetic Valorisation of Olive Biomass: Olive-Tree Pruning, Olive Stones and Pomaces

Energetic Valorisation of Olive Biomass: Olive-Tree Pruning, Olive Stones and Pomaces

Pyrolysis of Pruning Residues from Various Types of Orchards and Pretreatment for Energetic Use of Biochar

Evaluation of Mediterranean Agricultural Residues as a Potential Feedstock for the Production of Biogas via Anaerobic Fermentation

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