Valorization of olive oil industry subproducts: ash and olive pomace fast pyrolysis

Alcazar-Ruiz, A.; Garcia-Carpintero, R.; Dorado, Fernando; Sánchez-Silva, L.

doi:10.1016/j.fbp.2020.10.011

Cited by 30 publications

(15 citation statements)

References 48 publications

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“…Alcazar-Ruiz et al 2021).The CHN-O elemental composition of studied OPW reveals high carbon and hydrogen contents(C 47.3 wt.% and H 6.6 wt.%, respectively) which are comparable to those reported in previous studies((Khalideh Al bkoor Alrawashdeh et al 2017;Dorado et al 2021), Table1). The OPW nitrogen content is relatively high compared to other lignocellulosic biomass indicating the potential use of the residual pyrolytic char as nutrient-rich fertilizer.…”

supporting

confidence: 89%

“…and alkaline-earth metals (Mg, Ca, etc.) could have acted as catalysts during thermal process (Dinc and Yel 2018;Alcazar-Ruiz et al 2021). While studying the effect of inorganic metals (K, Mg and Ca) on thermal degradation of lignocellulosic biomass, reported that the K contained in the lignocellulosic biomass has a catalytic effect by favoring solid char formation and by decreasing bio-oil yield, whereas Mg and Ca have some effects on the biomass degradation rate.…”

Section: 1opw Characteristicsmentioning

confidence: 99%

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Sustainable Valorization of Olive Pomace Waste to Renewable Biofuels, Biomaterials and Biochemicals Via Pyrolysis Process: Experimental and Numerical Investigation

Aissaoui

Trabelsi²,

Bensidhom³

et al. 2021

Preprint

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This work demonstrates, experimentally and numerically, the potential of Olive Pomace Waste (OPW) to produce renewable biofuels (pyrolytic oil and gas), bio-chemicals (tars as source of bioactive molecules) and bio-fertilizers (chars) through slow pyrolysis. Experimental pyrolysis runs were conducted at 500, 600 and 700°C as final pyrolysis temperature, 15, 20 and 25°C/min as heating rate and 1h as residence time, in a fixed bed pyrolyzer. In the optimum pyrolysis conditions (600°C and 15°C/min), 33 wt.% of oil, 30.00 wt.% of char and 37 wt.% of gas were produced. Recovered pyrolytic oil presents good energy value (HHV between 15.96 and 20.94 MJ/kg) with a great bioactive potential. The released permanent gases show an interesting energy content (LHV up to 11 MJ/Kg) which emphasizes their application in a gas engine to provide renewable electricity in rural olive groves area. The recovered OPW biochar presents a high carbon (C 72.54 wt.%) and nutrients contents (up to 8.42 mg/g of Ca, up to 8.69 mg/g of K and up to 2.02 % of total N) which make it suitable for soil amendment and for long-term carbon sequestration. Kinetic study of OPW pyrolysis, performed using the Distributed Activation Energy Model (DAEM), gives an activation energy values ranging from 121.6 to 151.6 kJ/mol. The investigation of the OPW thermal behavior and reactivity under pyrolysis conditions is useful approach to design and operate slow pyrolysis process at commercial scale, which could be useful by farmers for OPW in olive fields.

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supporting

confidence: 89%

Section: 1opw Characteristicsmentioning

confidence: 99%

Sustainable Valorization of Olive Pomace Waste to Renewable Biofuels, Biomaterials and Biochemicals Via Pyrolysis Process: Experimental and Numerical Investigation

Aissaoui

Trabelsi²,

Bensidhom³

et al. 2021

Preprint

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“…This could have been due to the much lower content of K inherent in NS (0.81 wt% versus 3.89 wt% in OP), a metal highly active as a catalyst for lignin decomposition. In NS_5, excess NaCl seemed to promote cracking and deoxygenation reactions, thus limiting formation of phenolic compounds and favoring formation of low molecular weight compounds (LMW) 40 . The result was a higher proportion of alkanes and light oxygenates.…”

Section: Resultsmentioning

confidence: 99%

Catalytic effect of alkali and alkaline earth metals on fast pyrolysis pre‐treatment of agricultural waste

Alcazar-Ruiz¹,

Sánchez-Silva²,

Dorado³

2021

Biofuels Bioprod Bioref

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The catalytic effect of mineral components (K, Ca, Mg and Na), after pre‐treatment by water leaching and adding NaCl, was evaluated in fast pyrolysis with the biomass of four types of agricultural waste (olive pomace, nutshell, almond shell, and pistachio shell). Water leaching proved to be effective at reducing mineral content in the raw materials, especially in terms of removing K. As a consequence, there was lower decarboxylation activity during fast pyrolysis, and a lower yield of phenolic compounds was obtained. The effect of adding NaCl was evaluated by varying its ratio in the blend (1, 3 and 5 wt%) and it promoted cracking and dehydration reactions, favoring the formation of light molecular‐weight compounds as carboxylic acids. © 2021 The Authors. Biofuels, Bioproducts and Biorefining published by Society of Industrial Chemistry and John Wiley & Sons Ltd.

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“…Among various thermochemical processes, gasification and pyrolysis are at present the most viable thermal options for producing sustainable energy in the future by replacing fossil fuels with high quality biofuels. Pyrolysis is a direct process towards the production of high quality biofuel (Alcazar-Ruiz et al, 2021). In contrast, gas production is enhanced via gasification using a gasification agent.…”

Section: Introductionmentioning

confidence: 99%

Gasification versus fast pyrolysis bio-oil production: A life cycle assessment

Alcazar-Ruiz

Dorado

Sánchez-Silva

2022

Journal of Cleaner Production

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Valorization of olive oil industry subproducts: ash and olive pomace fast pyrolysis

Cited by 30 publications

References 48 publications

Sustainable Valorization of Olive Pomace Waste to Renewable Biofuels, Biomaterials and Biochemicals Via Pyrolysis Process: Experimental and Numerical Investigation

Sustainable Valorization of Olive Pomace Waste to Renewable Biofuels, Biomaterials and Biochemicals Via Pyrolysis Process: Experimental and Numerical Investigation

Catalytic effect of alkali and alkaline earth metals on fast pyrolysis pre‐treatment of agricultural waste

Gasification versus fast pyrolysis bio-oil production: A life cycle assessment

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