Defatted spent coffee grounds fast pyrolysis polygeneration system: Lipid extraction effect on energy yield and products characteristics

Bartolucci, L.; Cordiner, S.; Mele, P.; Mulone, V.

doi:10.1016/j.biombioe.2023.106974

Cited by 10 publications

(4 citation statements)

References 41 publications

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“…OD, 1.0 mm ID 19808) and a TCD sensor. The GC method was attended is reported and the other speci cs are reported in pur previous study [30]. The only peaks identi ed and measured were associated to H2, N2, O2, CH4, CO and CO2…”

Section: Products Characterizationmentioning

confidence: 99%

“…Standard deviation calculated on the 3 most signi cant test. Further speci cation of the experimental set-up can be found in our previous study [30].…”

Section: Experimental Set-upmentioning

confidence: 99%

“…L.Bartolucci et al evaluated the conversion e ciency of spent coffee grounds fast pyrolysis in the temperature range of 350-550°C with a screw-type pyrolysis reactor. They demonstrated an ERR of 67% maximized 400 ° C, disregarding the energy contribution of the aqueous fraction of pyrolysis oil to the energy yield[30]. H. Cong et al carried out the slow pyrolysis of corn stover in a horizontal screw conveyor pyrolyzer.…”

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confidence: 99%

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Intermediate pyrolysis of hazelnut shell: temperature effect on energy conversion and products characteristics

Bartolucci,

Cordiner,

Kumar

et al. 2024

Preprint

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Residual biomass is a renewable and clean energy source that is expected to play a crucial role in the energy transition. Thermochemical valorization of agro-industrial waste represents a promising alternative, which is still requiring further investigation with regard to the economical sustainability. In this study, intermediate pyrolysis of hazelnut shell was performed employing a laboratory scale screw-type reactor, evaluating the impact of temperature on the mass and energy flows of the process. The results show that temperature has a significant impact on the liquid and non-condensable gas yields, whilst biochar yield remains stable in the range of 18-23 w/w %. Pyrolysis condensates spontaneously split into organic and aqueous fractions and have calorific value of 18.1-18.5 MJ/kg and 1.9-3.2 MJ/kg, respectively. GC-MS analysis revealed that aromatic compounds dominate the organic fraction, while acetic acid is very abundant in the water-phase (125-147 g/L), suggesting attracting the potential recovery of chemicals. The carbon conversion efficiency for intermediate pyrolysis is around 90% and the theoretical energy recovery ratio is maximized at 76.6 % at 500 ° C. Moreover, the energy recovery ratio is rather high 72-76 % in the temperature range explored, showing that intermediate pyrolysis may adapt effectively to changes in temperature.

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Section: Products Characterizationmentioning

confidence: 99%

“…Standard deviation calculated on the 3 most signi cant test. Further speci cation of the experimental set-up can be found in our previous study [30].…”

Section: Experimental Set-upmentioning

confidence: 99%

mentioning

confidence: 99%

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Intermediate pyrolysis of hazelnut shell: temperature effect on energy conversion and products characteristics

Bartolucci,

Cordiner,

Kumar

et al. 2024

Preprint

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“…Due to the complexity in biomass composition and the multiphase reactions involved in the pyrolysis process, a full understanding of the associated chemical reaction pathways is challenging. Previous studies have used characteristic biomass compounds like cellulose (Hu et al, 2022;Fliri et al, 2023;Shao et al, 2023), hemicellulose (D. Chen et al, 2022;Hu et al, 2024), lignin (Folgueras et al, 2023;Genuino et al, 2023;Pienihäkkinen et al, 2023), lipid (Bartoli et al, 2021;Bartolucci et al, 2023), protein, and their monomers like glucose, xylose, phenol (Lago et al, 2022;Cruz-Reina et al, 2023), and amino acids in either individual, binary, or tertiary systems to study the underlying reaction mechanism. Past review papers have been previously reported by (Osatiashtiani et al, 2022;Al-Balushi et al, 2023;Sierra et al, 2023;Silos-Llamas et al, 2023;Xing et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Critical review of the role of ash content and composition in biomass pyrolysis

Puri,

Hu,

Naterer

2024

Front. Fuels

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In the face of environmental challenges (e.g., dramatically increasing greenhouse gas emissions and climate change), it is utmost of importance to sustainable energy systems. Biomass consisting of agricultural and forest waste, municipal solid waste, and aquatics, has been identified as alternative and promising fuel sources. Thermochemical conversion approaches like pyrolysis can turn various types of biomass into three valuable product streams, namely, bio-oil, biochar, and syngas. To date, past review articles have considered the major operating parameters of kinetics, chemistry, and the application of pyrolysis products. However, ash content is one of the key biomass components that lacks investigation on its influence during biomass pyrolysis with respect to products yield and properties. This review article examines: i) the ash content and composition in different types of biomass; ii) effects of ash content on catalytic pathway and biomass thermal degradation; iii) ash related problems in the thermal degradation of biomass; and iv) available deashing techniques for biomass. The review aims to provide new understandings and insights regarding the effects of ash content and composition on biomass pyrolysis.

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Sustainable management of spent coffee grounds: applications, decompositions techniques and structural analysis

Saxena,

Laddha,

Bhoi

2024

J Mater Cycles Waste Manag

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Defatted spent coffee grounds fast pyrolysis polygeneration system: Lipid extraction effect on energy yield and products characteristics

Cited by 10 publications

References 41 publications

Intermediate pyrolysis of hazelnut shell: temperature effect on energy conversion and products characteristics

Intermediate pyrolysis of hazelnut shell: temperature effect on energy conversion and products characteristics

Critical review of the role of ash content and composition in biomass pyrolysis

Sustainable management of spent coffee grounds: applications, decompositions techniques and structural analysis

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