Effect of moisture content on the extraction rate of coffee oil from spent coffee grounds using Norflurane as solvent

Cante, Rosa Colucci; Garella, Isidoro; Gallo, Marianna; Nigro, Roberto

doi:10.1016/j.cherd.2020.11.002

Cited by 13 publications

(7 citation statements)

References 23 publications

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“…Extraction trials were performed by using the lab-scale closed system shown in Figure 1 based on a patented process [35] described by Colucci Cante et al [32,33]. Liquid solvent (Norflurane) was percolated through the matrices placed in an extraction reactor at a flow rate of 100 mL/min and a pressure of 8 bar, enriching with oil and/or carotenoids.…”

Section: Lab-scale Apparatusmentioning

confidence: 99%

“…Colucci Cante et al [32,33] showed the feasibility of extracting lipid fractions from food waste, such as bilberry seeds and spent coffee grounds, respectively, using a hydrofluorocarbon solvent, namely Norflurane, at moderate pressures (5-8 atm). Norflurane or R134a is a haloalkane refrigerant, GRAS ("Generally Recognized As Safe") certified by the FDA ("Federal Food, Drug, and Cosmetic Act").…”

Section: Introductionmentioning

confidence: 99%

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Recovery of Carotenoids from Tomato Pomace Using a Hydrofluorocarbon Solvent in Sub-Critical Conditions

et al. 2022

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The enrichment of oils with nutraceutical bioactive phytomolecules allows the achievement of functional oil-based products of great interest in the food, pharmaceutical, and cosmetic fields. Carotenoids, such as lycopene and β-carotene, are available at a high concentration in tomatoes and tomato waste products, as peels, seeds, and pulp; their recovery is recently attracting growing interest and economic importance in the food industry, and also in consideration of the huge amount of industrial waste produced. The aim of this work is to study the production of an oil functionalized with carotenoids from tomato peels. The extractions were carried out using an innovative process based on the use of commercial Norflurane as solvent in subcritical conditions. Extraction trials were performed on dried tomato peels, with the addition of tomato seeds or wheat germ flour as sources of oily co-solvents, capable of also preserving the biological characteristics of the carotenoids extracted. Although lycopene solubility in Norflurane is quite low, the solvent recirculation and regeneration were allowed to reach a concentration in the oily extracts of approximately 0.3 mg/goil after 2 h of the process. The enrichment in β-carotene was more pronounced, and concentrations of 0.733 mg/goil and 0.952 mg/goil were observed in wheat germ and tomato seed oils, respectively. The results obtained in this study were compared with those obtained by traditional and supercritical CO2 extraction methods.

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Section: Lab-scale Apparatusmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recovery of Carotenoids from Tomato Pomace Using a Hydrofluorocarbon Solvent in Sub-Critical Conditions

et al. 2022

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“…However, the p-value of 0.830 > 0.05 of ANOVA (Table 4) and the 2021) using hexane and the obtained results of this SCG are slightly higher as compared to the extracted SCG oil in the study of Nguyen et al (2020) (12.4%); these higher oils may be contributed by coffee manufacture who put some additives during coffee processing to get a better quality taste. Moreover, the oil content in coffee is still varied by local or kind of coffee (Clarke, 2012;Colucci Cante et al, 2021). Even hexane was the best efficient solvent, but there was no significant difference between these solvents on oil extraction yield; petroleum ether also indicates less environmental impact (Pré Sustainability, 2021).…”

Section: Oil Extractionmentioning

confidence: 99%

Taguchi optimization and life cycle assessment of biodiesel production from spent ground coffee

Bui

Quoc

Duong

et al. 2021

Environ Dev Sustain

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In this study, Vietnamese spent coffee ground (SCG) were subjected to produce biodiesel for fuel application. The extraction processes were conducted with three organic solvents, i.e., hexane, petroleum ether and dimethyl ether. The extraction oil seems to be favored in hexane solvent (17.06%) as compared with petroleum ether (16.62%) and dimethyl ether (16.18%). The extraction processes tend to sufficiently follow the empirical hyperbolic model with R 2 of 0.973, 0.970 and 0.969 for hexane, petroleum ether, and dimethyl ether. The transesterification was optimized using Taguchi design with three variable molar ratios of MeOH and extracted oil (MeOH/EO), catalyst (NaOH) concentration and temperature. The transesterification reached the best yield 76.23% at MeOH of 6:1, NaOH of 0.75 wt% and temperature of 55 °C. Some acquired biodiesel quality was determined within the American Society for Testing and Materials and European standards (EN) norms for biodiesel. Life cycle assessment was also performed to evaluate the impact of the SCG biodiesel production; the industrial process was designed based on laboratory tests aimed with TRACI 2.1 tool. The obtained results indicated that oil extraction is the most effective on biodiesel production, contributing to global warming around 21.04 kg CO 2 eq/kg.

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“…An innovative patented extraction process [20] using hydrofluorocarbon (HFC) Norflurane (1,1,1,2tetrafluoro ethane) as a solvent in subcritical conditions was proposed. The properties of this refrigerant fluid as an extracting solvent for the treatment of vegetable matrices were already investigated; this compound guarantees the recovery of bioactive compounds, such as lycopene and other carotenoids [21], or value-added oils from wet or dried agri-food wastes, such as spent coffee grounds and waste bilberry seeds [22,23].…”

Section: Introductionmentioning

confidence: 99%

“…The problems linked to its contribution as a greenhouse gas can be significantly overcome by a closed extraction system in which the solvent is continuously regenerated and recirculated. Moreover, the use of hydrofluorocarbon solvents in subcritical conditions allows overcoming the need for a drying pre-treatment of the solid matrices [22] and the use of suitable co-solvents aimed at improving the recovery of polar molecules of interest [25], indispensable for other extraction techniques, including sc-CO 2 process.…”

Section: Introductionmentioning

confidence: 99%

Using Hydrofluorocarbon Extracts of Hop in a Pilot Scale Brewing Process

et al. 2022

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In recent years, the use of hop extracts in industrial and home brewing processes as an alternative to hop cones or pellets usually added to wort during boiling has become increasingly popular. These extracts represent concentrated sources of bitter compounds, i.e., α- and β-acids, which are involved in some of the main reactions that take place in the wort and are responsible for the bitterness and the final quality of beer. This work aims at proposing a novel extraction technique, using a hydrofluorocarbon solvent in subcritical conditions; this process provided an extraction yield of 19% and an α-acid recovery of approximately 49% in 120 min of process. The α-acid isomerization kinetics of thermally treated hop extracts were studied and compared with those of both hop pellets and a CO2 extract. Laboratory scale tests showed that shorter boiling times were needed using hydrofluorocarbon and CO2 extracts (approximately 25 min and 34 min, respectively) to reach the same isomerization efficiency of 16.73%, achieved in 50 min of boiling with pellets. Moreover, the process was scaled up and the possibility of considerably reducing the conventional treatment times using hydrofluorocarbon extracts was confirmed: the same isomerization yield (9.1%) obtained after 50 min using the traditional procedure with hop pellets was reached in a shorter time of approximately 35 min in a pilot apparatus.

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Effect of moisture content on the extraction rate of coffee oil from spent coffee grounds using Norflurane as solvent

Cited by 13 publications

References 23 publications

Recovery of Carotenoids from Tomato Pomace Using a Hydrofluorocarbon Solvent in Sub-Critical Conditions

Recovery of Carotenoids from Tomato Pomace Using a Hydrofluorocarbon Solvent in Sub-Critical Conditions

Taguchi optimization and life cycle assessment of biodiesel production from spent ground coffee

Using Hydrofluorocarbon Extracts of Hop in a Pilot Scale Brewing Process

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