Biodiesel production by direct transesterification of wet spent coffee grounds using switchable solvent as a catalyst and solvent

Nguyen, Hoang Chinh; Nguyen, My Linh; Wang, Fuming; Juan, Horng-Yi; Su, Chia‐Hung

doi:10.1016/j.biortech.2019.122334

Cited by 75 publications

(34 citation statements)

References 45 publications

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“…For example, the utilization of SCG for productions of bioethanol, butanol, fertilizers and SCG-based sorbent materials for metal removal has been proposed. [3][4][5][6][7] Spent coffee ground is also used for development of skin-whitening products due to its inhibition of tyrosinase activity and melanin synthesis. [8,9] Sufficient amounts of dietary fiber, protein, lipid, and low glycemic sugars in SCG and acceptable rheological properties of SCG-supplemented dough give rise to its application in biscuit products.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of fatty acids, phenolics and bioactivities of spent coffee grounds prepared from Vietnamese coffee

Huynh

et al. 2021

International Journal of Food Properties

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Spent coffee ground (SCG) is a residue released during coffee brewing. Disposal of SCG is able to lead to a loss of bioactive constituents and have a negative impact upon the environment. This study aimed to explore fatty acids, bioactive phenolics, antioxidant and anti-aging potentials of SCG samples obtained from coffee shops in Ho Chi Minh city, Vietnam. The oil content of the SCG samples ranged from 6.3 to 10.5%, and linoleic (43%), palmitic (33.4%) and oleic (11%) acids were identified as major constituents of the oil. Chlorogenic acid was the most abundant phenolic acid examined (832.9-7657.7 μg/g of dry weight), followed by ferulic acid (40.5-1041.7 μg/ g). Through anti-collagenase and anti-elastase assays, SCG showed a promising anti-aging activity, with IC 50 values comparable with those of epigallocatechin gallate. The correlation analysis revealed gallic acid positively correlated with the free radical scavenging potential evaluated by DPPH (2,2-diphenyl-1-picrylhydrazyl) assay and the inhibitory effect on elastase. The results demonstrated that utilization of SCG prepared from Vietnamese coffee could open new avenues for food and cosmeceutical industry.

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Section: Introductionmentioning

confidence: 99%

Evaluation of fatty acids, phenolics and bioactivities of spent coffee grounds prepared from Vietnamese coffee

Huynh

et al. 2021

International Journal of Food Properties

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“…(Schmidt Rivera et al, 2020). Recently, numerous efforts have been implemented to convert SCG to biofuels, a mixture of monoalkyl esters generated from plants oil or animal fats via transesterification (Le et al, 2017;Mueanmas et al, 2019;Nguyen et al, 2020). The biodiesel produced in this manner consists primarily of two steps: extraction of oil from SCG and transesterification of the extracted oil with short-chain alcohol (Mueanmas et al, 2019).…”

Section: Introductionmentioning

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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“…These oils are rich in long-chain fatty acids (FA), predominantly linoleic acid (C18:2, 24.4-44.1%) and palmitic acid (C16:0, 22-33.6%) [3,[11][12][13]. The use of SCG oils in the production of cosmetics [14] and biodiesel [15][16][17][18][19] has been reported. Moreover, the utilization of SCG or CS oils to produce structured lipids could be a source of revenue for the coffee sector, together with environmental benefits.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Dietetic Structured Lipids from Spent Coffee Grounds Crude Oil Catalyzed by Commercial Immobilized Lipases and Immobilized Rhizopus oryzae Lipase on Biochar and Hybrid Support

et al. 2020

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The aim of this study was the valorization of coffee industry residues, namely spent coffee grounds (SCG) as a source of oil, and silverskin (CS) as a source of both oil and biomass, under the concept of the circular economy. Therefore, crude oil from SCG was used to produce low-calorie structured lipids (SL) for food and pharmaceutical industries, and CS to produce biochar by pyrolysis for biotechnological uses. SL were obtained by acidolysis with caprylic or capric acid, or interesterification with ethyl caprylate or ethyl caprate, in solvent-free media, catalyzed by immobilized sn-1,3 regioselective lipases. Silverskin biochar (BIO) was directly used as enzyme carrier or to produce hybrid organic-silica (HB) supports for enzyme immobilization. Rhizopus oryzae lipase (ROL) immobilized on Amberlite (AMB), silica (SIL), BIO or HB, and the commercial immobilized Thermomyces lanuginosus (Lipozyme TL IM) and Rhizomucor miehei (Lipozyme RM IM) lipases were tested. Lipozyme RM IM showed better results in SL production than Lipozyme TLIM or ROL on BIO, SIL or HB. About 90% triacylglycerol conversion was attained after 7 h acidolysis or interesterification. Lipozyme RM IM was more stable in interesterification (80% and 65% activity with ethyl caprylate or ethyl caprate) than in acidolysis (first-order decay) after 10 reuses.

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Biodiesel production by direct transesterification of wet spent coffee grounds using switchable solvent as a catalyst and solvent

Cited by 75 publications

References 45 publications

Evaluation of fatty acids, phenolics and bioactivities of spent coffee grounds prepared from Vietnamese coffee

Evaluation of fatty acids, phenolics and bioactivities of spent coffee grounds prepared from Vietnamese coffee

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

Synthesis of Dietetic Structured Lipids from Spent Coffee Grounds Crude Oil Catalyzed by Commercial Immobilized Lipases and Immobilized Rhizopus oryzae Lipase on Biochar and Hybrid Support

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