Solid biofuel production from spent coffee ground wastes: Process optimisation, characterisation and kinetic studies

Lee, Xin Jiat; Ong, Hwai Chyuan; Gao, Wei; Ok, Yong Sik; Chen, Wei‐Hsin; Goh, Brandon Han Hoe; Chong, Cheng Tung

doi:10.1016/j.fuel.2021.120309

Cited by 36 publications

(5 citation statements)

References 53 publications

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“…mol −1 . In this study, the average values of activation energy calculated by both the OFW and the KAS methods were similar to previous studies where the activation energy values were 196.08 and 197.26 kJ.mol −1 for SCGs from OFW and KAS methods [47]. Overall, all kinetic parameters calculated by the two methods were in good compliance with each other and could be used to simulate the decomposition process under a specific condition.…”

Section: Determination Of Activation Energysupporting

confidence: 86%

Silver adsorption on biochar produced from spent coffee grounds: validation by kinetic and isothermal modelling

Islam

Parvin

Dada

et al. 2022

Biomass Conv. Bioref.

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This study investigates silver adsorption on biochar produced from pyrolysis of spent coffee grounds (SCGs). Biochars were produced from SCGs at temperatures between 500 and 1000 °C. SCG-derived biochars were then characterised by different analytical methods, such as Brunauer-Emmet-Teller (BET), Fourier transform infrared (FTIR), X-ray diffraction (XRD), and investigated for silver removal. The results revealed that the biochar produced at 500 °C offered a maximum surface area of 40.1 m2/g with a yield of 23.48% biochar and the highest silver adsorption capacity of 49.0 mg/g with 99.9% silver removal efficiency. The morphology of adsorbed silver on biochar was determined using scanning electron microscopy–energy-dispersive spectrometry (SEM–EDS), and XRD analyses, which showed an even distribution of silver on the biochar surface. Furthermore, X-ray photoelectron spectroscopy (XPS) confirmed that part of the silver ions was reduced to form metallic silver (Ag0)/silver nanoparticles (Ag NPs) during adsorption. The kinetics and isothermal evaluation suggested that silver adsorption was dominated by the pseudo-second-order model and Langmuir isotherm, which means that silver adsorption was mainly dominated by chemisorption and monolayer on biochar surface. Overall, this study suggests that 500 °C was the most feasible pyrolysis temperature to produce SCG-derived biochar with suitable physicochemical properties that can efficiently adsorb silver species from wastewater. Graphical Abstract

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Section: Determination Of Activation Energysupporting

confidence: 86%

Silver adsorption on biochar produced from spent coffee grounds: validation by kinetic and isothermal modelling

Islam

Parvin

Dada

et al. 2022

Biomass Conv. Bioref.

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show abstract

“…It affects the high amount of spent coffee grounds production every day. It was provided that the spent coffee grounds are rich in fatty acids, amino acids, lignin, polysaccahrides, polyphenols, tannins, and flavonoids, thus making this feedstock a potential substate for biofuel production, adsorbents, and chemical production [18][19][20]. There are some examples of investigations on the treatment and application of spent coffee grounds: (i) valorisation of SCG in solid biomass fuel in the form of briquettes using xanthan gum under low temperature and low pressure conditions [21]; (ii) gasification of SCG which gave good results and demonstrated the high energy potential of this material [22]; (iii) polyhydroxyalkanoates (chemical industry) [23].…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis of Biomass Wastes into Carbon Materials

et al. 2022

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This study presents the results of the biomass pyrolysis process focusing on biochar production and its potential energetic (as solid fuel) and material (as adsorbent) applications. Three kinds of biomass waste were investigated: wheat straw, spent coffee grounds, and brewery grains. The pyrolysis process was carried out under nitrogen atmosphere at 400 and 500 °C (residence time of 20 min). A significant increase in the carbon content was observed in the biochars, e.g., from 45% to 73% (at 400 °C) and 77% (at 500 °C) for spent coffee grounds. In addition, the structure and morphology were investigated using scanning electron microscopy. Thermal properties were studied using a simultaneous thermal analysis under an oxidising atmosphere. The chemical activation was completed using KOH. The sorption properties of the obtained biochars were tested using chromium ion (Cr3+) adsorption from liquid solution. The specific surface area and average pore diameter of each sample were determined using the BET method. Finally, it was found that selected biochars can be applied as adsorbent or a fuel. In detail, brewery grains-activated carbon had the highest surface area, wheat straw-activated carbon adsorbed the highest amount of Cr3+, and wheat straw chars presented the best combustion properties.

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“…They analyzed an integrated system consisting of a single supplier, a manufacturer, a retailer, and a third party. Lee et al [29] discussed the benefit of carbon emissions during manufacturing and transportation. Multi-objective optimization in logistics problem for multi-product supply chain network model was introduced by Gupta et al [18].…”

Section: Closed-loop Supply Chain Managementmentioning

confidence: 99%

Technology license sharing strategy for remanufacturing industries under a closed-loop supply chain management bonding

et al. 2022

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Remanufacturing is getting attention nowadays due to increasing waste and corresponding emissions. One of the important factors of remanufacturing is the quality of the remanufactured products. The collection and distribution of used products require proper management. Based on this situation, this study discusses a hybrid closed-loop supply chain management in cooperation with a hybrid production system. The vendor comes up with the policy of sharing remanufacturing responsibility by sharing the technology license with other supply chain players. The carbon cap restricts emissions from the entire hybrid production system of the vendor. Other factors of this proposed study are service by the retailer and quality, gift policy, and customer awareness by the vendor. This study examines the scenario under random market demand. Classical optimization provides the solution under the Stackelberg game policy where the vendor acts as leader and the retailer & third party act as followers. This paper considers two scenarios: Scenario A for a continuous distribution and Scenario B for no specific distribution. A comparison is drawn between various motivating factors-based policies to control supply chain management.

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Solid biofuel production from spent coffee ground wastes: Process optimisation, characterisation and kinetic studies

Cited by 36 publications

References 53 publications

Silver adsorption on biochar produced from spent coffee grounds: validation by kinetic and isothermal modelling

Silver adsorption on biochar produced from spent coffee grounds: validation by kinetic and isothermal modelling

Pyrolysis of Biomass Wastes into Carbon Materials

Technology license sharing strategy for remanufacturing industries under a closed-loop supply chain management bonding

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