Pyrolysis of household coffee vis-à-vis tea waste: A detailed insight into physicochemical properties, kinetics, and thermodynamics study

Chavhan, Madhav P.; Slovák, Václav; Siddiqi, Hammad; Mucha, Martin

doi:10.1016/j.ceja.2024.100587

Cited by 3 publications

(4 citation statements)

References 41 publications

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“…• The sharp bands at 2800-3000 cm −1 can be assigned to stretch vibrations of the C-H bond in the saturated hydrocarbons. These strong absorptions in the SCG spectrum have been assumed due to the presence of components other than cellulose, hemicellulose and lignin molecules [44]. These bands disappeared in the AC spectrum, probably indicating their decomposition during pyrolysis.…”

Section: Structural Characterizationmentioning

confidence: 93%

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Activated Carbon Prepared from Waste Coffee Grounds: Characterization and Adsorption Properties of Dyes

Aouay,

Attia,

Dammak

et al. 2024

Materials

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Spent coffee grounds (SCGs) have great potential as a useful, value-added biological material. In this context, activated carbon (AC) was prepared from SCGs by an activation process using H3PO4 at 600 °C in the air and used as an adsorbent for the azo dye AO7, a model molecule for dye colorants found in textile industry effluents. X-ray diffraction, SEM and BET revealed that the AC was predominantly amorphous, consisting of a powder of 20–100 µm particles with mesopores averaging 5.5 nm in pore size. Adsorption kinetics followed a pseudo-second-order law, while the Langmuir model best fitted the experimental isotherm data (maximum capacity of 119.5 mg AO7 per AC g). The thermodynamic parameters revealed that adsorption was endothermic and spontaneous. All the characterizations indicated that adsorption occurred by physisorption via mainly π–π interactions. The best experimental removal efficiency optimized by means of a Box–Behnken design and response surface methodology was 98% for an initial AO7 concentration of 20 mg·L−1 at pH 7.5 with a dose of 0.285 g·L−1 of AC and a contact time of 40 min. These results clearly show that activated carbon prepared from SCGs can be a useful material for efficiently removing organic matter from aqueous solutions.

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Section: Structural Characterizationmentioning

confidence: 93%

“…The raw SCG mixture and the AC produced were compared using the FTIR technique to highlight the change in characteristic functional groups during activation (Figure 1a,b). The following band assignments were made based on the data found in the literature [43][44][45]:…”

Section: Chemical Group Analysismentioning

confidence: 99%

Activated Carbon Prepared from Waste Coffee Grounds: Characterization and Adsorption Properties of Dyes

Aouay,

Attia,

Dammak

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

Section: Chemical Group Analysismentioning

confidence: 99%

“…The sharp bands at 2800-3000 cm -1 can be assigned to stretch vibrations of the C-H bond in the saturated hydrocarbons. These strong absorptions in the SCG spectrum has been assumed to be due to the presence of components other than cellulose, hemicellulose and lignin molecules [33]. These bands disappeared in the AC spectrum probably indicating their decomposition during pyrolysis.…”

mentioning

confidence: 99%

Activated Carbon Prepared from Waste Coffee Grounds: Characterization and Adsorption Properties of Dyes

Aouay,

Afef,

Damak

et al. 2024

Preprint

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Spent coffee grounds (SCG) have great potential as a useful, value-added biological material. In this context, activated carbon (AC) was prepared from SCG by an activation process using H3PO4 at 600°C in air and used as an adsorbent for the azo dye AO7, a model molecule for dye colorants found in textile industry effluents. X-ray diffraction, SEM and BET revealed that the AC was predominantly amorphous, consisting of a powder of 20-100 µm particles with mesopores averaging 5.5 nm in pore size. Adsorption kinetics followed a pseudo-second-order law, while the Langmuir model best fitted experimental isotherm data (maximum capacity of 119.5 mg AO7 per AC g). Thermodynamic parameters revealed that adsorption was endothermic and spontaneous. All the characterizations indicated that adsorption occurred by physisorption via mainly - interactions. The best experimental removal efficiency optimized by means of a Box-Behnken design and response surface methodology was 98% for an initial AO7 concentration of 20 mg.L-1 at pH 7.5 with a dose of 0.285 g.L-1 of AC and a contact time of 40 min. These results clearly show that activated carbon prepared from SCG can be a useful material for efficiently removing organic matter from aqueous solutions.

show abstract

Insights into catalytic co-pyrolysis of spent coffee grounds and high density polyethylene (HDPE) using acid mine drainage (AMD) treated sludge based catalyst: Analysis of kinetics, mechanism and thermodynamic properties

Bhushan,

Hooda,

Chitransh

et al. 2024

Sustainable Chemistry for Climate Action

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Pyrolysis of household coffee vis-à-vis tea waste: A detailed insight into physicochemical properties, kinetics, and thermodynamics study

Cited by 3 publications

References 41 publications

Activated Carbon Prepared from Waste Coffee Grounds: Characterization and Adsorption Properties of Dyes

Activated Carbon Prepared from Waste Coffee Grounds: Characterization and Adsorption Properties of Dyes

Activated Carbon Prepared from Waste Coffee Grounds: Characterization and Adsorption Properties of Dyes

Insights into catalytic co-pyrolysis of spent coffee grounds and high density polyethylene (HDPE) using acid mine drainage (AMD) treated sludge based catalyst: Analysis of kinetics, mechanism and thermodynamic properties

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