Spent coffee-based activated carbon: Specific surface features and their importance for H2S separation process

Kante, Karifala; Nieto-Delgado, César; Rangel-Mendez, J. Rene; Bandosz, Teresa J.

doi:10.1016/j.jhazmat.2011.11.053

Cited by 114 publications

(48 citation statements)

References 20 publications

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“…The main premises in favor of undertaking the adsorption study toward gas pollutants of acidic nature were the high content of mineral substance in the activated carbons structure as well as the presence of a high number of basic surface functional groups, which, according to previous literature reports, have a positive impact on the effectiveness of removal of this type of pollution (Yuan and Bandosz 2007;Feng et al 2005;Nowicki et al 2013Nowicki et al , 2014Kante et al 2012). To verify this supposition, all the materials prepared were subjected to adsorption tests in four variants.…”

Section: Sorption Abilities Of the Activated Carbons Toward Nitrogen mentioning

confidence: 99%

The effect of mineral matter on the physicochemical and sorption properties of brown coal-based activated carbons

Nowicki

2015

Adsorption

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A series of new carbonaceous adsorbents has been obtained by means of direct and physical activation of Polish brown coal, characterised by high mineral matter content. The influence of activation procedure on the porous structure development, acidic and basic surface groups generation as well as the sorptive properties of the adsorbents prepared toward liquid and gas pollutants was tested. Additionally the effect of mineral matter presence on the physicochemical and sorption properties of materials prepared was studied. The final products were micro/mesoporous activated carbons of medium developed surface area ranging from 407 to 674 m 2 /g, showing strongly basic or intermediate acidic-basic character of the surface. The results obtained during this study showed that direct and physical activation of low quality brown coal led to activated carbons with very good sorption capacity both toward gas contamination of acidic character (especially nitrogen dioxide) as well as toward methylene blue and inorganic pollutants of molecules of size similar to that of iodine molecules. It was also proved that demineralization of prepared activated carbons by hydrochloric acid significantly reduced their ability to toxic gases sorption, but simultaneously increased the efficiency of removing impurities from the liquid phase.

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Section: Sorption Abilities Of the Activated Carbons Toward Nitrogen mentioning

confidence: 99%

The effect of mineral matter on the physicochemical and sorption properties of brown coal-based activated carbons

Nowicki

2015

Adsorption

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“…The disposal of the GCW should be properly managed in order to turn it into value-added products. GCW has been used for biofuel production [4], as source of sugar [5], as precursor for production of activated carbon [6,7], as compost [8], and as absorbent for metal ions removal [9]. Previous work done on modified ground coffee waste showed enhancement of mechanical properties compared to untreated ground coffee waste composite [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Alkaline Treatment and Fiber Content on the Physical, Thermal, and Mechanical Properties of Ground Coffee Waste/Oxobiodegradable HDPE Biocomposites

Tan

Kuan

Lee

2017

International Journal of Polymer Science

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Effect of alkali treatment on ground coffee waste/oxobiodegradable HDPE (GCW/oxo-HDPE) composites was evaluated using 5%, 10%, 15%, and 20% volume fraction of GCW. The composites were characterized using structural (Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM)), thermal (thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC)), mechanical (tensile and impact test) properties, and water absorption. FTIR spectrum indicated the eradication of lipids, hemicellulose, lignin, and impurities after the treatments lead to an improvement of the filler/matrix interface adhesion. This is confirmed by SEM results. Degree of crystallinity index was increased by 5% after the treatment. Thermal stability for both untreated and treated GCW composites was alike. Optimum tensile result was achieved when using 10% volume fraction with enhancement of 25% for tensile strength and 24% for tensile modulus compared to untreated composite. Specific tensile strength and modulus had improved as the composite has lower density. The highest impact properties were achieved when using 15% volume fraction that lead to an improvement of 6%. Treated GCW composites show better water resistance with 57% improvement compared to the untreated ones. This lightweight and ecofriendly biocomposite has the potential in packaging, internal automotive parts, lightweight furniture, and other composite engineering applications.

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“…Some of these proposals are the use of SCG for animal feed [14], for producing organic compost [15], as fuel pellets [16] or the production of active carbon [17]. In addition, the potential of SCG as raw material for the extraction of natural antioxidants [18] the production of ethanol [19], biodiesel [20] or polyhydroxyalkanoates (PHA) [21] have been investigated in the last years.…”

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confidence: 99%

Green composites based on polypropylene matrix and hydrophobized spend coffee ground (SCG) powder

Garcia‐Garcia

Carbonell

Samper

et al. 2015

Composites Part B: Engineering

146

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Green composites were prepared with polypropylene matrix and 20 wt.% spent coffee ground (SCG) powder for uses as a wood plastic composite (WPC). The effects of hydrophobic treatment with palmitoyl chloride on SCG powder is compared with conventional surface treatment based on silanization with (3-glycidyloxypropyl) trimethoxysilane and the use of a maleated copolymer compatibilizer (polypropylene-graft-maleic anhydride, PP-g-MA) in terms of mechanical properties, morphology, thermal properties and water uptake. Composites were previously mixed in a twin-screw co-rotating extruder and subsequently subjected to injection moulding. The comparative effect of the different surface treatments and or compatibilizers on mechanical performance was studied by flexural, impact tests and dynamic mechanical thermal analysis (DMTA-torsion); in addition, the stabilizing effect of SCG was revealed by differential scanning calorimetry (DSC) and thermogravymetric analysis (TGA). As one of the main drawbacks of wood plastic composites and natural fiber reinforced plastics is the moisture gain, water uptake tests were carried out in order to quantify the effectiveness of the hydrophobization process with palmitoyl chloride. Results show a slight increase in flexural modulus for composites with both untreated and treated/compatibilized SCG powder (20 wt.%).As expected, thermal stability is improved as indicated by an increase of more than 8% in the

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Spent coffee-based activated carbon: Specific surface features and their importance for H2S separation process

Cited by 114 publications

References 20 publications

The effect of mineral matter on the physicochemical and sorption properties of brown coal-based activated carbons

The effect of mineral matter on the physicochemical and sorption properties of brown coal-based activated carbons

Characterization of Alkaline Treatment and Fiber Content on the Physical, Thermal, and Mechanical Properties of Ground Coffee Waste/Oxobiodegradable HDPE Biocomposites

Green composites based on polypropylene matrix and hydrophobized spend coffee ground (SCG) powder

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