Green coffee based CO2 adsorbent with high performance in postcombustion conditions

Plaza, M.G.; González, Ana Silvia; Pevida, C.; Rubiera, F.

doi:10.1016/j.fuel.2014.10.014

Cited by 39 publications

(47 citation statements)

References 56 publications

(102 reference statements)

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“…Under these conditions, CO2 capacities fall to the range of 0.7-1.2 mmol/g. It is worthy to highlight that these values are still higher or equal than those reported from some commercial carbon-based adsorbents, i.e., Norit R2030 CO2 (Plaza et al, 2015), BPL (Chue et al, 1995), Norit AC 1 Extra (Dreisbach et al, 1999), BrightblackTM (Hornbostel et al, 2013), or VR-5-M (Wahby et al, 2010), very similar to some carbon fiber composites obtained by petroleum pith (Thiruvenkatachari et al, 2013), or even to other attractive adsorbents such as some MOFs (Krishna and Van Baten, 2012;Li et al, 2012;Sabouni et al, 2013;Xu et al, 2013;Xian et al, 2015) and zeolites (Hefti et al, 2015), tested under similar operating conditions. In addition, it should be kept in mind that these materials would present the added value of having being prepared by valorization of highly available underutilized biomass residues and using much more inexpensive, straightforward, and easy to scale-up procedures.…”

Section: Adsorption Equilibrium Studiesmentioning

confidence: 73%

Biomass Waste Carbon Materials as adsorbents for CO2 Capture under Post-Combustion Conditions

et al. 2016

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A series of porous carbon materials obtained from biomass waste have been synthesized, with different morphologies and structural properties, and evaluated as potential adsorbents for CO2 capture in post-combustion conditions. These carbon materials present CO2 adsorption capacities, at 25°C and 101.3 kPa, comparable to those obtained by other complex carbon or inorganic materials. Furthermore, CO2 uptakes under these conditions can be well correlated with the narrow micropore volume, derived from the CO2 adsorption data at 0°C ( ) V CO 2 DR . In contrast, CO2 adsorption capacities at 25°C and 15 kPa are more related to only pores of sizes lower than 0.7 nm. The capacity values obtained in column adsorption experiments were really promising. An activated carbon fiber obtained from Alcell lignin, FCL, presented a capacity value of 1.3 mmol/g (5.7%wt). Moreover, the adsorption capacity of this carbon fiber was totally recovered in a very fast desorption cycle at the same operation temperature and total pressure and, therefore, without any additional energy requirement. Thus, these results suggest that the biomass waste used in this work could be successfully valorized as efficient CO2 adsorbent, under post-combustion conditions, showing excellent regeneration performance.

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Section: Adsorption Equilibrium Studiesmentioning

confidence: 73%

Biomass Waste Carbon Materials as adsorbents for CO2 Capture under Post-Combustion Conditions

et al. 2016

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“…A wide range of precursors have been reported for carbon foam synthesis including coal [5][6][7] , coke [8,9] , pitch [6,[10][11][12][13][14][15] , polymer [16][17][18][19] and biomass [20][21][22][23] . Of these materials, bituminous tar pitch and coal tar pitch are some of the most commonly used carbon precursors because pitch is already used in more-conventional activated carbon production processes, low cost pitch is widely available from the petrochemicals industry, and pitch has a high carbon content [24].…”

Section: Introductionmentioning

confidence: 99%

The preparation of activated carbon discs from tar pitch and coal powder for adsorption of CO 2 , CH 4 and N 2

Gao

Rufford

et al. 2017

Microporous and Mesoporous Materials

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We used a pitch foaming process to prepare high surface area activated carbon discs ACD with a relatively high mechanical strength (4.3 MPa) from mixtures of tar pitch and coal powders, with potassium hydroxide as a chemical activator. The two primary parameters investigated in this study were the amount of nitric acid used in the pitch pre-treatment and the size of the coal particles (0 -53 µm, 150 -250 µm, and 355 -550 µm). The pre-treatment of the pitch was observed to be critical in the production of the carbon discs and in this study the preferred ratio of 15 M nitric acid to pitch in weight was 17/100. The coal size of 0 -53 µm produced the activated carbon discs with the highest gas adsorption capacity, which we attribute to the stabilization of the pitch foaming process. Equilibrium adsorption capacities of CO 2 , N 2 , and CH 4 on the carbons were measured by a gravimetric sorption method at pressures up to 3500 kPa. At 298 K the adsorption capacities of carbon foam disc prepared with coal particle size of 0 -53 µm and pitch pre-treated with 18 ml HNO 3 per 100 g pitch were 3.08 mol/kg N 2 , 5.48 mol/kg CH 4 and 8.88 mol/kg CO 2 at about 3500 kPa.

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“…Adsorption is one of the separation technologies that are being considered for CO 2 capture applications . Carbon adsorbents with a low carbon footprint can be produced at a low cost from renewable and globally available sources (e.g.…”

Section: Introductionmentioning

confidence: 99%

Sustainable coffee‐based CO₂ adsorbents: toward a greener production via hydrothermal carbonization

et al. 2017

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Activated carbons for adsorption of CO2 under flue gas conditions were prepared by means of hydrothermal carbonization (HTC) and subsequent CO2 activation of spent coffee grounds. The HTC of the samples consisted of their heating at moderate temperature with a high water content in autoclave. A preliminary screening concluded that 1:2 biomass/water ratio (spent coffee grounds as received) and no chemicals added during HTC with further activation in CO2 at 800°C for 1 h are suitable conditions to produce the CO2 adsorbents. In addition, the response surface methodology (RSM) successfully evaluated the combined effect of HTC temperature and dwell time, to maximize the CO2 capture capacity within the experimental region. Both the lowest temperature and dwell time (120°C, 3 h) resulted in the maximum CO2 capture capacity (2.95 wt.%). Two activated carbons (ACs) were then produced: one via hydrothermal carbonization optimized by means of response surface methodology (RSM) followed by CO2 activation (HC‐Co) and the other one by single‐step CO2 activation as described in the Group's patent ES2526259 (AC‐Co). Analysis of the features and performances of the two ACs revealed superior chemical and textural characteristics on HC‐Co for CO2 adsorption under post‐combustion capture conditions; HTC process is the sole responsible of this enhancement. Moreover, the proposed methodology to produce CO2 adsorbents from spent coffee grounds represents a more energy‐efficient approach. © 2017 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Green coffee based CO2 adsorbent with high performance in postcombustion conditions

Cited by 39 publications

References 56 publications

Biomass Waste Carbon Materials as adsorbents for CO2 Capture under Post-Combustion Conditions

Biomass Waste Carbon Materials as adsorbents for CO2 Capture under Post-Combustion Conditions

The preparation of activated carbon discs from tar pitch and coal powder for adsorption of CO 2 , CH 4 and N 2

Sustainable coffee‐based CO₂ adsorbents: toward a greener production via hydrothermal carbonization

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Green coffee based CO2 adsorbent with high performance in postcombustion conditions

Cited by 39 publications

References 56 publications

Biomass Waste Carbon Materials as adsorbents for CO2 Capture under Post-Combustion Conditions

Biomass Waste Carbon Materials as adsorbents for CO2 Capture under Post-Combustion Conditions

The preparation of activated carbon discs from tar pitch and coal powder for adsorption of CO 2 , CH 4 and N 2

Sustainable coffee‐based CO2 adsorbents: toward a greener production via hydrothermal carbonization

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Sustainable coffee‐based CO₂ adsorbents: toward a greener production via hydrothermal carbonization