3D-printed activated carbon for post-combustion CO2 capture

Zafanelli, Lucas F.A.S.; Henrique, Adriano; Steldinger, Hendryk; Tuesta, Jose L. Díaz de; Gläsel, Jan; Rodrigues, Alírio E.; Gomes, Helder; Etzold, Bastian J. M.; Silva, José A.C.

doi:10.1016/j.micromeso.2022.111818

Cited by 18 publications

(6 citation statements)

References 35 publications

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“…A lab-scale system was assembled to run adsorption tests, to evaluate the performance and effectiveness of the prepared adsorbents, similar to those previously reported (Zafanelli et al 2022;Karimi et al 2020).…”

Section: Adsorption Of Nh3 On Cbasmentioning

confidence: 99%

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Removal of gaseous ammonia released from leachate by adsorption on carbon-based adsorbents prepared from agro-industrial wastes

2024

Global NEST: The International Journal

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<p>Landfill facilities and organic waste treatment plants typically are known sources of odour pollution, such as gaseous NH3, among others. In this work, the removal of gaseous NH3 released from a composting line of a mechanical and biological treatment plant of undifferentiated municipal solid waste was assessed in a fixed-bed column loaded with carbon-based adsorbents (CBAs) prepared from olive stone and malt bagasse as carbon precursors. CBAs were prepared by hydrothermal carbonization (HTC) assisted by H2SO4 and pyrolysis, resulting in materials with different physical and chemical properties. The hydrochar derived from olive stone by H2SO4-assisted HTC was found as the best adsorbent for NH3 removal (10.4 mg g-1). This result was ascribed to the high acid character of the adsorbent (2.34 mmol g-1), since it was found that acidity contributed significantly more than the specific surface of the adsorbents for the removal of NH3 (BET surface of 4 m2 g-1 was obtained for the CBA with the highest uptake capacity, whereas other adsorbents reach values of 172 m2 g-1 and NH3 uptake capacities of 0.07 mg g-1). The NH3-saturated hydrochar was regenerated by washing with water and subsequently reused in the adsorption of NH3, with a performance more than 70% compared to its first use.</p>

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Section: Adsorption Of Nh3 On Cbasmentioning

confidence: 99%

“…NH3, per grams of CBA) were estimated by integration of the area under the breakthrough curve, also considering the system flow rate and the mass of adsorbent used, as expressed in Eq. ( 2) (Zafanelli et al 2022;Karimi et al 2020):…”

Section: Adsorption Of Nh3 On Cbasmentioning

confidence: 99%

Removal of gaseous ammonia released from leachate by adsorption on carbon-based adsorbents prepared from agro-industrial wastes

2024

Global NEST: The International Journal

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“…Adsorption processes are widely acknowledged as economically efficient and appealing alternatives for addressing various industrial challenges, including but not limited to postcombustion CO 2 capture, − H 2 purification from steam methane reforming (SMR), − medical O 2 concentrator, − biogas upgrading, − and separation of straight-chain hydrocarbons from the branched chain. − Consequently, pressure swing adsorption (PSA), which is a cyclic process that uses pressure driven to perform bulk separation, is commonly used for H 2 purification from SMR. , The typical SMR off-gas is a mixture of H 2 /CH 4 /CO/CO 2 with a composition of 76/3/4/17%, respectively. From this composition, the conventional PSA can achieve purities of up to 99.9999% with high recoveries of around 96% .…”

Section: Introductionmentioning

confidence: 99%

Green Hydrogen Recovery from Natural Gas Grids by Vacuum Pressure Swing Adsorption

Zafanelli,

Aly,

Henrique

et al. 2024

Ind. Eng. Chem. Res.

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This study focuses on the development of a conceptual vacuum pressure swing adsorption process (VPSA) for green hydrogen (GH) recovery from natural gas grids (NGGs). Accordingly, the kinetics-based separation of H 2 from NGG was achieved by using a commercial carbon molecular sieve (CMS-3K-172) adsorbent. To develop the VPSA cycle, the CMS-3K-172 was characterized, single-and multicomponent breakthrough curves for H 2 and CH 4 were performed, and adsorption isotherms were collected between 195 and 273 K and pressures up to 18 bar. To separate H 2 (20%) from CH 4 (80%), three different VPSA cycle configurations were designed and simulated by using Aspen Adsorption. The operational variables, such as step times, intermediate-to-high-pressure ratio, purge-to-feed ratio, and H 2 initial concentration, were evaluated for maximum values of purity, recovery, and adsorbent productivity. The results show that the VPSA processes can enrich H 2 in the product stream by up to 68% with a recovery of 92%.

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“…Since pure carbon is not photopolymerizable, most SLA-printed carbon materials are obtained by printing a photocurable carbon precursor, followed by heat treatment. Previous studies have reported the use of commercially available photocurable resins based on (meth)acrylates followed by a pyrolysis step to obtain highly porous carbon materials with various pores sizes. − In general, these resins are derived from fossil resources and, in most cases, the carbon yield remains particularly low and the architectures undergo significant volume shrinkage during the thermal treatment. , Therefore, many efforts have been made to develop biobased alternatives to produce 3D-printed porous carbon with attractive yield, reduced shrinkage, and good mechanical properties. , In this context, mimosa tannin has been identified as a suitable biobased precursor to achieve such a specification, in particular with properties that can be adapted to energy and environmental applications such as electromagnetic absorption or catalysis, among others.…”

Section: Introductionmentioning

confidence: 99%

3D-Printed Carbons with Improved Properties and Oxidation Resistance

Blyweert

Nicolas

Fierro

et al. 2023

ACS Sustainable Chem. Eng.

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In this paper, we show the preparation and characteristics of new 3D-printed porous carbons obtained by stereolithography (SLA) of a precursor resin followed by heat treatment. Their physical and textural properties can be tuned by using chemically modified biobased aromatic precursors as monomers. Thus, vanillin and polyflavonoids such as mimosa tannins can be used together as building blocks for SLA materials when functionalized with methacrylate groups by a solvent-free technique and mixed with a photosensitive resin. Adjusting the photosensitive formulations led to high thermal stability and an increase in carbon yield of up to 27%. The corresponding dense porous carbon materials showed outstanding mechanical properties, far exceeding those of other SLA-printed carbons and carbon foams, and a very low surface area, which improves their oxidation resistance compared to acrylate−tannin-derived carbon or activated carbons. This new approach to architecturally engineered carbons with tailored properties can therefore be used for the promising design of catalyst supports or sodium-ion batteries.

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3D-printed activated carbon for post-combustion CO2 capture

Cited by 18 publications

References 35 publications

Removal of gaseous ammonia released from leachate by adsorption on carbon-based adsorbents prepared from agro-industrial wastes

Removal of gaseous ammonia released from leachate by adsorption on carbon-based adsorbents prepared from agro-industrial wastes

Green Hydrogen Recovery from Natural Gas Grids by Vacuum Pressure Swing Adsorption

3D-Printed Carbons with Improved Properties and Oxidation Resistance

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