N-doped porous carbon derived from macadamia nut shell for CO2 adsorption

Bai, Jiali; Huang, Jiamei; Yu, Qiyun; Demir, Müslüm; Kılıç, Murat; Altay, Bilge Nazlı; Hu, Xin; Wang, Linlin

doi:10.1016/j.fuproc.2023.107854

Cited by 54 publications

(12 citation statements)

References 78 publications

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“…Carbons fabricated in the present work have shown a slight increase in the presence of N in BC-O materials while sulfur was detected in BC-S ones. The enhancement of CO 2 adsorption was not clearly detected by the presence of these heteroatoms [ 45 , 46 ], but the presence of sulfur causes an increase in the size of pores, increasing the CO 2 uptake and reducing the selectivity.…”

Section: Resultsmentioning

confidence: 99%

S/N/O-Enriched Carbons from Polyacrylonitrile-Based Block Copolymers for Selective Separation of Gas Streams

Gómez-Díaz,

Domínguez-Ramos,

Malucelli

et al. 2024

Polymers

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A series of polyacrylonitrile (PAN)-based block copolymers with poly(methyl methacrylate) (PMMA) as sacrificial bock were synthesized by atom transfer radical polymerization and used as precursors for the synthesis of porous carbons. The carbons enriched with O- and S-containing groups, introduced by controlled oxidation and sulfuration, respectively, were characterized by Raman spectroscopy, scanning electron microscopy, and X-ray photoelectron spectrometry, and their surface textural properties were measured by a volumetric analyzer. We observed that the presence of sulfur tends to modify the structure of the carbons, from microporous to mesoporous, while the use of copolymers with a range of molar composition PAN/PMMA between 10/90 and 47/53 allows the obtainment of carbons with different degrees of porosity. The amount of sacrificial block only affects the morphology of carbons stabilized in oxygen, inducing their nanostructuration, but has no effect on their chemical composition. We also demonstrated their suitability for separating a typical N2/CO2 post-combustion stream.

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Section: Resultsmentioning

confidence: 99%

S/N/O-Enriched Carbons from Polyacrylonitrile-Based Block Copolymers for Selective Separation of Gas Streams

Gómez-Díaz,

Domínguez-Ramos,

Malucelli

et al. 2024

Polymers

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“…In conclusion, the utilization of MgO templates aids in the production of mesopores and macropores, while the synergistic utilization of nano MgO and KOH contributes to the formation of a hierarchical porous structure. Typically, the porosity of porous carbon is known to be greatly affected by the activation temperature. − To examine the activation temperature on the pore structure of the carbons, HPC 1.5 -4(700) and HPC 1.5 -4(900) were synthesized with a similar method as HPC 1.5 -4 with activation temperatures of 700 and 900 °C, respectively. As shown in Figure S3 and Table S2, at 700 °C, the activation of HPC 1.5 -4(700) is insufficient, resulting in underdeveloped pores (1902 m 2 g –1 ).…”

Section: Results and Discussionmentioning

confidence: 99%

Synthesis of Hierarchical Porous Carbon from Bio-Oil for Supercapacitor Application

Wang,

Qin,

et al. 2023

Energy Fuels

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The realm of high-performance supercapacitor electrodes grapples with the inherent limitations of biomass-derived carbons: an inadequate count of ion adsorption locales and sluggish ion mobility. Attaining scalability in the synthesis of hierarchical porous carbon (HPC) with precisely defined pore architectures remains an enduring challenge. This review showcases the successful synthesis of HPC from bio-oil on a large scale, accomplished through a MgO template-assisted self-assembly polymerization, followed by sequential pyrolysis and KOH activation strategies. The optimized carbon (HPC1.5-4) achieves a potent specific surface area of 2069 m2 g–1 and a pore volume of 1.30 cm3 g–1 with hierarchical micro-, meso-, and macropores, thus providing ample ion adsorption sites and ion diffusion pathways. Three-electrode supercapacitor fabricated by HPC1.5-4 presents a high specific capacitance of 296 F g–1 at 1 A g–1, outstanding rate capability, and satisfactory cyclic durability. Furthermore, the symmetric supercapacitor in the Na2SO4 electrolyte harvests a high energy density of 18.9 Wh kg–1 at 469.4 W kg–1.

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“…The graph revealed that some mesopores, in addition to micropores, were present in CAC2 and CAC2-N. Bamboo-based activated carbons with a large proportion of micropores were composed of similar pore size distributions with coconut-based samples (CAC1 and CAC1-N). Sufficient micropores facilitate CO2 capture [44,45]. Figure 6 focuses on the pore size distribution of 2 nm or fewer micropores formed in each sorbent.…”

Section: Textural Analysismentioning

confidence: 99%

Fabrication of Bamboo-Based Activated Carbon for Low-Level CO2 Adsorption toward Sustainable Indoor Air

Heo,

Kim,

et al. 2024

Sustainability

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This study fabricated a low-cost activated carbon (AC) adsorbent from readily available bamboo trees to control indoor CO2 levels and reduce energy costs associated with sustaining clean indoor air. Bamboo is naturally high in potassium content and has narrow fibrous channels that could enhance selective CO2 adsorption. The prepared bamboo-based activated carbon (BAC) exhibits predominantly micropores with an average pore size of 0.17 nm and a specific surface area of 984 m2/g. Upon amination, amine functionalities, such as pyridine, pyrrole, and quaternary N, were formed on its surface, enhancing its CO2 adsorption capacity of 0.98 and 1.80 mmol/g for low-level (3000 ppm) and pure CO2 flows at the ambient condition, respectively. In addition, the 0.3% CO2/N2 selectivity (αs,g) of the prepared sorbents revealed a superior affinity of CO2 by BAC (8.60) over coconut shell-based adsorbents (1.16–1.38). Furthermore, amination enhanced BAC’s CO2αs,g to 13.4. These results exhibit this sustainable approach's potential capabilities to ensure the control of indoor CO2 levels, thereby reducing the cost associated with mechanical ventilation systems. Further research should test the new sorbent’s adsorption properties (isotherm, kinetics, and thermodynamics) for real-life applicability.

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N-doped porous carbon derived from macadamia nut shell for CO2 adsorption

Cited by 54 publications

References 78 publications

S/N/O-Enriched Carbons from Polyacrylonitrile-Based Block Copolymers for Selective Separation of Gas Streams

S/N/O-Enriched Carbons from Polyacrylonitrile-Based Block Copolymers for Selective Separation of Gas Streams

Synthesis of Hierarchical Porous Carbon from Bio-Oil for Supercapacitor Application

Fabrication of Bamboo-Based Activated Carbon for Low-Level CO2 Adsorption toward Sustainable Indoor Air

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