Heteroatom functionalized activated porous biocarbons and their excellent performance for CO<sub>2</sub> capture at high pressure

Singh, Gurwinder; Kim, In Young; Lakhi, Kripal S.; Joseph, Stalin; Srivastava, Prashant; Naidu, Ravi

doi:10.1039/c7ta07186h

Cited by 96 publications

(50 citation statements)

References 56 publications

(44 reference statements)

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“…The capacity of CO 2 capture at 298 K at 1 bar for the samples was found to follow this order: AC (3.15 mmol/g) > NAC-2 (2.75 mmol/g) > NAC-1 (2.69 mmol/g) > NAC-3 (2.44 mmol/g) > NAC-4 (1.95 mmol/g). 43,44 But in this work, it did not play a dominant role. We can reach the conclusion that the specific surface area has the most significant effect on the capacity of CO 2 capture.…”

Section: Raman Spectroscopy Analysismentioning

confidence: 76%

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Nitrogen‐doping activated biomass carbon from tea seed shell for CO ₂ capture and supercapacitor

2019

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Activated carbon is a promising material that has a broad application prospect.In this work, biomass (tea seed shell) was used to prepare activated carbon with KOH activation (referred to as AC), and nitrogen was doped in activated carbon using melamine as the nitrogen source (referred to as NAC-x, where x is the mass ratio of melamine and activated carbon). The obtained activated biomass carbon (activated bio-carbon) samples were characterized by Brunauer-Emmett-Teller (BET)-specific surface area analysis, ultimate analysis, X-ray photoelectron spectroscopy (XPS) analysis, Raman spectrum analysis, and X-ray diffraction (XRD) patterns. The specific surface areas of activated bio-carbons were 1503.20 m 2 /g (AC), 1064.54 m 2 /g (NAC-1), 1187.93 m 2 /g (NAC-2), 1055.32 m 2 /g (NAC-3), and 706.22 m 2 /g (NAC-4), revealing that nitrogen-doping process leads to decrease in specific surface area. XPS analysis revealed that the main nitrogen-containing functional groups were pyrrolic-N and pyridinic-N. The capacity of CO 2 capture and electrochemical performance of activated bio-carbon samples were investigated. The CO 2 capturing capacity followed this order: AC (3.15 mmol/g) > NAC-2 (2.75 mmol/g) > NAC-1 (2.69 mmol/g) > NAC-3 (2.44 mmol/g) > NAC-4 (1.95 mmol/g) at 298 K at 1 bar, which is consistent with the order of specific surface area. The specific surface area played a dominant role in CO 2 capturing capacity. As for supercapacitor, AC-4 showed the highest specific capacitance (168 F/g) at the current density of 0.5 A/g, but NAC-2 showed the best electrochemical performance (89 F/g) at 2 A/g. Nitrogen-containing functional groups and specific surface area both had an important impact on electrochemical performance. In general, NAC-3 and NAC-2 produced excellent electrochemical performance. Compared with NAC-3, less melamine was used to prepare NAC-2; therefore, NAC-2 was considered as the best activated bio-carbon for supercapacitor for 141 F/g (at 0.5 A/g), 108 F/g (at 1 A/g), and 89 F/g (at 2 A/g) in this work.

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Section: Raman Spectroscopy Analysismentioning

confidence: 76%

“…-Besides, nitrogen-containing functional groups were reported to have a positive impact on CO 2 capture. 43,44 But in this work, it did not play a dominant role. AC has the lowest nitrogen content and highest specific surface area, while its capacity of CO 2 capture was the best among the samples.…”

Section: Raman Spectroscopy Analysismentioning

confidence: 76%

Nitrogen‐doping activated biomass carbon from tea seed shell for CO ₂ capture and supercapacitor

2019

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“…The Q st value is an important measure of the interaction strength between the CO 2 molecule and the carbon surface. The initial Q st at low CO 2 coverage is in the range of 24.0‐30.4 kJ mol −1 , comparable to the reported results of nitrogen doped carbons ,. Agar‐0.75‐600‐1 has the highest value of 30.4 kJ mol −1 , which might be an interplay between the nitrogen content and pore size: although more pores larger than 1 nm are formed, but more nitrogen is doped into the carbon with more urea addition.…”

Section: Resultsmentioning

confidence: 95%

Agar‐Derived Nitrogen‐Doped Porous Carbon for CO₂ Adsorption

Shi

Yan

et al. 2018

ChemistrySelect

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An efficient carbonaceous CO2 adsorbent with doped nitrogen element is derived from agar. Agar was mixed with urea and the mixture was then carbonized. After chemical activation with KOH, nitrogen doped microporous carbon was obtained. The nitrogen content was up to 8.58 wt %, depending on the preparation conditions. The CO2 adsorption properties, including the adsorption isotherms, the isosteric heat of adsorption and the adsorption selectivity were studied. The highest CO2 uptake of 6.5 mmol g−1 (273 K, 1 bar) was achieved by a carbon activated at 600 °C with moderate nitrogen content, while the carbon activated at 550 °C exhibited the best CO2/N2 selectivity of 37. The current work exploits the potential use of agar as carbon precursor for CO2 adsorbent, and provides a convenient and effective approach to nitrogen doping.

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“…This indicated that the pore structure and N‐doping of the N‐HPC‐800 also influenced the high‐pressure CO 2 adsorption capacity. As demonstrated in previous reports, super‐micropores or small mesopores (below 2–3 nm) govern the sorption behavior at a high pressure, and basic functional groups by N‐doping are favorable for the adsorption of acidic CO 2 molecules . We compared the performances of our N‐HPC‐800 to representative porous carbon materials as CO 2 high‐pressure solid adsorbents.…”

Section: Resultsmentioning

confidence: 99%

Ultrahigh Surface Area N‐Doped Hierarchically Porous Carbon for Enhanced CO₂ Capture and Electrochemical Energy Storage

et al. 2019

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Facile synthesis of ultrahigh surface area porous carbons with well‐defined functionalities such as N‐doping remains a formidable challenge as extensive pore creation results in significant damage to the active sites. Herein, an ultrahigh surface area, N‐doped hierarchically porous carbon was prepared through a multicomponent co‐assembly approach. The resultant N‐doped hierarchically porous carbon (N‐HPC) possessed an ultrahigh surface area (≈1960 m2 g−1), a uniform interpenetrating micropore (≈1.3 nm) and large mesopore (≈7.6 nm) size, and high N‐doping in the carbon frameworks (≈5 wt %). The N‐HPC exhibited a high specific capacitance (358 F g−1 at 0.5 A g−1) as a supercapacitor electrode in aqueous alkaline electrolyte with a stable cycling performance after10 000 charge/discharge cycles. Moreover, as a CO2 absorbent, N‐HPC displayed an adsorption capacity of 29.0 mmol g−1 at 0 °C under a high pressure of 30 bar.

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Heteroatom functionalized activated porous biocarbons and their excellent performance for CO₂ capture at high pressure

Abstract: Activated biocarbons with a porous structure and nitrogen functionalities are synthesized from the prolific waste biomass, Arundo donax, and an organic material, chitosan, by a simple one step chemical activation with ZnCl2.

Cited by 96 publications

References 56 publications

Nitrogen‐doping activated biomass carbon from tea seed shell for CO ₂ capture and supercapacitor

Nitrogen‐doping activated biomass carbon from tea seed shell for CO ₂ capture and supercapacitor

Agar‐Derived Nitrogen‐Doped Porous Carbon for CO₂ Adsorption

Ultrahigh Surface Area N‐Doped Hierarchically Porous Carbon for Enhanced CO₂ Capture and Electrochemical Energy Storage

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Heteroatom functionalized activated porous biocarbons and their excellent performance for CO2 capture at high pressure

Abstract: Activated biocarbons with a porous structure and nitrogen functionalities are synthesized from the prolific waste biomass, Arundo donax, and an organic material, chitosan, by a simple one step chemical activation with ZnCl2.

Cited by 96 publications

References 56 publications

Nitrogen‐doping activated biomass carbon from tea seed shell for CO 2 capture and supercapacitor

Nitrogen‐doping activated biomass carbon from tea seed shell for CO 2 capture and supercapacitor

Agar‐Derived Nitrogen‐Doped Porous Carbon for CO2 Adsorption

Ultrahigh Surface Area N‐Doped Hierarchically Porous Carbon for Enhanced CO2 Capture and Electrochemical Energy Storage

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Product

Resources

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Heteroatom functionalized activated porous biocarbons and their excellent performance for CO₂ capture at high pressure

Nitrogen‐doping activated biomass carbon from tea seed shell for CO ₂ capture and supercapacitor

Nitrogen‐doping activated biomass carbon from tea seed shell for CO ₂ capture and supercapacitor

Agar‐Derived Nitrogen‐Doped Porous Carbon for CO₂ Adsorption

Ultrahigh Surface Area N‐Doped Hierarchically Porous Carbon for Enhanced CO₂ Capture and Electrochemical Energy Storage