CO2 adsorption at nitrogen-doped carbons prepared by K2CO3 activation of urea-modified coconut shell

Yue, Limin; Xia, Qiongzhang; Wang, Liwei; Wang, Linlin; DaCosta, Herbert; Yang, Jie; Hu, Xin

doi:10.1016/j.jcis.2017.09.040

Cited by 272 publications

(131 citation statements)

References 73 publications

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“…After NaNH 2 activation, the nitrogen content of the sample decreased, which may be attributed to the decomposition of nitrogen at a certain temperature. Although pyrolysis reduced the nitrogen content of the sample, NaNH 2 as an activator can act as a nitrogen source to certain degree, making the overall nitrogen content of N‐doped adsorbent relatively higher than some of the already reported N‐doped adsorbents . When the adsorbent was prepared at the same temperature, the nitrogen content of the adsorbent increased as the mass ratio of NaNH 2 increased except the OAC‐550‐2.5.…”

Section: Resultsmentioning

confidence: 87%

“…Considering recyclability and stability, as shown in Figure , sample OAC‐500‐2.5 was tested for five cycles of CO 2 adsorption/desorption at 298 K. After five cycles of adsorptions/desorption, the adsorption of CO 2 by the adsorbent was only decreased by 2.5%, which was lower than the values reported for other typical adsorbent. For example, Yue et al prepared the walnut shell activated carbon having 3.6% loss after five runs adsorptions/desorption for CO 2 adsorption. In other words, low loss of adsorption capacity indicating the adsorbent had the high potentiality to reuse in CO 2 adsorption procedure.…”

Section: Resultsmentioning

confidence: 99%

“…Although pyrolysis reduced the nitrogen content of the sample, NaNH 2 as an activator can act as a nitrogen source to certain degree, making the overall nitrogen content of N-doped adsorbent relatively higher than some of the already reported N-doped adsorbents. 29 When the adsorbent was prepared at the same temperature, the nitrogen content of the adsorbent increased as the mass ratio of NaNH 2 increased except the OAC-550-2.5. The result manifested that NaNH 2 could effectually merge nitrogen species into the carbonaceous precursor.…”

Section: Chemical Composition and Surface Propertiesmentioning

confidence: 95%

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One‐pot synthesis of high N‐doped porous carbons derived from a N‐rich oil palm biomass residue in low temperature for CO ₂ capture

et al. 2020

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Summary Porous carbon materials have been widely used for CO2 adsorption, but their preparation was subject to conditions such as raw material cost, activator corrosion, and temperature. In this study, nitrogen‐doped porous carbonaceous adsorbents were prepared in a low temperature region (400‐550°C) by one‐step composite nitrogen doping method, using low‐cost oil residue as raw materials and less corrosive NaNH2 as activator. The CO2 adsorption performances of the prepared N‐doped porous adsorbents were systematically explored. The results showed that optimal oil residue‐derived carbonaceous adsorbent owned excellent amount of CO2 adsorption up to 3.51 and 5.63 mmol/g at 298 and 273 K under 1 bar, respectively. It was discovered that the congenerous influences of porous structure, nitrogen content and Vn of the adsorbent affected their CO2 adsorption performances under 1 bar. Importantly, these oil residue porous carbonaceous adsorbent also was verified owning fine selectivity of the CO2 over N2 (15.7), which attributed to its high Vn and nitrogen content. Furthermore, optimal sample OAC‐500‐2.5 owned medium Qst (21‐26 kJ/mol), which was beneficial practical application. This work may inspire new sparks on novel nitrogen‐doped adsorbent with inexpensive precursor, low activation temperature and simple preparative tactic, indicating that the nitrogen‐doped sample is promising in the practical situation of CO2 adsorption.

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Section: Resultsmentioning

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Section: Chemical Composition and Surface Propertiesmentioning

confidence: 95%

See 1 more Smart Citation

One‐pot synthesis of high N‐doped porous carbons derived from a N‐rich oil palm biomass residue in low temperature for CO ₂ capture

et al. 2020

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“…The physical activation is to oxidize precursor using oxidizing gases such as O 2 [23], CO 2 [24] and H 2 O [25]. The chemical activation is to treat the precursor using chemical reagents such as H 3 PO 4 [26], H 2 SO 4 [27], KOH [28], ZnCl 2 [29], and K 2 CO 3 [30]. Both physical and chemical activation methods usually need high temperature (400°C-1000°C) to oxidize or etch the precursor to form multi-porous structure.…”

Section: Introductionmentioning

confidence: 99%

Biosorbents prepared from pomelo peel by hydrothermal technique and its adsorption properties for congo red

Zheng

Sun

et al. 2020

Mater. Res. Express

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A new kind of biosorbent was prepared from pomelo peel by using potassium hydroxide as activating agent and hydrothermal treatment method. The characteristics of materials were analyzed by SEM, BET and FTIR. Increasing the adsorbent dosage (from 2.5 to 17.5 g l −1 ) and contents of congo red in solution (from 20 to 50 mg l −1 ) cause the increment of removal rate of congo red. On the other side, the removal rate is decrement with rising of temperature and pH. The maximum adsorption quantity of biosorbent was 144.93 mg g −1 at 303 K, which calculated by Langmuir model. The pseudo-firstorder kinetic model, pseudo-second-order kinetic model and intra-particle diffusion model were used to explain adsorption process. The value of Gibbs free energy (ΔG) is −7.63 (kJ/mol) at 303 K and the enthalpy change (ΔH) is −31.43 (kJ/mol), meaning that adsorption behavior for congo red is spontaneous.

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“…The carbon material was used to capture CO 2 (74.5 mg g −1 ) from a mixture of N 2 and CO 2 and the chemisorbed amount of the gas increased over a temperature range, 0-40°C. Further, nitrogen doped carbon materials have been used as excellent CO 2 sorbents [33][34][35][36] because the hydrogen bonding between the surface of carbon and CO 2 molecule is considered to facilitate adsorption process. A nitrogen doped activated carbon material is synthesized by Xing et al [37], using bean dreg of soya bean milk.…”

Section: Introductionmentioning

confidence: 99%

Efficient CO₂ adsorption using mesoporous carbons from biowastes

Sriram

Supriya²,

Kurkuri

et al. 2019

Mater. Res. Express

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The mesoporous carbon nanomaterials obtained from waste onion peels confirmed the formation of mesoporous carbon nanospheres (CNSs) with an average pore diameter of 2 nm. The as obtained CNSs were studied to demonstrate their ability to adsorb the greenhouse gas CO 2 at different temperatures, 30, 40 and 50°C. The results showed that the CNSs have high potential to adsorb CO 2 at these temperatures. Present work demonstrates the formation of sustainable, porous adsorbents by a simple waste to wealth based approach that is effective for the adsorption of CO 2 .

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CO2 adsorption at nitrogen-doped carbons prepared by K2CO3 activation of urea-modified coconut shell

Cited by 272 publications

References 73 publications

One‐pot synthesis of high N‐doped porous carbons derived from a N‐rich oil palm biomass residue in low temperature for CO ₂ capture

One‐pot synthesis of high N‐doped porous carbons derived from a N‐rich oil palm biomass residue in low temperature for CO ₂ capture

Biosorbents prepared from pomelo peel by hydrothermal technique and its adsorption properties for congo red

Efficient CO₂ adsorption using mesoporous carbons from biowastes

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CO2 adsorption at nitrogen-doped carbons prepared by K2CO3 activation of urea-modified coconut shell

Cited by 272 publications

References 73 publications

One‐pot synthesis of high N‐doped porous carbons derived from a N‐rich oil palm biomass residue in low temperature for CO 2 capture

One‐pot synthesis of high N‐doped porous carbons derived from a N‐rich oil palm biomass residue in low temperature for CO 2 capture

Biosorbents prepared from pomelo peel by hydrothermal technique and its adsorption properties for congo red

Efficient CO2 adsorption using mesoporous carbons from biowastes

Contact Info

Product

Resources

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One‐pot synthesis of high N‐doped porous carbons derived from a N‐rich oil palm biomass residue in low temperature for CO ₂ capture

One‐pot synthesis of high N‐doped porous carbons derived from a N‐rich oil palm biomass residue in low temperature for CO ₂ capture

Efficient CO₂ adsorption using mesoporous carbons from biowastes