N-doped porous carbons with exceptionally high CO2 selectivity for CO2 capture

Ren, Xiaomin; Li, He; Chen, Jian; Wei, Lijuan; Modak, Arindam; Yang, Hengquan; Yang, Qihua

doi:10.1016/j.carbon.2016.12.056

Cited by 150 publications

(92 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[8][9][10] Typical physical adsorbents applied are nanoporous materials such as zeolites or zeolitic imidazole frameworks, [11][12][13][14][15] carbon-based materials, [16][17][18][19][20][21] porous organic frameworks, 22,23 and metal-organic-frameworks (MOFs). [24][25][26][27] Common methods to increase their affinity towards CO 2 (that is, the CO 2 adsorption enthalpy) include the introduction of specic interaction sites (e.g., basic nitrogen sites/or extra framework cations in porous carbons or amine MOFs), [28][29][30][31][32][33] as well as the tuning of the ultramicroporosity of the sorbents. 18,34,35 Some thermodynamic sweet spots have been found for different families of materials, oen inspired by mimicking nature's highly selective CO 2 capture mechanism in the ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco).…”

Section: Introductionmentioning

confidence: 99%

Controlling the strength of interaction between carbon dioxide and nitrogen-rich carbon materials by molecular design

Walczak

Savateev

Heske

et al. 2019

Sustainable Energy Fuels

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Controlling the strength of interaction between carbon dioxide and nitrogen-rich carbon materials by molecular design

Walczak

Savateev

Heske

et al. 2019

Sustainable Energy Fuels

View full text Add to dashboard Cite

show abstract

“…via pyrolysis of microporous polyindole with KOH as the activator. The samples were characterized by both a higher V ultramicro /V micro ratio and higher N‐doping amounts, which ensured the carbons with optimized surface polarity and porous structure, thus contributing to their excellent CO 2 adsorption performance . In Li's work, N‐doped carbons were prepared from chitosan char and KOH activation.…”

Section: Combining Modification and Activationmentioning

confidence: 99%

“…The samples were characterized by both a higher V ultramicro /V micro ratio and higher N-doping amounts, which ensured the carbons with optimized surface polarity and porous structure, thus contributing to their excellent CO 2 adsorption performance. 108 In Li's work, N-doped carbons were prepared from chitosan char and KOH activation. The effects of purging gas-flow rate during activation on the formation of ultramicropore and surface functionalities were investigated.…”

Section: Combining Modification and Activationmentioning

confidence: 99%

Carbon‐based adsorbents for post‐combustion capture: a review

et al. 2018

View full text Add to dashboard Cite

Carbon dioxide capture is regarded as an effective method of greenhouse gas reduction. Post‐combustion capture from power plants will play a key role in CO2 abatement due to their important contribution to total CO2 emissions. Compared with the state‐of‐the‐art amine scrubbing technology, adsorption‐based post‐combustion capture (PCC) possesses excellent potential for lowering energy demand, and thus the total cost. Due to their relatively weak interaction with CO2, carbons showed lower adsorption capacity during PCC as compared with some benchmark materials (e.g. amine‐based adsorbents); however, their high cyclic stability and fast adsorption/desorption kinetics suggest that carbons have the important potential to achieve an optimized or balanced performance, and thus provide a low‐cost PCC process. In this review, we present preparation options and consider the structure‐performance relationship in CO2 capture with carbons, and summarize recent progress on using carbons for CO2 capture with special focus on PCC. © 2018 Society of Chemical Industry and John Wiley & Sons, Ltd.

show abstract

“…In comparison, adsorption processes using highly efficient adsorbents, such as activated carbon, porous silica, zeolite, and metal‐organic frameworks (MOFs), have drawn a substantial amount of attention to CO 2 uptake from a high CO 2 concentration gas stream due to their advantages, which include low capital investment costs, low energy requirements, simplicity of operation, and a clean process. Meanwhile, renewable biomass materials such as coconut shells have attracted a significant amount of attention in terms of converting this biomass into a series of high‐quality products, including a particular type of porous biochar, namely CO 2 adsorbent .…”

Section: Introductionmentioning

confidence: 99%

Characteristics of as‐prepared biochar derived from catalytic pyrolysis within moderate‐temperature ionic liquid for CO₂ uptake

Fan

Guo

et al. 2019

Can J Chem Eng

View full text Add to dashboard Cite

A promising biochar as solid adsorbent for CO 2 uptake was prepared by the catalytic pyrolysis of coconut shell in moderate-temperature ionic liquid (IL). Then, it was characterized by means of SEM, EDS, BPEA, BET, NLDFT, FTIR, and TG-DSC, and a mechanism interpretation of the porous biochar formation was conducted. In addition, the adsorption characteristics of CO 2 on the asprepared biochar, such as adsorption capacity, adsorption potential, isosteric heat, and static selectivity at different adsorption temperatures and pressures, were systematically evaluated. The results indicated that the as-prepared biochar exhibited an adequate CO 2 adsorption with a capacity of 4.5 mmol/g at 273 K and 100 kPa. Then, a significant number of slit-like pores were revealed to exist on the as-prepared biochar with a peak pore size between a range of 0.6 nm-2 nm. The porous structure formation was ascribed to the release of carbon-, hydrogen-, oxygen-, sulphur-, and nitrogen-containing compounds during biochar preparation. Meanwhile, both the adsorption potential and isosteric heat of the CO 2 uptake under the tested conditions decreased with an increase in the adsorption capacity, which ranged from 33 kJ/mol-21 kJ/mol and 23 kJ/mol-7 kJ/mol, respectively. Therefore, the isosteric heat could be considered as a piecewise function of adsorption capacity. In addition, the molar ratios of CO 2 over N 2 adsorbed under the tested conditions were above 11 and were accompanied by molar ratio peaks of 26 at 273 K and 19 at 298 K, respectively. Moreover, an interesting phenomenon occurred: the static adsorptive selectivity of CO 2 over N 2 first increased and then decreased and there was an increase in the adsorption pressure at the tested adsorption temperatures. K E Y W O R D Sadsorption potential, biochar, CO 2 adsorption, isosteric heat, selectivity

show abstract

N-doped porous carbons with exceptionally high CO2 selectivity for CO2 capture

Cited by 150 publications

References 53 publications

Controlling the strength of interaction between carbon dioxide and nitrogen-rich carbon materials by molecular design

Controlling the strength of interaction between carbon dioxide and nitrogen-rich carbon materials by molecular design

Carbon‐based adsorbents for post‐combustion capture: a review

Characteristics of as‐prepared biochar derived from catalytic pyrolysis within moderate‐temperature ionic liquid for CO₂ uptake

Contact Info

Product

Resources

About

N-doped porous carbons with exceptionally high CO2 selectivity for CO2 capture

Cited by 150 publications

References 53 publications

Controlling the strength of interaction between carbon dioxide and nitrogen-rich carbon materials by molecular design

Controlling the strength of interaction between carbon dioxide and nitrogen-rich carbon materials by molecular design

Carbon‐based adsorbents for post‐combustion capture: a review

Characteristics of as‐prepared biochar derived from catalytic pyrolysis within moderate‐temperature ionic liquid for CO2 uptake

Contact Info

Product

Resources

About

Characteristics of as‐prepared biochar derived from catalytic pyrolysis within moderate‐temperature ionic liquid for CO₂ uptake