Development of microporous carbons for CO2 capture by KOH activation of African palm shells

Ello, Aimé Serge; Souza, Luiz K.C. de; Trokourey, Albert; Jaroniec, Mietek

doi:10.1016/j.jcou.2013.07.003

Cited by 130 publications

(39 citation statements)

References 27 publications

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“…The fact that KOH is a highly reactive base which makes it slightly less selective and reacts vigorously with the biomass carbon. This results in the formation of micropores of two variable sizes between the sizes of 0.54–0.70 nm and this is consistent with other reports in the literature . ZnCl 2 activated biocarbon shows similar distribution for micropores within this range, however the overall volume of the pores in size 0.70 nm is considerably lower than KOH activated material which indicates that ZnCl 2 is comparatively a milder activation agent.…”

Section: Resultssupporting

confidence: 91%

Facile One‐Pot Synthesis of Activated Porous Biocarbons with a High Nitrogen Content for CO₂ Capture

et al. 2017

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A facile one‐pot synthesis of porous activated biocarbons with a high nitrogen content (NEPBs) through a simple in‐situ self‐assembly of Arundo donax and urea combined with a solid state activation using KOH/ZnCl2 is presented. NEPBs show dominant microporous character and possess a high nitrogen content in the form of pyridinic‐N and pyrrolic‐N and a high specific surface area. The nitrogen content of NEPBs was determined to be in the range of 7.74–19.15%, which was much higher than that of biocarbon derived from non‐activated biomass (1.12%). We also demonstrate that the nitrogen content of NEPBs can easily be tuned by adjusting the impregnation ratios of urea and KOH/ZnCl2. The NEPBs show impressively high CO2 adsorption capacities of 4.8 mmol g−1 at 0 °C/1 bar and 14.1 mmol g−1 at 0 °C/30 bar. A high value of the isosteric heat of adsorption is observed (39 kJ mol−1), confirming the role of nitrogen to enhance the CO2 adsorption capacities through a strong adsorbent‐adsorbate interaction. It is anticipated that the strategy presented here could be extended for the generation of a series of other biomass‐based porous carbon materials with much higher nitrogen contents and controlled textural properties for applications including energy storage and conversion and carbon capture.

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Section: Resultssupporting

confidence: 91%

Facile One‐Pot Synthesis of Activated Porous Biocarbons with a High Nitrogen Content for CO₂ Capture

et al. 2017

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“…Up to date, most of the developed CO 2 sorbents, such as activated carbons, zeolites, ceria based sorbents and amines doped materials are mainly designed for low temperature applications, while ceramics such as Li 4 SiO 4 and Li 2 ZrO 3 are designed for HT CO 2 sorption [2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

CO₂ Capture at High Temperature Using Fly Ash-Derived Sodium Silicates

Sanna

Maroto‐Valer

2016

Ind. Eng. Chem. Res.

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Despite the fact that Na-silicates have been indicated as good sorbent at ambient temperature, their potential as HT CO 2 sorbent has not yet been examined. In this work, CO 2 sorption of fly ash derived sodium silicates was evaluated at 500, 600 and 700°C. The effect of 2-12vol% moisture, 12.5-100 vol% CO 2 and CO 2 sorption promoters on CO 2 sorption was also evaluated. The results indicate that the carbonate:silica ratio used in the sorbents synthesis significantly affects the CO 2 sorption capacity and regeneration temperature. Calcination at 800°C is preferred due to formation of metastable sodium silicate phases, which resulted in higher CO 2 uptake. Among the developed sorbents, Na-FA 0.5:1 was preferred because able to maintain CO 2 sorption/desorption capacity after 5 cycles (compared to 1:1 and 1.5:1). NA-FA 0.5:1 had good capacity at postcombustion conditions (12.5%CO 2 , 12%H 2 O, 700°C). The presence of 20% Li 2 CO 3 additive enhanced the CO 2 sorption of 20%. Overall, the Na-FA 0.5:1 sorbent showed a CO 2 capture capacity and recyclability comparable to those of other high-temperature sorbents.

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“…It has been reported that micropores, especially narrow micropores less than 0.7 nm, play an important role in enhancing CO 2 adsorption [21]. Moreover, the presence of heteroatoms, such as nitrogen, influences the CO 2 adsorption performance [22,23].…”

Section: Advances In Engineering Research Volume 129mentioning

confidence: 99%

Porous carbons from hydrothermal carbonization of corn stover for highly efficient CO2 capture

Qi¹,

Wang

Shen³

2017

Proceedings of the 2017 6th International Conference on Energy, Environment and Sustainable Development (ICEESD 2017)

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Abstract. Sustainable biomass-derived carbon materials were produced by hydrothermal carbonization of corn stover that was followed by chemical activation with KOH. The prepared carbon materials were used for CO 2 adsorption, and had a CO 2 uptake of 7.14 mmol/g at a pressure of 1 bar and at 0 o C that was much higher than CO 2 uptake by activated carbon that was prepared from direct activation of corn stover (2.78 mmol/g). The porous corn stover-derived carbonaceous material had high surface area (2442 m 2 /g) and large pore volume (1.55 cm 3 /g). Product yields obtained by activation of hydrothermally carbonized corn stover were significantly higher than that by the direct activation of corn stover (36-75% VS. 8%). The prepared corn stover-derived porous carbon had a high CO 2 /N 2 selectivity of 15.5, and exhibited constant CO 2 uptake for five successive reuse cycles. The hydrothermal carbonization step plays important role for producing porous carbons from biomass that have high and specific adsorption properties.

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Development of microporous carbons for CO2 capture by KOH activation of African palm shells

Cited by 130 publications

References 27 publications

Facile One‐Pot Synthesis of Activated Porous Biocarbons with a High Nitrogen Content for CO₂ Capture

Facile One‐Pot Synthesis of Activated Porous Biocarbons with a High Nitrogen Content for CO₂ Capture

CO₂ Capture at High Temperature Using Fly Ash-Derived Sodium Silicates

Porous carbons from hydrothermal carbonization of corn stover for highly efficient CO2 capture

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Development of microporous carbons for CO2 capture by KOH activation of African palm shells

Cited by 130 publications

References 27 publications

Facile One‐Pot Synthesis of Activated Porous Biocarbons with a High Nitrogen Content for CO2 Capture

Facile One‐Pot Synthesis of Activated Porous Biocarbons with a High Nitrogen Content for CO2 Capture

CO2 Capture at High Temperature Using Fly Ash-Derived Sodium Silicates

Porous carbons from hydrothermal carbonization of corn stover for highly efficient CO2 capture

Contact Info

Product

Resources

About

Facile One‐Pot Synthesis of Activated Porous Biocarbons with a High Nitrogen Content for CO₂ Capture

Facile One‐Pot Synthesis of Activated Porous Biocarbons with a High Nitrogen Content for CO₂ Capture

CO₂ Capture at High Temperature Using Fly Ash-Derived Sodium Silicates