In situ nitrogen enriched carbon for carbon dioxide capture

Thote, Jayshri; Iyer, Kartik S.; Chatti, Ravikrishna V.; Labhsetwar, Nitin; Biniwale, Rajesh B.; Rayalu, Sadhana

doi:10.1016/j.carbon.2009.09.042

Cited by 131 publications

(49 citation statements)

References 9 publications

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“…For example, the functionalization of AC by nitrogen-containing basic groups has been extensively reported in the literature. 20,[24][25][26] The incorporation of nitrogen-containing basic groups could create additional sites for the adsorption of CO 2 . 24 However, in some cases, the functionalization of AC by amino/nitro groups has resulted in the decrease of Brunauer-Emmett-Teller (BET) surface area and micropore volume, leading to the drop of CO 2 capture capacity of nitrogen-modified adsorbent compared to that of the pristine sample.…”

Section: Introductionmentioning

confidence: 99%

“…20,[24][25][26] The incorporation of nitrogen-containing basic groups could create additional sites for the adsorption of CO 2 . 24 However, in some cases, the functionalization of AC by amino/nitro groups has resulted in the decrease of Brunauer-Emmett-Teller (BET) surface area and micropore volume, leading to the drop of CO 2 capture capacity of nitrogen-modified adsorbent compared to that of the pristine sample. 20 Recently, Zhao et al has reported a facile synthesis of porous carbon nitride spheres with hierarchical three-dimensional mesostructures and nitrogen-containing groups for CO 2 capture.…”

Section: Introductionmentioning

confidence: 99%

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Ultramicroporous silicon nitride ceramics for CO₂ capture

et al. 2015

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Carbon dioxide (CO 2 ) capture is regarded as one of the biggest challenges of the 21st century; therefore, intense research effort has been dedicated in the area of developing new materials for efficient CO 2 capture. Here, we report high CO 2 capture capacity in the low region of applied CO 2 pressures observed with ultramicroporous silicon nitride-based material. The latter is synthesized by a facile one-step NH 3 -assisted thermolysis of a polysilazane. Our newly developed material for CO 2 capture has the following outstanding properties: (i) one of the highest CO 2 capture capacities per surface area of micropores, with a CO 2 uptake of 2.35 mmol g À1 at 273 K and 1 bar (ii) a low isosteric heat of adsorption (27.6 kJ mol À1 ), which is independent from the fractional surface coverage of CO 2 . Furthermore, we demonstrate that the pore size plays a crucial role in elevating the CO 2 adsorption capacity, surpassing the effect of Brunauer-Emmett-Teller specific surface area.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultramicroporous silicon nitride ceramics for CO₂ capture

et al. 2015

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“…CO 2 is produced as a flue gas in many industrial processes, and in automobile exhausts [18,19]. The removal of CO 2 from flue gases by a capture process is necessary prior to their release to the atmosphere.…”

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confidence: 99%

Facile synthesis of porous carbon nitride spheres with hierarchical three-dimensional mesostructures for CO2 capture

et al. 2010

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Porous carbon nitride (CN) spheres with partially crystalline frameworks have been successfully synthesized via a nanocasting approach by using spherical mesoporous cellular silica foams (MCFs) as a hard template, and ethylenediamine and carbon tetrachloride as precursors. The resulting spherical CN materials have uniform diameters of ca. 4 μm, hierarchical three-dimensional (3-D) mesostructures with small and large mesopores with pore diameters centered at ca. 4.0 and 43 nm, respectively, a relatively high BET surface area of ~550 m 2 /g, and a pore volume of 0.90 cm 3 /g. High-resolution transmission electron microscope (HRTEM) images, wide-angle X-ray diffraction (XRD) patterns, and Raman spectra demonstrate that the porous CN material has a partly graphitized structure. In addition, elemental analyses, X-ray photoelectron spectra (XPS), Fourier transform infrared spectra (FT-IR), and CO 2 temperature-programmed desorption (CO 2 -TPD) show that the material has a high nitrogen content (17.8 wt%) with nitrogen-containing groups and abundant basic sites. The hierarchical porous CN spheres have excellent CO 2 capture properties with a capacity of 2.90 mmol/g at 25 °C and 0.97 mmol/g at 75 °C , superior to those of the pure carbon materials with analogous mesostructures. This can be mainly attributed to the abundant nitrogen-containing basic groups, hierarchical mesostructure, relatively high BET surface area and stable framework. Furthermore, the presence of a large number of micropores and small mesopores also enhance the CO 2 capture performance, owing to the capillary condensation effect.

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“…ammonia [22,23], urea [24,25], nitrogen oxides [26], hydroxyl amine and hydrazine [27], (2) pyrolysis/activation (mainly physical) of polymers or rich in nitrogen vegetation origin precursors (e.g. polyacrylonitrile [28], polyamides [29], polyimides [30] and waste material left after soybean growing and processing [31]; and (3) impregnation of carbons with solutions of amines and imines of any order [32,33] or coating carbons with a layer of polymers containing nitrogen in their structure [34]. Depending on the type of precursor and the variant of its modification, the carbon materials obtained are characterized by different contents of nitrogen and their different types, i.e.…”

Section: Introductionmentioning

confidence: 99%

Effect of heat treatment on the physicochemical properties of nitrogen-enriched activated carbons

Nowicki

2016

J Therm Anal Calorim

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A series of functionalized carbonaceous adsorbents were prepared by means of reaction with urea and chemical activation of Polish brown coal. In order to obtain nitrogen groups bonded in different ways to the carbon structure, the reaction with urea was performed at two different stages of processing, with precursor or char. Additionally, the influence of annealing under nitrogen atmosphere at 600 and 800°C or in hydrogen/nitrogen mixture at 600°C on the textural, acid-base and thermal properties of activated carbons prepared was tested. The resulting materials were characterized by elemental analysis, low-temperature nitrogen sorption, determination of the number of surface oxygen groups as well as by thermogravimetric study in helium atmosphere. The final products were microporous nitrogen-enriched activated carbons of very well-developed surface area reaching from 1303 to 2004 m 2 g -1 , showing different content of nitrogen (from 0.5 to 2.3 mass%) and different chemical character of the surface (from weakly acidic to intermediate acidic-basic), depending on the sequence of particular processes and variant of further thermochemical treatment. According to the results of thermal study, the nitrogen functional groups introduced into the carbon structure by the reaction with urea (especially at the char stage) show moderate thermal and chemical stability. Under the effect of high temperature, some of these groups underwent decomposition or transformation into more thermally stable nitrogen species. It was also proved that the thermochemical treatment of modified activated carbons led to considerable deterioration of their textural parameters as well as caused significant changes in the acid-base character of their surface.

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In situ nitrogen enriched carbon for carbon dioxide capture

Cited by 131 publications

References 9 publications

Ultramicroporous silicon nitride ceramics for CO₂ capture

Ultramicroporous silicon nitride ceramics for CO₂ capture

Facile synthesis of porous carbon nitride spheres with hierarchical three-dimensional mesostructures for CO2 capture

Effect of heat treatment on the physicochemical properties of nitrogen-enriched activated carbons

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In situ nitrogen enriched carbon for carbon dioxide capture

Cited by 131 publications

References 9 publications

Ultramicroporous silicon nitride ceramics for CO2 capture

Ultramicroporous silicon nitride ceramics for CO2 capture

Facile synthesis of porous carbon nitride spheres with hierarchical three-dimensional mesostructures for CO2 capture

Effect of heat treatment on the physicochemical properties of nitrogen-enriched activated carbons

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Ultramicroporous silicon nitride ceramics for CO₂ capture

Ultramicroporous silicon nitride ceramics for CO₂ capture