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Ultramicroporous silicon nitride ceramics for CO2 capture

Schitco, Cristina and Seifollahi Bazarjani, Mahdi and Riedel, Ralf and Gurlo, Aleksander (2015):
Ultramicroporous silicon nitride ceramics for CO2 capture.
In: Journal of Materials Research, Cambridge University Press, pp. 2958-2966, 30, (19), ISSN 0884-2914, [Online-Edition: http://dx.doi.org/10.1557/jmr.2015.165],
[Article]

Abstract

Carbon dioxide (CO2) 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 CO2 capture. Here, we report high CO2 capture capacity in the low region of applied CO2 pressures observed with ultramicroporous silicon nitride-based material. The latter is synthesized by a facile one-step NH3-assisted thermolysis of a polysilazane. Our newly developed material for CO2 capture has the following outstanding properties: (i) one of the highest CO2 capture capacities per surface area of micropores, with a CO2 uptake of 2.35 mmol g−1 at 273 K and 1 bar (ii) a low isosteric heat of adsorption (27.6 kJ mol−1), which is independent from the fractional surface coverage of CO2. Furthermore, we demonstrate that the pore size plays a crucial role in elevating the CO2 adsorption capacity, surpassing the effect of Brunauer–Emmett–Teller specific surface area.

Item Type: Article
Erschienen: 2015
Creators: Schitco, Cristina and Seifollahi Bazarjani, Mahdi and Riedel, Ralf and Gurlo, Aleksander
Title: Ultramicroporous silicon nitride ceramics for CO2 capture
Language: English
Abstract:

Carbon dioxide (CO2) 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 CO2 capture. Here, we report high CO2 capture capacity in the low region of applied CO2 pressures observed with ultramicroporous silicon nitride-based material. The latter is synthesized by a facile one-step NH3-assisted thermolysis of a polysilazane. Our newly developed material for CO2 capture has the following outstanding properties: (i) one of the highest CO2 capture capacities per surface area of micropores, with a CO2 uptake of 2.35 mmol g−1 at 273 K and 1 bar (ii) a low isosteric heat of adsorption (27.6 kJ mol−1), which is independent from the fractional surface coverage of CO2. Furthermore, we demonstrate that the pore size plays a crucial role in elevating the CO2 adsorption capacity, surpassing the effect of Brunauer–Emmett–Teller specific surface area.

Journal or Publication Title: Journal of Materials Research
Volume: 30
Number: 19
Publisher: Cambridge University Press
Uncontrolled Keywords: carbon dioxide, adsorption, porosity
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 10 Nov 2015 08:58
Official URL: http://dx.doi.org/10.1557/jmr.2015.165
Identification Number: doi:10.1557/jmr.2015.165
Funders: The research leading to these results has received funding from the European Union Seventh Framework Program (FP7/2007-2013) under grant agreement no 264873 (FUNEA – Functional Nitrides for Energy Applicat ions).
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