Carbon dioxide adsorption in graphene sheets

By A. Mishra, Sundara Ramaprabhu. 2011

159 citations recorded by the source corpus.

Control over the CO2 emission via automobiles and industrial exhaust in atmosphere, is one of the major concerns to render environmental friendly milieu. Adsorption can be considered to be one of the more promising methods, offering potential energy savings compared to absorbent systems. Different carbon nanostructures (activated carbon and carbon nanotubes) have attracted attention as CO2 adsorbents due to their unique surface morphology. In the present work, we have demonstrated the CO2adsorption capacity of graphene, prepared via hydrogen induced exfoliation of graphitic oxide at moderate temperatures. The CO2adsorption study was performed using high pressure Sieverts apparatus and capacity was calculated by gas equation using van der Waals corrections. Physical adsorption of CO2 molecules in graphene was confirmed by FTIR study. Synthesis of graphene sheets via hydrogen exfoliation is possible at large scale and lower cost and higher adsorption capacity of as prepared graphene compared to other carbon nanostructures suggests its possible use as CO2 adsorbent for industrial application. Maximum adsorption capacity of 21.6 mmole/g was observed at 11 bar pressure and room temperature (25 oC).

Subfields: Materials Chemistry, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/bef7b85b0dad6b17f656f407018be338575968de

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In Materials Chemistry

1. Nery Villegas‐Escobar
2. D. Cortés-Arriagada
3. Zhengxiao Guo
4. Daniela E. Ortega
5. Srinivas Gadipelli

In Mechanical Engineering

1. Zhengxiao Guo
2. Srinivas Gadipelli

Citations in the corpus

• Fe-doped graphene nanosheet as an adsorption platform of harmful gas molecules (CO, CO2, SO2 and H2S), and the co-adsorption in O2 environments (2018, background): “For instance, the adsorption abilities of graphene towards toxic gaseous species (such as CO2, CO, NO2, NH3) have been well described[9, 11, 14-19].”
• Graphene-based materials: synthesis and gas sorption, storage and separation (2015, background): “6 mmol/g at 11 bar and 298 K is reported in a hydrogen exfoliated graphene (HEG) with a wide distribution of mesopores and SSA of 443 m(2)/g [210].”