CO2 capture using three-dimensionally ordered micromesoporous carbon
| Autor: | Maryna Vorokhta, Alexander Zhigunov, Petr Sazama, Daniela Řimnáčová, Radim Pilař, Jaroslava Moravkova, Martina Švábová |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Atmospheric pressure Process Chemistry and Technology chemistry.chemical_element 02 engineering and technology Carbon nanotube 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention Adsorption Volume (thermodynamics) chemistry Chemical engineering law medicine Chemical Engineering (miscellaneous) Gravimetric analysis 0210 nano-technology Mesoporous material Waste Management and Disposal Carbon Activated carbon medicine.drug |
| Zdroj: | Journal of CO2 Utilization. 31:124-134 |
| ISSN: | 2212-9820 |
| DOI: | 10.1016/j.jcou.2019.03.001 |
| Popis: | Adsorption of CO2 on three-dimensionally ordered micromesoporous carbon with a spherical pore structure has been studied using gravimetric and manometric analyses. Adsorptive properties were compared with activated carbon and nanostructured carbon materials such as carbon nanotubes, zeolitic-imidazolate framework-derived carbon, carbon nanohorns and ordered mesoporous carbon materials. The regular spherical pores of 14–15 nm diameter with a large pore volume of 3.4 cm3 g−1 provided a very high CO2 adsorption capacity exceeding the compared carbon materials at high gas pressures (≥4 MPa and room temperature). A strong increase in the isosteric heat of CO2 adsorption with increasing surface coverage indicates that high pressure adsorption was predominantly controlled by strong quadrupole moment interactions between CO2 molecules and less intensive interactions of CO2 with the mesoporous surface. Micropores in the walls of the main spherical mesopores, with a pore volume of 0.17 cm3 g−1, provided good CO2 adsorption properties at atmospheric pressure, characterized by rectilinear isotherms and a predominant surface coverage mechanism. Analysis of the strength of CO2 interaction with the carbon adsorbent and a kinetic study of CO2 adsorption revealed excellent CO2 adsorption-desorption reversibility. |
| Databáze: | OpenAIRE |
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