Journal of Porous Materials (2019) 26:19–27

Preparation and characterisation of carbon spheres for carbon dioxide capture

D. Sibera · U. Narkiewicz · J. Kapica · J. Serafin · B. Michalkiewicz · R. J. Wróbel · A. W. Morawski

Published online: 10 March 2018

© Springer Science+Business Media, LLC, part of Springer Nature 2018


Carbon spheres were prepared by carbonisation of phenolic resin spheres obtained using a modified Stöber method in a microwave assisted solvothermal reactor. Preparation process involved water–ethanol, ammonia water, resorcinol, potassium oxalate and formaldehyde. The mixture was stirred for 24 h at room temperature and then subjected to a pressure treatment, in which the solution was treated in a microwave assisted solvothermal reactor for 15 min at a pressure of 1–3 MPa. The  proposed synthesis resulted in a material containing microporous carbon spheres having high surface area (from 1178 to 1648 m2/g), with diameters from 200 to 350 nm, total pore volume from 0.49 to 0.78 cm3/g, and high CO2 adsorption capacity from 3.86 to 5.03 mmol/g measured at 0.1 MPa and 25 °C. Taking into account the properties of the obtained material, it can be applied as a sorbent for CO2 capture.
Keywords Carbon spheres · Carbon dioxide adsorption · Microwave solvothermal reactor