Pressureless and Low-Pressure Synthesis of Microporous Carbon Spheres Applied to CO2 Adsorption
Ładowanie...
Data
2020-10-13
Tytuł czasopisma
ISSN czasopisma
Tytuł tomu
Wydawca
MDPI
Abstrakt
In this work, low-pressure synthesis of carbon spheres from resorcinol and formaldehyde
using an autoclave is presented. The influence of reaction time and process temperature as well as
the e ect of potassium oxalate, an activator, on the morphology and CO2 adsorption properties was
studied. The properties of materials produced at pressureless (atmospheric) conditions were compared
with those synthesized under higher pressures. The results of this work show that enhanced pressure
treatment is not necessary to produce high-quality carbon spheres, and the morphology and porosity
of the spheres produced without an activation step at pressureless conditions are not significantly
di erent from those obtained at higher pressures. In addition, CO2 uptake was not a ected by elevated
pressure synthesis. It was also demonstrated that addition of the activator (potassium oxalate) had
much more e ect on key properties than the applied pressure treatment. The use of potassium oxalate
as an activator caused non-uniform size distribution of spherical particles. Simultaneously higher
values of surface area and total pore volumes were reached. A pressure treatment of the carbon
materials in the autoclave significantly enhanced the CO2 uptake at 25 C, but had no e ect on it at
0 C.
Opis
Słowa kluczowe
carbon spheres, carbon nanospheres, carbon dioxide adsorption, autoclave, low-pressure synthesis, pressureless, resorcinol
Cytowanie
Pełech, I. (2020). Pressureless and Low-Pressure Synthesis of Microporous Carbon Spheres Applied to CO2 Adsorption. Molecules, 25, 5328. doi 10.3390/molecules25225328.