CHEMISTRYSELECT, vol.9, pp.1-13, 2024 (SCI-Expanded)
The production of affordable advanced porous materials is
necessary for applications involving the capture of CO2. This
study aimed to investigate the use of inexpensive liquid
precursors in the production of CO2 sorbents. Porous precursors
were produced through solvothermal processing of ethylene
glycol via dehydration using sulfuric acid. Various pyrolysis and
activation techniques were utilized on a carbon precursor to
examine how different heat treatment methods affect surface
chemical properties and the behavior of static CO2 adsorption
at temperatures of 273 K, 298 K, and 313 K. Out of the studied
carbons, the urea-treated pyrolyzed sample exhibited a CO2
uptake capacity of 0.93 mmolg 1 at a pressure of 0.15 bar and a
temperature of 298 K. This carbon exhibited a remarkable CO2/
N2 selectivity of 46, mainly due to its microporosity and a
nitrogen content of 8.3 atomic percent. Moreover, the investigation
of adsorption and chemical properties unveiled that
nonoxidized sulfur exhibits favorable effects on CO2 adsorption,
particularly at the temperature of 298 K. This study provides
evidence that liquid precursors can be effectively employed to
generate porous doped functional carbons or precursors using
solvothermal conditions.