TY - JOUR
T1 - Hydrogen peroxide-treated glycerol sourced porous carbon with elemental sulfur-based sulfur-phosphorus co-doping for CO2 capture
AU - Guerrero Peña, Gerardo D.J.
AU - Varghese, Anish Mathai
AU - Kuppireddy, Suresh
AU - Hart, Phil
AU - Bojesomo, Rukayat
AU - Alamoodi, Nahla
AU - Karanikolos, Georgios
AU - Raj, Abhijeet
AU - Elkadi, Mirella
N1 - Publisher Copyright:
© 2025 Elsevier B.V.
PY - 2025/3/15
Y1 - 2025/3/15
N2 - In this work, glycerol and elemental sulfur-based porous carbon adsorbents with sulfur‑phosphorus co-doping and subsequent H2O2 treatment were developed for CO2 capture. The best adsorbent for capturing CO2 among the developed adsorbents was P‑carbon-2000mgS-H2O2, which had surface area of 652 m2/g, a total pore volume of 0.446 cm3/g, an average pore size of 2.74 nm, narrow micropore distribution, X-ray photoelectron spectroscopy (XPS)-based sulfur content of 5.7 at.% and phosphorus content of 3.7 at.%, Raman-based average PAHs size of 24.9 Å and a defect density of 4.47 × 1011 cm−2, and X-ray diffraction (XRD)-based nano-crystallite height of 11.15 Å and length of 23.35 Å. The CO2 adsorption capacity of P‑carbon-2000mgS-H2O2 was 1.95 mmol/g at 25 °C and 1 bar (3.02 mmol/g at 0 °C), and it also demonstrated an impressive CO2 selectivity over N2 at 25 °C, with 15.24 at 0.5 bar and 12.03 at 1 bar. In addition to cyclic performance, the isosteric heat of CO2 adsorption, which was found to be between 22 and 23 kJ/mol, suggested that a physical mechanism predominated the CO2 interaction with active sites. These findings suggest that employing elemental sulfur to produce glycerol-derived porous carbon with sulfur-phosphorus co-doping and subsequent H2O2 treatment is an effective method to produce CO2 capture adsorbents, facilitating the usage of glycerol and elemental sulfur - based products for large-scale applications.
AB - In this work, glycerol and elemental sulfur-based porous carbon adsorbents with sulfur‑phosphorus co-doping and subsequent H2O2 treatment were developed for CO2 capture. The best adsorbent for capturing CO2 among the developed adsorbents was P‑carbon-2000mgS-H2O2, which had surface area of 652 m2/g, a total pore volume of 0.446 cm3/g, an average pore size of 2.74 nm, narrow micropore distribution, X-ray photoelectron spectroscopy (XPS)-based sulfur content of 5.7 at.% and phosphorus content of 3.7 at.%, Raman-based average PAHs size of 24.9 Å and a defect density of 4.47 × 1011 cm−2, and X-ray diffraction (XRD)-based nano-crystallite height of 11.15 Å and length of 23.35 Å. The CO2 adsorption capacity of P‑carbon-2000mgS-H2O2 was 1.95 mmol/g at 25 °C and 1 bar (3.02 mmol/g at 0 °C), and it also demonstrated an impressive CO2 selectivity over N2 at 25 °C, with 15.24 at 0.5 bar and 12.03 at 1 bar. In addition to cyclic performance, the isosteric heat of CO2 adsorption, which was found to be between 22 and 23 kJ/mol, suggested that a physical mechanism predominated the CO2 interaction with active sites. These findings suggest that employing elemental sulfur to produce glycerol-derived porous carbon with sulfur-phosphorus co-doping and subsequent H2O2 treatment is an effective method to produce CO2 capture adsorbents, facilitating the usage of glycerol and elemental sulfur - based products for large-scale applications.
KW - Co-doping
KW - CO adsorption
KW - Elemental sulfur
KW - Glycerol
KW - HO treatment
KW - Phosphorus
KW - Porous carbon
KW - Waste upcycling
UR - http://www.scopus.com/inward/record.url?scp=85219049954&partnerID=8YFLogxK
U2 - 10.1016/j.scitotenv.2025.178967
DO - 10.1016/j.scitotenv.2025.178967
M3 - Article
C2 - 40020584
AN - SCOPUS:85219049954
SN - 0048-9697
VL - 969
JO - Science of the Total Environment
JF - Science of the Total Environment
M1 - 178967
ER -