title: The development of effective CaO-based CO2sorbents via a sacrificial templating technique.
abstract: A carbon-based sacrificial templating approach was employed to realize single-pot synthesis of cyclically stable CaO-based CO2sorbents. The sacrificial carbonaceous template was formed through resorcinol-formaldehyde polymerization reaction. The resultant sorbents following the thermal decomposition of the carbonaceous template featured an inverse opal-like macrostructure composed of a highly porous nanostructured backbone. In addition to pure CaO, sorbents supported with Al2O3, MgO, Y2O3, and ZrO2were synthesized. SEM and XRD were utilized to characterize the morphology and the chemical composition of the synthetic CO2sorbents, respectively. The cyclic CO2uptake performance of the synthetic sorbents was assessed by TGA and compared to limestone. All of the synthetic sorbents exhibited an improved CO2uptake performance when compared to limestone. The performance enhancement became more pronounced in the case of supported sorbents. The sorbent with the best CO2uptake performance was supported by a mixture of Al2O3and Y2O3, and exhibited a CO2uptake of 0.61 g CO2/g CaO after 10 cycles of calcination and carbonation under practically relevant operating temperatures, which exceeded the CO2uptake of limestone by more than 350%.
authors.affiliation: Laboratory of Energy Science and Engineering, Institute of Energy Technology, ETH Zurich, Leonhardstrasse 21, 8092 Zurich, Switzerland. naeemm@student.ethz.ch aandac@ethz.ch.
authors.forename: Muhammad Awais
authors.initials: MA
authors.lastname: Naeem
authors.affiliation: Laboratory of Energy Science and Engineering, Institute of Energy Technology, ETH Zurich, Leonhardstrasse 21, 8092 Zurich, Switzerland. naeemm@student.ethz.ch aandac@ethz.ch.
authors.forename: Andac
authors.initials: A
authors.lastname: Armutlulu
authors.affiliation: Laboratory of Energy Science and Engineering, Institute of Energy Technology, ETH Zurich, Leonhardstrasse 21, 8092 Zurich, Switzerland. naeemm@student.ethz.ch aandac@ethz.ch.
authors.forename: Marcin
authors.initials: M
authors.lastname: Broda
authors.affiliation: Institute of Inorganic Chemistry, ETH Zurich, Vladimir-Prelog-Weg 3, CH-8093 Zürich, Switzerland.
authors.forename: Dmitry
authors.initials: D
authors.lastname: Lebedev
authors.affiliation: Laboratory of Energy Science and Engineering, Institute of Energy Technology, ETH Zurich, Leonhardstrasse 21, 8092 Zurich, Switzerland. naeemm@student.ethz.ch aandac@ethz.ch.
authors.forename: Christoph R
authors.initials: CR
authors.lastname: Müller