Inverse Opal-Like, Ca3Al2O6-Stabilized, CaO-Based CO2 Sorbent: Stabilization of a Highly Porous Structure To Improve Its Cyclic CO2 Uptake
Abstract
Effective CO2 sorbents were manufactured utilizing inverse opal (IO)-like, CaO-based structures enabled by carbon nanosphere templates. To stabilize the structures against sintering, Ca3Al2O6 was incorporated via three different routes (i.e., one-pot synthesis, impregnation, and atomic layer deposition (ALD)). The sorbents realized through one-pot and ALD-assisted synthesis methods exhibited a significantly enhanced CO2 uptake when compared to the benchmark limestone and the sorbent realized by postsynthesis impregnation. The differences in the performances of the materials were rationalized by relating the textural properties of the material to the CO2 uptake in the kinetically controlled and diffusion-limited carbonation stages. We observe that both the kinetically and diffusion-limited carbonation stages are critically linked to the volume in pores with dpore < 100 nm and the surface area of the material. Mehr anzeigen
Persistenter Link
https://doi.org/10.3929/ethz-b-000366080Publikationsstatus
publishedExterne Links
Zeitschrift / Serie
ACS Applied Energy MaterialsBand
Seiten / Artikelnummer
Verlag
American Chemical SocietyThema
Inverse opal-like structure; Hierarchiacal porosity; Carbon sphere template; Calcium oxide; Ca3Al2O6 stabilizer; CO2 captureOrganisationseinheit
03865 - Müller, Christoph R. / Müller, Christoph R.
Förderung
156015 - Next generation CaO-based CO2 sorbents: X-ray absorption spectroscopy and advanced electron microscopy techniques (SNF)