Optimization of the structural characteristics of CaO and its effective stabilization yield high-capacity CO2 sorbents

Muhammad Awais Naeem, Andac Armutlulu, Qasim Imtiaz, Felix Donat, Robin Schäublin, Agnieszka Kierzkowska and Christoph R. Müller ()
Additional contact information
Muhammad Awais Naeem: Laboratory of Energy Science and Engineering, ETH Zurich
Andac Armutlulu: Laboratory of Energy Science and Engineering, ETH Zurich
Qasim Imtiaz: Laboratory of Energy Science and Engineering, ETH Zurich
Felix Donat: Laboratory of Energy Science and Engineering, ETH Zurich
Robin Schäublin: Scientific Center for Optical and Electron Microscopy, ETH Zurich
Agnieszka Kierzkowska: Laboratory of Energy Science and Engineering, ETH Zurich
Christoph R. Müller: Laboratory of Energy Science and Engineering, ETH Zurich

Nature Communications, 2018, vol. 9, issue 1, 1-11

Abstract: Abstract Calcium looping, a CO2 capture technique, may offer a mid-term if not near-term solution to mitigate climate change, triggered by the yet increasing anthropogenic CO2 emissions. A key requirement for the economic operation of calcium looping is the availability of highly effective CaO-based CO2 sorbents. Here we report a facile synthesis route that yields hollow, MgO-stabilized, CaO microspheres featuring highly porous multishelled morphologies. As a thermal stabilizer, MgO minimized the sintering-induced decay of the sorbents’ CO2 capacity and ensured a stable CO2 uptake over multiple operation cycles. Detailed electron microscopy-based analyses confirm a compositional homogeneity which is identified, together with the characteristics of its porous structure, as an essential feature to yield a high-performance sorbent. After 30 cycles of repeated CO2 capture and sorbent regeneration, the best performing material requires as little as 11 wt.% MgO for structural stabilization and exceeds the CO2 uptake of the limestone-derived reference material by ~500%.

Date: 2018
References: Add references at CitEc
Citations: View citations in EconPapers (8)

Downloads: (external link)
https://www.nature.com/articles/s41467-018-04794-5 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-04794-5

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-018-04794-5

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().