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Regulating extra-framework cations in faujasite zeolites for capture of trace carbon dioxide

DOI: 10.1002/chem.202201659 DOI Help

Authors: Shanshan Liu (Nankai University) , Yinlin Chen (The University of Manchester) , Bin Yue (Nankai University) , Chang Wang (Nankai University) , Bin Qin (Nankai University) , Yuchao Chai (Nankai University) , Guangjun Wu (Nankai University) , Jiangnan Li (The University of Manchester) , Xue Han (The University of Manchester) , Ivan Da Silva (ISIS) , Pascal Manuel (ISIS) , Sarah J. Day (Diamond Light Source) , Naijia Guan (Nankai University) , Stephen P. Thompson (Diamond Light Source) , Sihai Yang (The University of Manchester) , Landong Li (Nankai University)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Chemistry – A European Journal

State: Published (Approved)
Published: June 2022
Diamond Proposal Number(s): 29649

Abstract: The development of cost-effective sorbents for direct capture of trace CO 2 (<1%) from the atmosphere is an important and challenging task. Natural or commercial zeolites are promising sorbents, but their performance in adsorption of trace CO 2 has been poorly explored to date. Herein, we report a systematic study on capture of trace CO 2 by commercial faujasite zeolites, where we found that the extra-framework cations played a key role on their performance. Under dry conditions, Ba-X displays high dynamic uptake of 1.79 and 0.69 mmol g -1 at CO 2 concentrations of 10000 and 1000 ppm, respectively, and shows excellent recyclability in the temperature-swing adsorption processes. K-X exhibits perfect moisture resistance, and >95 % dry CO 2 uptake can be preserved under relative humidity of 74%. In situ solid-state NMR spectroscopy, synchrotron X-ray diffraction and neutron diffraction reveal two binding sites for CO 2 in these zeolites, namely the basic framework oxygen atoms and the divalent alkaline earth metal ions. This study unlocks the potential of low-cost natural zeolites for applications in direct air capture.

Journal Keywords: CO2 capture; extra-framework cations; faujasite; structure; structure-performance relationship

Diamond Keywords: Carbon Capture and Storage (CCS); Gas Separation

Subject Areas: Chemistry, Materials, Environment

Instruments: I11-High Resolution Powder Diffraction

Other Facilities: WISH at ISIS

Added On: 22/06/2022 10:46

Discipline Tags:

Zeolites Earth Sciences & Environment Climate Change Chemistry Materials Science Inorganic Chemistry

Technical Tags:

Diffraction X-ray Powder Diffraction