Issue 13, 2020

Dry hydrated potassium carbonate for effective CO2 capture

Abstract

Dry hydrated potassium carbonate (DHPC) is a free-flowing powder prepared by uniformly mixing hydrated K2CO3 and hydrophobic nanosilica. We demonstrated that DHPCs can absorb CO2 rapidly because of their high surface-to-volume ratio. Their CO2 capture performance is superior to that of 30 wt% monoethanolamine (MEA), an industry standard. DHPC-75 (containing 75 wt% K2CO3) has a CO2 uptake capacity of 233 mg gāˆ’1 (90% saturation uptake within 13 min), higher than the widely used 30 wt% MEA aqueous solution (111 mg gāˆ’1, 90% saturation uptake within 25 min). DHPC-75 also exhibits an excellent cycling performance, thus becoming a promising candidate for practical application.

Graphical abstract: Dry hydrated potassium carbonate for effective CO2 capture

Article information

Article type
Paper
Submitted
08 Cax 2019
Accepted
30 Qas 2019
First published
01 Qad 2019

Dalton Trans., 2020,49, 3965-3969

Dry hydrated potassium carbonate for effective CO2 capture

S. Wang, Z. Liu, A. T. Smith, Y. Zeng, L. Sun and W. Wang, Dalton Trans., 2020, 49, 3965 DOI: 10.1039/C9DT01909J

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