Higher CO2 absorption using a new class of calcium hydroxide (Ca(OH)2) nanoparticles

With rising atmospheric carbon dioxide (CO 2 ) concentrations globally, there is an urgent need for highly efficient CO 2 capture technologies. This report introduces an innovative technology to remove CO 2 of point sources using calcium hydroxide (Ca(OH) 2 ) nanoparticles of 10 nm. Superior to regu...

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Bibliographic Details
Published in:Environmental chemistry letters 2018-09, Vol.16 (3), p.1095-1100
Main Authors: Zhang, Huiying, Liu, Ruiqiang, Ning, Tangyuan, Lal, Rattan
Format: Article
Language:English
Subjects:
Absorption
Air quality
Analytical Chemistry
Calcium
Calcium hydroxide
Capacity
Carbon dioxide
Carbon sequestration
Climate change
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Gases
Geochemistry
Global warming
Hydroxides
Nanoparticles
New class
Nitrogen compounds
Original Paper
Outdoor air quality
Oxides
Point source pollution
Pollution
Pollution sources
Removal
Retention time
Slaked lime
Washing
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Summary:With rising atmospheric carbon dioxide (CO 2 ) concentrations globally, there is an urgent need for highly efficient CO 2 capture technologies. This report introduces an innovative technology to remove CO 2 of point sources using calcium hydroxide (Ca(OH) 2 ) nanoparticles of 10 nm. Superior to regular CO 2 absorption methods, the nano-Ca(OH) 2 chemically increased reactive surface area and gas retention time of the scrubbing system. Experimental data show that CO 2 absorption capacity of the nano-suspension was over 8 times higher than that of the regular Ca(OH) 2 particles of 2 µm in size. In addition to CO 2 removal, nano-Ca(OH) 2 also has high potential to treating acidic gases such as HCl, SO x , or NO x , for improving air quality and offsetting the global warming trend. This is the first study on using Ca(OH) 2 nanoparticles for efficient CO 2 capture.
ISSN:1610-3653
1610-3661
DOI:10.1007/s10311-018-0729-4