1 research outputs found
<BOOK REVIEWS>
The
performance of zeolitic imidazolate framework-8 (ZIF-8) for
CO<sub>2</sub> capture under three different conditions (wetted ZIF-8,
ZIF-8/water slurry, and ZIF-8/water–glycol slurry) was systemically
investigated. This investigation included the study of the pore structure
stability of ZIF-8 by using X-ray diffraction, scanning electron microscopy,
Fourier transform infrared spectroscopy, and Raman detection technologies.
Our results show that the CO<sub>2</sub> adsorption ability of ZIF-8
could be substantially increased under the existence of liquid water.
However, the structure characterization of the recovered ZIF-8 showed
an irreversible change of its framework, which occurs during the CO<sub>2</sub> capture process. It was found that there is an irreversible
chemical reaction among ZIF-8, water, and CO<sub>2</sub>, which creates
both zinc carbonate (or zinc carbonate hydroxides) and single 2-methylimidazole
crystals, and therefore the pore structure of ZIF-8 collapses. It
is suggested therefore that care must be taken when using ZIF-8 or
products containing ZIF-8 for gas capture, gas separation, or other
applications where both water and acid gases coexist