Posted by Globalization benefits economic growths, but also increases carbon-dioxide emission, that leads to climate change. Carbon capture and storage (CCS) technologies are essential to reduce these emissions and mitigate the effects of climate change.
Can cyclodextrins be effective in CO2 capturing?
Let’s find out!
More than 60 year ago, in 1957 Friedrich Cramer and Friedrich Martin Henglein [1] wrote a study about the inclusion complex of gases with cyclodextrins. It was shown that alfa-cyclodextrin when treated with CO2 under pressure for several days gave crystals with the gas trapped inside.
Let’s jump into the present: this current article digs deeper into the topic, the stochiometry of ACD and CO2 was investigated (it was found 1:1). Moreover other CD derivatives were tested for their CO2 binding propertires. The results show that the affinity can be improved with a smaller cavity (anhydro cyclodextrins) and more lipophilic (e.g. methylated) cyclodextrin derivatives [2].
References:
[1] Cramer, F.; Henglein, F. M. Chem. Ber. 1957, 90, 2572–2575. doi:10.1002/cber.19570901123
[2] Jessen, C.H, et al, Beilstein J Org Chem, 2023; 19: 1021–1027. 10.3762/bjoc.19.78