High-Temperature CO2 Sorption on Hydrotalcite Having a High Mg/Al Molar Ratio

Suji Kim; Sang Goo Jeon; Ki Bong Lee

doi:10.1021/acsami.5b12598

High-Temperature CO2 Sorption on Hydrotalcite Having a High Mg/Al Molar Ratio

ACS Appl Mater Interfaces. 2016 Mar 9;8(9):5763-7. doi: 10.1021/acsami.5b12598. Epub 2016 Feb 29.

Authors

Suji Kim¹, Sang Goo Jeon², Ki Bong Lee¹

Affiliations

¹ Department of Chemical and Biological Engineering, Korea University , 145 Anam-ro, Seongbuk-gu, Seoul 136-713, Republic of Korea.
² Climate Change Research Division, Korea Institute of Energy Research , 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea.

PMID: 26927529
DOI: 10.1021/acsami.5b12598

Abstract

Hydrotalcites having a Mg/Al molar ratio between 3 and 30 have been synthesized as promising high-temperature CO2 sorbents. The existence of NaNO3 in the hydrotalcite structure, which originates from excess magnesium nitrate in the precursor, markedly increases CO2 sorption uptake by hydrotalcite up to the record high value of 9.27 mol kg(-1) at 240 °C and 1 atm CO2.

Keywords: CO2 sorption; Mg/Al ratio; high temperature; hydrotalcite; sorbent.

Publication types

Research Support, Non-U.S. Gov't