title: High-Temperature CO2 Sorption on Hydrotalcite Having a High Mg/Al Molar Ratio.
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.
authors.affiliation: Department of Chemical and Biological Engineering, Korea University , 145 Anam-ro, Seongbuk-gu, Seoul 136-713, Republic of Korea.
authors.forename: Suji
authors.initials: S
authors.lastname: Kim
authors.affiliation: Climate Change Research Division, Korea Institute of Energy Research , 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea.
authors.forename: Sang Goo
authors.initials: SG
authors.lastname: Jeon
authors.affiliation: Department of Chemical and Biological Engineering, Korea University , 145 Anam-ro, Seongbuk-gu, Seoul 136-713, Republic of Korea.
authors.forename: Ki Bong
authors.initials: KB
authors.lastname: Lee
keywords: CO2 sorption; Mg/Al ratio; high temperature; hydrotalcite; sorbent