4.6 Article

Enhancement of CO2 Sorption Uptake on Hydrotalcite by Impregnation with K2CO3

Journal

LANGMUIR
Volume 26, Issue 24, Pages 18788-18797

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/la102974s

Keywords

-

Funding

  1. Korea University
  2. Ministry of Education, Science and Technology [2009-0072025]
  3. Korea Evaluation Institute of Industrial Technology (KEIT) [2008-C-CD11-P-03-0-000] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
  4. National Research Foundation of Korea [2009-0072025] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

Ask authors/readers for more resources

The awareness of symptoms of global warming and its seriousness urges the development of technologies to reduce greenhouse gas emissions. Carbon dioxide (CO2) is a representative greenhouse gas, and numerous methods to capture and storage CO2 have been considered. Recently, the technology to remove high-temperature CO2 by sorption has received lots of attention. In this study, hydrotalcite, which has been known to have CO2 sorption capability at high temperature, was impregnated with K2CO3 to enhance CO2 sorption uptake, and the mechanism of CO2 sorption enhancement on K2CO3-promoted hydrotalcite was investigated. Thermogravimetric analysis was used to measure equilibrium CO2 sorption uptake and to estimate CO2 sorption kinetics, The analyses based on N-2 gas physisorption, X-ray diffractometry, Fourier transform infrared spectrometry, Raman spectrometry, transmission electron microscopy, scanning electron microscopy, and energy dispersive X-ray spectroscopy were carried out to elucidate the characteristics of sorbents and the mechanism of enhanced CO2 sorption. The equilibrium CO2 sorption uptake on hydrotalcite could be increased up to 10 times by impregnation with K2CO3, and there was an optimal amount of K2CO3 for a maximum equilibrium CO2 sorption uptake. In the K2CO3-promoted hydrotalcite, K2CO3 was incorporated without changing the structure of hydrotalcite and it was thermally stabilized, resulting in the enhanced equilibrium CO2 sorption uptake and fast CO2 sorption kinetics.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available