This study examined the factors affecting mineral carbonation to sequester CO 2 using coal fly ash (CFA) in aqueous solutions under ambient temperature and pressure conditions. Serial extraction and carbonation tests were conducted on CFA obtained from a coal-fired power plant as the following conditions were varied: solid dosage, CaO content, CO 2 flow rate, and solvent type. The solid dosage, CaO content, and solvent type affected the Ca extraction efficiency, which was well correlated with the carbonation efficiency. In addition, at a given Ca extraction efficiency, the CO 2 flow rate and the solvent type affected the rate and extent of CFA carbonation. Based on the study results, the CO 2 sequestration capacity of CFA under ambient temperature and pressure conditions was approximately 0.008kg of CO 2 per 1kg of CFA at the experimental test conditions (CaO content: 7wt.%, solid dosage: 100g/L, CO 2 flow rate: 2mL/min, and solvent: DI water).
Bibliographical noteFunding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (grant number: 2009-0076614 ).
- Aqueous carbonation
- Coal fly ash
- Mineral carbonation
ASJC Scopus subject areas
- General Chemistry
- Environmental Chemistry
- General Chemical Engineering
- Industrial and Manufacturing Engineering