Evaluation of Chemical Pre-treatment for the Optimization of CO2 Fixatiom Using by Carbonation Reaction with Serpentine

이산화탄소 광물고정화 효율 증가를 위한 사문석의 화학적 전처리에 관한 연구

  • Jang, Na Hyung (Division of Energy Systems Research, AjouUniversity) ;
  • Shim, Hyun Min (Division of Energy Systems Research, AjouUniversity) ;
  • Hua, Xu Li (Division of Energy Systems Research, AjouUniversity) ;
  • Kim, Hyung Teak (Division of Energy Systems Research, AjouUniversity)
  • 장나형 (아주대학교 에너지시스템학부) ;
  • 심현민 (아주대학교 에너지시스템학부) ;
  • 허려화 (아주대학교 에너지시스템학부) ;
  • 김형택 (아주대학교 에너지시스템학부)
  • Received : 2008.07.16
  • Accepted : 2008.09.01
  • Published : 2008.10.10

Abstract

The proposed $CO_2$ storage technology in the present study is a one-step sequestration process that stabilizes $CO_2$ in a reactor with Serpentine. The advantage of this technology is associated with its high stability of final product so that the entire system is recognized as permanent environment-friendly $CO_2$ removal method. Since the sequestration reaction mechanisms are generally understood that carbonation reaction proceeds with very slow rate, so that pretreatment method to increases reaction rate of $CO_2$ carbonation reaction should be developed. To increase the reactivity of Serpentine with $CO_2$, two different methods of pretreatment are carried out in the present investigation. One is heat-treatment, the other is chemical pretreatment. In this study, only chemical pretreatment is considered leaching method of magnesium from Serpentine using sulfuric acid at the various reaction temperatures, times, and acid concentrations. Experimental results illustrated that pretreatment by sulfuric acid increases surface area of serpentine from $11.1209m^2/g$ to $98.7903m^2/g$ and extracts magnesium compounds. Single variable experiment demonstrated the enhancements of magnesium extraction with increased reaction temperature and time. Amount of magnesium extraction is obtained by using the data of ICP-AES as maximum extraction condition of magnesium is 2 M acid solution, $75^{\circ}C$ and 1hr. After performing chemical pretreatment, carbonation yield increased from 23.24% to 46.30% of weight.

Keywords

leaching;serpentine;carbonation;$CO_2$

Acknowledgement

Supported by : 에너지관리공단

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