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Received June 23, 2012
Accepted July 25, 2012
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코발트계 페라이트 분말을 이용한 이산화탄소 전환특성

Characteristics of CO2 Conversion Using Cobalt Ferrite Powders

한국에너지기술연구원 온실가스연구단, 305-343 대전광역시 유성구 가정로 102
Greenhouse Gas Department, Korea Institute of Energy Research, 102 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Korea
redsoil@kier.re.kr
Korean Chemical Engineering Research, December 2012, 50(6), 1008-1014(7), 10.9713/kcer.2012.50.6.1008 Epub 29 November 2012
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Abstract

국내의 경우 배출되는 이산화탄소의 양은 연간 6억톤 이상으로 대기로의 방출을 막기 위해 이 중 일부를 포집하여 저장을 하여야 하나, 아직 적당한 저장소를 발견하지 못한 상태이다. 따라서 포집된 이산화탄소의 일부를 다시 유용한 탄소원으로 전환하여 사용하고자 하는 연구가 많이 진행되고 있다. 본 연구의 목적은 안정한 이산화탄소를 보다 적은 에너지원을 사용하여 유용한 탄소자원을 만드는데 있다. 이를 위해 환원가스와 금속계 산화물(활성화제)이 필요하다. 따라서 환원가스는 수소를 사용하였고, 활성화제로는 코발트계 페라이트를 사용하였다. 활성화제는 제법에 따라 물성에 대한 차이가 있을 것으로 판단하여 고상법과 수열합성법을 이용해 제조된 분말을 사용하여 각각 이산화탄소 분해 특성 연구를 수행하였다. 이산화탄소의 분해 특성을 관찰하기 위해 TPR/TPO와 TGA 장치를 사용하였다. TPR/TPO를_x000D_ 이용한 CO2에 의한 흡착분해 곡선면적을 측정한 결과 고상법으로 제조된 활성화제 중 CoO의 함량이 5와 10 wt%일 때 우수한 성능을 나타내었다. 마찬가지로 TGA를 이용한 실험결과에서도 고상법에 의해 제조된 시료가 수소에 의한 흡착환원이 29.0 wt% 발생하였고, CO2에 의한 산화량도 27.5 wt%로 가장 높게 나타났다. 그리고 CO2의 분해효율이 95%로 우수한 이산화탄소 전환 특성을 나타내었다.
The amount of domestic carbon dioxide emissions is more than 600 million tons/year. The emitted CO2 should be captured and stored, however, suitable storage sites have not been found yet. A lot of researches on the conversion of captured carbon dioxide to useful carbon source have been conducted. The purpose of this study is to convert stable carbon dioxide to useful resources using less energy. For this purpose reducing gas and metallic oxide (activator) are required. Hydrogen was used as reducing gas and cobalt ferrite was used as activator. Considering that activator has different physical properties depending on synthesis methods, activator was prepared by hydrothermal synthesis and solid method. Decomposition characteristics of carbon dioxide were investigated using synthesized powders. Temperature_x000D_ programmed reduction/oxidation (TPR/TPO) and thermogravimetric analyzer (TGA) device were used to observe the decomposition characteristics of carbon dioxide. Activator prepared by solid method with 5 and 10 wt% CoO content showed an excellent performance. In TGA experiments with samples prepared by the solid method, reduction by hydrogen was 29.0 wt% and oxidation by CO2 was highest in 27.5 wt%. 95% of adsorbed CO2 was decomposed with excellent oxidation-reduction behaviors.

References

Operating Regulations of Emission Trading Demonstration Project in Industry and Power Generation Field, Ministry if Knowledge Economy (2012)
Tamaura Y, Tabata M, Nature., 346, 255 (1990)
Tamaura Y, Nishizawa K, Energy Convers. Mgmt., 33(5-8), 573 (1992)
Kodama T, Sano T, Yoshida T, Tsuji M, Tamaura Y, Carbon., 33(10), 1443 (1995)
Akanuma K, Nishizawa K, Kodama T, Tabata M, Mimori K, Yoshida T, Tsuji M, Tamaura Y, J. Material science., 28, 860 (1993)
Wada Y, Yoshida T, Tsuji M, Tamaura Y, Energy Convers. Mgmt., 36(6-9), 641 (1995)
Park SY, Kang MP, Rhee YW, Nam SC, Korean Chem. Eng. Res., 43(6), 751 (2005)
Smit J, Wijn HPJ, “Intrinsic Properties of Ferrites with Spinal Structure,” Philips Tech. Lob., Eindhoven, 135 (1959)
Shin HS, “A Study on the Ferrite Structures by Power X-Ray Diffraction Method,” Phd. Thesis (1992)
Kim YH, Lee HI, J. Korean Ind. Eng. Chem., 10(8), 1161 (1999)

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