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- W2525826920 abstract "이산화탄소 지중저장 기술은 이산화탄소 저감을 위한 가장 효과적인 방법 중 하나로 주목받고 있다. 본 연구에서는 이산화탄소 저장조건을 실험실에서 모사하였다. 사암과 셰일 시료를 1M NaCl 용액에 포화시킨 후 <TEX>$45^{circ}C$</TEX>, 10기압의 조건에서 4주 동안 반응시키며 물리적 성질과 미세구조적 성질의 변화를 측정하였다. 부피, 밀도, 탄성파속도, 포아송비, 동탄성계수 등 모든 항목에서 사암 시료에 비해 셰일 시료의 물리적 성질 변화가 크게 나타났다. X선 단층촬영을 통한 미세구조 분석 결과 두 가지 시료 모두에서 공극의 총개수가 감소하였고, 각각의 공극들이 가지는 평균 부피, 평균 표면적, 평균 등가직경 등이 변화하였다. 이는 이산화탄소와 광물의 반응으로 인한 점토 광물의 팽창 및 유출이 원인인 것으로 판단된다. 본 연구결과는 이산화탄소 지중저장 시 발생되는 암반의 물리적, 미세구조적 변화를 예측하는 데 효과적으로 이용될 것으로 기대된다. Underground <TEX>$CO_2$</TEX> storage technology is one of the most effective methods to reduce atmospheric <TEX>$CO_2$</TEX>. In this study, <TEX>$CO_2$</TEX> storage condition was simulated in the laboratory. Sandstone and shale specimens were saturated in 1M NaCl and were reacted at <TEX>$45^{circ}C$</TEX>, 10 atm for 4 weeks. The physical and microstructural properties of rock specimens were measured. Variations on physical properties of shale specimens were bigger than those of sandstone specimens, such as volume, density, elastic wave velocity, Poisson's ratio and Young's modulus. Microstructure were analyzed using X-ray computed tomography. Total number of pores were decreased, and average volume, average area and average equivalent diameter of each pore were changed after <TEX>$CO_2$</TEX> reaction. Swelling and leakage of clay mineral caused by <TEX>$CO_2$</TEX>-mineral reaction were the reason of changes. The results of this study can be applied to predict the physical and microstructural changes in underground <TEX>$CO_2$</TEX> storage condition." @default.
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- W2525826920 date "2016-08-31" @default.
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- W2525826920 title "Variation of the Physical-microstructural Properties of Sandstone and Shale Caused by CO2Reaction in High Pressure Condition" @default.
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- W2525826920 doi "https://doi.org/10.7474/tus.2016.26.4.293" @default.
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