• 한국환경과학회지
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• 제13권3호
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• pp.319-325
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• 2004

An experimental study on the preparation of monolithic porous polymers by environmentally friend process in supercritical carbon dioxide has been carried out. Polymerization mixture composed of a cross-linking monomer, initiator and functional co-polymer was charged in the reactor with sapphire window. After the system was purged with a flow of $CO_2$ for 15 min, the reactor was pressurized with liquid $CO_2$ up to 100 bars. The reactor was isolated from and placed back to the system via quick connector for shaking until the mixture had become fully homogeneous. The reactor was then heated and pressurized to the required reaction conditions and left overnight. After cooling and $CO_2$ evacuation, the polymer was removed from the reactor as dry, white, continuous monoliths. The effect of experimental conditions on the physical properties of porous polymer was systematically examined, and it was found that monomer content had a major effect on the physical properties of the polymers.

• 한국연소학회:학술대회논문집
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• 한국연소학회 2001년도 제22회 KOSCI SYMPOSIUM 논문집
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• pp.31-45
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• 2001

The effect of adding carbon dioxide to methane-air flame was investigated experimentally. Measurements included extinction limits, flame temperature and photographic investigation of flame. A diffusion flame was stabilized between counterflowing streams of methane diluted with carbon dioxide and air diluted with carbon dioxide. Extinction limits and temperature for such flames were measured over a wide parametric range and were compared with those for other flames that fuel or oxidant was diluted with nitrogen or argon. The experimental results indicate that extinction phenomena can be explained by thermal effect and as an amount of carbon dioxide in fuel or oxidant increases, greatly as compared with other flames flame-temperature falls and flame-thickness is reduced.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2011년도 추계 학술논문 발표대회
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• pp.231-233
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• 2011

Carbon dioxide in atmosphere causes concrete carbonation which is the phenomenon, that is, the pH of concrete changes from 12-13 to 8.85-10. Even though the carbon dioxide concentration of indoor is higher than that of outdoor, the micro measurement has not carried out. The concentration of carbon dioxide was measured in three places. The data was used as boundary condition to FEM analysis for expectation of concrete carbonation depth. The affect of building finish materials to concrete carbonation was discussed.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2013년도 춘계 학술논문 발표대회
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• pp.73-74
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• 2013

In this study, we examined the properties of the concrete for the adsorption of carbon dioxide by adding in photosynthetic bacteria. As for the experimental plan, we measured slump, carbon dioxide concentration and compressive strength. The findings revealed the non-plastic cement added with photosynthetic bacteria had the greatest flexibility and showed carbon dioxide absorption and condensation delay due to the sugar constituents of photosynthetic bacteria. Giver the progress in the studies on the strength development, it is estimated to be used as CO₂ reduction concrete.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2011년도 춘계 학술논문 발표대회 1부
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• pp.193-195
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• 2011

Nowadays, climatic environment change has become a major issue in the world. This causes major emissions of carbon dioxide industries steel industry, thermal power industry, cement industry is essential in the reduction of carbon dioxide, which is based on total carbon dioxide emissions account for most of the construction industry in an effort to minimize the environmental load is needed. accordingly, through case studies, It can be induce the selection to minimize environmental load by comparing the output of quantitative energy consumption and carbon dioxide emissions per constructional methods. As a result of this study, RC Structure was less environmental load than SC structure.

• 한국통신학회논문지
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• 제36권11B호
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• pp.1315-1322
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• 2011

최근 지구온난화 문제는 전 세계의 매우 심각한 환경문제로 대두되고 있으며, 이를 해결하기 위한 방안으로 '그린 IT'가 이슈화되고 있다. 이러한 상황에서 네트워크는 진화와 함께 다양한 공격기술들이 나타나고 있어, 대부분의 여러 보안장치 및 시스템들을 추가 배치하고 있다. 그러나 이와 같은 네트워크 구축방법은 내부 네트워크의 성능과 보안에 큰 영향을 미치며, $CO_2$의 배출량을 증가시키고 있다. 따라서 본 논문은 내부 네트워크의 성능저하요인에 따른 $CO_2$배출을 분석하여, 향후 내부 네트워크의 성능 및 보안성 향상과 IT분야의 $CO_2$배출을 경감하기 위한 자료로 활용될 것으로 기대한다.

• 청정기술
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• 제14권4호
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• pp.281-286
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• 2008

Polyacrylamide (PAA) 수용액의 유변학적 특성이 $CO_2$의 흡수속도에 미치는 영향을 고찰하기 위해 $25^{\circ}C$, 1기압에서 평판조의 흡수기(교반조의 임펠러 크기 0.05 m, 교반속도 50 rpm)를 사용하여 PAA 수용액에 $CO_2$의 흡수실험을 행하였다. 제시한 Deborah수와 $CO_2$의 물질전달계수와의 상관관계식으로부터 물질전달계수를 구하여 triethanolamine을 첨가한 PAA수용액에서 $CO_2$의 화학흡수속도의 산출에 사용하였다. PAA수용액에서 $CO_2$의 흡수속도는 동일점도의 기준에서 뉴튼액체에서의 값보다 감소하였다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2022년도 봄 학술논문 발표대회
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• pp.166-167
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• 2022

The International Energy Agency(IEA) recommends that intergovernmental agreements reduce CO2 emissions by 2050 to about 50% in 2005 in its report. To realize these demands, it is suggested to actively utilize energy efficiency improvement technology, renewable energy, nuclear power, carbon dioxide capture & storage technology (CCS). In the field of building materials and cement, mineral carbonization technology is widely used. Inorganic by-products applicable to greenhouse gas storage include waste concrete, slag, coal ash, and gypsum. If the Mineral Carbonation Act is used, it is expected that about 12 million tons of greenhouse gases can be immobilized every year. Greenhouse gas immobilization using cement hydrate can be immobilized by injecting carbon dioxide into the hydrated products C-S-H, and Ca(OH)2. In the case of immobilization through concrete carbonization, a carbon dioxide promotion test is used, which is often different from the actual carbon dioxide carbonization reaction. If the external carbon dioxide concentration is abnormally higher than the reality, it is thought that it will be different from the actual reaction. In this study, the carbonation phenomenon according to the concentration and identification of the carbon dioxide reaction mechanism of cement hydrate was to be considered.

• The Korean Journal of Ecology
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• 제23권1호
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• pp.39-43
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• 2000

1996년 7월 하순부터 9월 하순에 걸쳐 동경농공대학 농학부 부속부중농장(동경도 부중시)의 대두(Glycine max)개체군을 대상으로 미기상학적 플럭스측정방법의 하나인 열수지법을 이용하여 CO₂ 플럭스와 O₃ 플럭스를 측정하였다. CO₂ 플럭스와 O₃ 플럭스는 엽면적지수(LAI)의 변화에 영향을 받았으며, LAI가 2.0이상일 경우 CO₂ 플럭스는 광합성유효발사량(PAR)과 정비례관계가 있었다. O₃ 플럭스는 측정 기간 중 항상 양의 수치를 나타냈으며, 평균치는 0.5 mol m/sup -2/S/sup -1/이었다. 또한 CO₂와 O₃ 침착속도사이에는 정비례관계가 있었다 (LAI>2.0).

• 상하수도학회지
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• 제22권3호
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• pp.373-378
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• 2008

The pH & alkalinity adjustment method by lime and carbon dioxide($CO_2$) for corrosion control in water distribution system was investigated to determine the optimum operational condition in lime adding process in water treatment plant(WTP). The mixing time at dissolution tank and sedimentation time at saturator for maintaining optimal turbidity condition of lime supernatant were 60~75 minutes and 75~95 minutes, respectively. There was no difference according to $CO_2$ adding methods such as $CO_2$ saturated water or $CO_2$ gas. But, $CO_2$ saturated water could be convenience at WTP in terms of pH control and quantitative dosing. To minimize generation of calcium carbonate products, the short time interval between adding of lime and $CO_2$ is most important. The lime should be added below 32 mg/l for preventing pH rising and generation of calcium carbonate products at the heating condition.