• 대한공간정보학회지
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• 제20권4호
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• pp.3-9
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• 2012

화석연료 사용의 급격한 상승은 연료의 고갈과 막대한 온실가스배출을 초래했다. 특히, 건설 분야는 전체 이산화탄소 배출량의 약 1/4 이상을 차지하는 환경문제의 원천이다. 이에 본 연구에서는 건설 현장의 탄소배출량 감소를 위한 GIS기법의 적용 강화를 목표로 사토장 선정에 네트워크분석기법을 적용하였다. 그 결과 후보지별로 최단거리 및 최소시간에 따라 예상되는 탄소배출량 및 운반단가를 구할 수 있었다. 이 결과를 바탕으로 사토장을 선정할 경우 소나무 한그루를 심는 것과 비슷한 효과의 탄소배출량을 감소할 수 있을 것이다. 또한, 건설 분야 전반에서 발생하는 탄소배출에 영향을 주는 복합적인 요소들을 고려하여 적용한다면 탄소배출량을 획기적으로 줄일 수 있을 것이다.

• 한국환경보건학회지
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• 제44권6호
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• pp.599-607
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• 2018

Objectives: Carbon dioxide ($CO_2$) may be one of the biggest causes of climate change. The purposes of this study were to reduce greenhouse gases and to increase strawberry production by developing the supply devices in livestock facilities using the membrane technology Methods: Carbon dioxide was collected from beside to livestock facilities. The injection of $CO_2$ was stopped when it reached 1,000 ppm in the facility house. Case group with injection of $CO_2$ was compared to control group with normal environment. The experiments were conducted for 8 days from December 11, 2017. Results: Total strawberry production was found to be 1,317 kg in the case group and 1,176 kg in the control group. The correlation between $CO_2$ and crop yields has led to some statistical evidence that carbon dioxide helps to grow (${\beta}=0.832$, p<0.05). Conclusions: This study identified the potential for efforts to reduce the $CO_2$ in farming households. Increased concentrations of $CO_2$ have shown that strawberries have a better growth condition. In addition, it can be explained that the plants need wide leaves to quickly absorb much $CO_2$.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2022년도 가을 학술논문 발표대회
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• pp.105-106
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• 2022

Now, the world is increasingly anxious about fine dust due to abnormal temperatures caused by global warming and increased yellow dust caused by desertification, and the World Health Organization (WHO) pointed out that more than 99% of the world's population is exposed to fine dust. In this situation, the reduction rate of fine dust and carbon dioxide of the matrix was tested by using expanded graphite, an eco-friendly and porous material, to improve air quality. As a result of the test, since expanded graphite is a material that expands between layers compared to conventional graphite, the reduction rate of fine dust and carbon dioxide decreases as the replacement rate of expanded graphite increases.

• 한국응용과학기술학회지
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• 제17권1호
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• pp.49-53
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• 2000

For decompose carbon dioxide, manganese oxide was synthesized with $0.25M-MnSO_{4}{\cdot}nH_{2}O$ and 0.5M-NaOH by coprecipitation. We made magnetite deoxidized manganese oxide by hydrogen reduction for 1hour at $330^{\circ}C$. We investigated characteristics of catalyst, hydrogen reduction degree and decomposition rate of carbon dioxide. The structure of the hausmannite certified spinel type. The specific surface area of synthesized hausmannite and deoxidized hausmannite were $22.36m^{2}/g$, $33.56m^{2}/g$ respectively. The decomposition rate of $CO_{2}$ of deoxidized hausmannite was 57%.

• 한국연소학회:학술대회논문집
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• 한국연소학회 2013년도 제46회 KOSCO SYMPOSIUM 초록집
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• pp.19-20
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• 2013

The cofiring of renewable fuel in coal fired boilers is an attractive option to mitigate $CO_2$ emissions, since it is relatively low cost option for efficiently converting renewable fuel to electricity by adding biomass as partial substitute of coal. However, it would lead to reduce plant efficiency and flexibility in operation, and increase operation cost and capital cost associated with renewable fuels handling and firing equipment. The aim of this study is to investigate reduction of carbon dioxide at varying percentage of biomass in fuel blend to the boiler biomass, and estimate operation and capital cost. Wood pellet, PKS (palm kernel shell), EFB (empty fruit bunch) and sludge are considered as a renewable fuels for a cofiring with coal. Several approaches by the cofiring ratio are chosen from past plant demonstrations and commercial cofiring operation, and they are evaluated and discussed for CO2 reduction and cost estimation.

• 한국유기농업학회지
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• 제22권4호
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• pp.531-547
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• 2014

This study analyzed the effect of Greenhouse of wood pellet fuel conversing from Diesel. Analyzed through a life cycle assessment of greenhouse gas emissions of carbon dioxide for the environmental assessment, In evaluation of the Ministry of the Environment, analyzed through the life cycle assessment of carbon dioxide emissions of the greenhouse gas and, In the case of economic evaluation, we analyzed the investment payback period to the total revenue generated by each of the calculated incentive based on the RHI and institutions reduction projects a reduction of costs associated with the reduction of fuel costs.

• 한국정밀공학회지
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• 제17권9호
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• pp.196-201
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• 2000

There is a great demand for reducing the amount of material used in mass-produced plastics parts for material cost constitutes a large percentage of the total cost of a product up to 75% It may be noted that the price of plastics is directly related to the price of petroleum. Material reduction therefore decreases the amount of oil needed for the manufacture of plastics and thus help conserve this natural resource. Therefore microcellular foaming process(MCPs) was studied for solving this problems alternatively in 1980's at M. I. T. Until now in microcellular plastics processes carbon dioxide gas was mainly used for microcellular foaming Because carbon dioxide has more solubility than any other gases such as nitrogen gas or helium gas. The purpose of the this research is measurement of changing of the microcellular plastics' weight by using nitrogen gas in injection molding an comparing weight reduction of microcellular foamed plastics for using carbon dioxide gas with nitrogen gas.

• 한국지반환경공학회 논문집
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• 제25권3호
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• pp.5-11
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• 2024

이산화탄소 포집 및 지중 저장을 위해 유망한 지질학적 구조로는 대수층, 폐유전 및 가스전 등이 존재한다. 이 중 대수층은 다른 지질학적 구조에 비해 많은 양의 이산화탄소 저장이 가능한 것으로 판단됨에 따라 그 관심이 증가하고 있으며, 대수층의 특성을 반영하여 이산화탄소 저장 효율 향상을 위한 기술 개발이 필요한 실정이다. 따라서, 본 연구에서는 음이온성 계면활성제를 활용하여 공극수가 존재하는 마이크로모델 내 계면활성제 선 주입 후 초임계 이산화탄소 후속 주입에 따른 이산화탄소 저장 효율 평가를 수행하였다. 그 결과 선 주입되는 계면활성제 수용액의 농도가 증가함에 따라 이산화탄소 저장 효율이 개선되며, 농도가 낮을수록 이산화탄소 저장 효율 개선을 위한 더 많은 계면활성제의 주입이 필요한 것으로 나타난다. 또한 동일한 계면활성제 농도 조건에서 선행 연구의 계면활성제-초임계 이산화탄소 치환보다 계면활성제 선 주입 방식에서 이산화탄소 저장 효율은 약 30% 낮은 값을 나타내며, 본 연구의 최대 농도 조건에서 선행 연구와 유사한 이산화탄소 저장 효율을 나타낸다. 이러한 결과는 향후 대수층 내 이산화탄소 저장 효율 향상을 위한 계면활성제 적용 시 농도 결정에 활용될 것으로 기대된다.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2009년도 제33회 추계학술대회논문집
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• pp.191-196
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• 2009

Experiments were conducted in a constant pressure combustion chamber using schlieren system to investigate the effects of carbon dioxide/nitrogen/helium diluents on cellular instabilities of syngas-air premixed flames at room temperature and elevated pressures. Laminar burning velocities and Markstein lengths were calculated by analyzing high-speed schlieren images at various diluent concentrations and equivalence ratios. Experimental results showed substantial reduction of the laminar burning velocities and of the Markstein lengths with the diluent additions in the fuel blends. Effective Lewis numbers of helium-diluted syngas-air flames increased but those of carbon dioxide- and nitrogen-diluted syngas-air flames decreased in increase of diluents in the reactant mixtures. With helium diluent, the propensity for cells formation was significantly diminished, whereas the cellular instabilities for carbon dioxide-diluted and nitrogen-diluted syngas-air flames were not suppressed.

• Korea-Australia Rheology Journal
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• 제18권3호
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• pp.133-141
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• 2006

Carbon dioxide was absorbed into the aqueous nanometer sized colloidal silica solution of 0-31 wt% and 2-amino-2-methyl-1-propanol of $0-2kmol/m^3$ in a flat-stirred vessel with the impeller of various sizes and speeds at $25^{\circ}C$ and 0.101 MPa to measure the absorption rate of $CO_2$. The volumetric liquid-side mass transfer coefficient$(k_La)\;of\;CO_2$ was used to obtain the empirical correlation formula containing the rheological behavior of the aqueous colloidal silica solution. Reduction of the measured $k_La$ was explained by the viscoelastic properties of the aqueous colloidal silica solution. The theoretical value of the absorption rate of $CO_2$ was estimated from the model based on the film theory accompanied by chemical reaction and compared with the measured value.