• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2011년도 추계 학술논문 발표대회
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• pp.41-42
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• 2011

The purpose of this study is not only fixation of carbon dioxide using the cement-saturated solution by wet carbonating reaction but also evaluate the possibility of storage technology of Carbon dioxide. wet carbonation is reaction of CO₂ injection by CO₂ reactor. As a result of experiment, the carbon dioxide is fixed, and high-purity Calcium Carbonate is eluted.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2012년도 춘계 학술논문 발표대회
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• pp.71-72
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• 2012

The purpose of this study is not only fixation of carbon dioxide using the cement-Paste solution's calcium ion by wet carbonating reaction but also quantitatively evaluate the possibility of storage technology of Carbon dioxide. wet carbonation is reaction of CO₂ injection by CO₂ reactor. As a result of experiment, the carbon dioxide is fixed, and high-purity Calcium Carbonate is eluted.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2009년도 춘계학술대회 논문집
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• pp.821-824
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• 2009

LFG-MGT CHP system development project with $CO_2$ enrichment in greenhouses was introduced. LFG is produced from the anaerobic digestion of landfilled waste and it has been utilized for power/heat generation since it contains around 50% of $CH_4$. Utilization of LFG from small scale landfill is also needed as well as large scale landfill. However, due to economy of scale, it is very difficult to develop business model. In this context, combining CHP system with greenhouses is considered as feasible option for LFG utilization. LFG-MGT CHP system with $CO_2$ fixation in greenhouses has been derived as an active greenhouse gas reduction strategy, The focus of the system is beyond carbon neutral LFG utilization to neutral carbon absorption. The system is feasible in terms of direct and indirect $CO_2$ emission reduction with more economical way.

• KSBB Journal
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• 제15권6호
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• pp.644-648
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• 2000

Biological fixation of carbon dioxide using microalgae is known as an effective CO$_2$reduction technology. However, many environmental factors influence microalgal productivity. Optimal cultivation factors were determined for the green alga, Euglena gracilis Z, which offers high protein and vitamin E content for animal fodder. In batch culture in a photovioreactor, it was found that theinitial pH, temperature, CO$_2$concentration in air, and light intensity during the optimal cultivating conditions were 3.5, 27$^{\circ}C$, 5-10% and 520 ${\mu}$mol/㎡/s, respectively. When tap water and freshwater were used as cultivating media unsterilized tap water was found to be effective. A kinetic model was considered to determine the relationship between the specific growth rate and the light intensity. The half-velocity coefficient (K(sub)I) in the Monod model under photoautotrophic conditions was 978.9 ${\mu}$mol/㎡/s.

• 유기물자원화
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• 제22권1호
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• pp.40-48
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• 2014

지구온난화와 이상기후현상으로 인해 온실가스가 증가함에 따라, 온실가스 감축을 위해 국가 단위의 온실가스 배출량 산정이 중요해졌다. 이에 본 연구에서는 온실가스 배출 산정의 기초자료로 활용하고자, 임의의 지역을 선정하고 임야, 초지, 논, 밭(작물), 시설원예(작물), 축사(소, 돼지), 세대(인구, 농기계), 차량 등 기본 구성단위를 설정, 탄소량 원단위와 기초 통계자료를 토대로 지역별 탄소 발생량을 실험과 문헌을 통해 산정하였다. 그 결과, 김제시의 탄소 흡수량은 772,960 ton C/year, 고정량은 487,477 ton C/year, 배출량은 1,112,607 ton C/year 로 나타났으며, 공덕면의 탄소 흡수량 55,559 ton C/year, 고정량 25,864 ton C/year, 배출량은 58,355 ton C/year로 나타났다. 황산리의 탄소 흡수량은 25,107 ton C/year, 고정량은 4,301 ton C/year, 배출량은 20,330 ton C/year 로 나타났다. 이를 통해, 각 단위마을별 특성에 따른 탄소량 산정이 가능하고, 대단위로 확대, 비교 분석하면 국가단위의 탄소 흡수 고정 배출량에 관한 기초자료를 확보 할 수 있을 것으로 판단된다.

• Journal of Ecology and Environment
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• 제38권4호
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• pp.425-436
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• 2015

The carbon cycle came into the spotlight due to the climate change and forests are well-known for their capacity to store carbon amongst other terrestrial ecosystems. The annual organic carbon of litter production, forest floor litter layer, soil, aboveground and belowground part of plant, standing biomass, net primary production, uptake of organic carbon, soil respiration, etc. were measured in Mt. Worak in order to understand the production and carbon budget of Quercus serrata forest that are widely spread in the central and southern part of the Korean Peninsula. The total amount of organic carbon of Q. serrata forest during the study period (2010-2013) was 130.745 ton C ha^-1. The aboveground part of plant, belowground part of plant, forest floor litter layer, and organic carbon in soil was 50.041, 12.510, 4.075, and 64.119 ton C ha^-1, respectively. The total average of carbon fixation in plants from photosynthesis was 4.935 ton C ha^-1 yr^-1 and organic carbon released from soil respiration to microbial respiration was 3.972 ton C ha^-1 yr^-1. As a result, the net ecosystem production of Q. serrata forest estimated from carbon fixation and soil respiration was 0.963 ton C ha^-1 yr^-1. Therefore, it seems that Q. serrata forest can act as a sink that absorbs carbon from the atmosphere. The carbon uptake of Q. serrata forest was highest in stem of the plant and the research site had young forest which had many trees with small diameter at breast height (DBH). Consequentially, it seems that active matter production and vigorous carbon dioxide assimilation occurred in Q. serrata forest and these results have proven to be effective for Q. serrata forest to play a role as carbon storage and NEP.

• 유기물자원화
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• 제8권2호
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• pp.71-76
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• 2000

미세조류를 이용한 생물학적 이산화탄소 고정화 방법은 이산화탄소를 효과적으로 제거할 수 있는 방법으로 널리 알려져 있다. 따라서 발전소 등에서 배출되는 폐탄산가스를 고정화하기 위하여 미세조류의 성장에 영향을 주는 운전 조건을 평가하였다. 본 실험에서 사용된 Euglena gracilis는 산성 조건에서도 잘 성장하여 오염의 가능성이 적고, 고농도 이산화탄소(10-20%)에 대한 내성이 강한 것으로 알려져 있다 또한, 단백질 함량이 풍부하고 세포벽이 얇아 배양 후 사료로의 이용성도 크다. 광반응기에서 회분식 배양을 이용하여 운전 조건을 평가한 결과 실험 조건에서 최적 pH는 3.5, 온도는 $27^{\circ}C$, 이산화탄소 농도는 5~10%, 광도는 $520{\mu}mol/m^2/s$로 각각 조사되었다. 또한 이러한 자료를 기초로 하여 연속 운전을 실시한 결과 $CO_2$농도 10%, HRT 4일에서 최종 건조 무게 $1.2g/{\ell}$로 높은 성장율을 얻었다.

• 한국환경과학회지
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• 제5권5호
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• pp.677-682
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• 1996

페로브스카이트 ($La_{0.9}$$Sr_{0.1}$$CuO_3$) 전극을 이용하여 이산화탄소를 메탄올, 에탄올등의 알콜류와 아세트 알데히드로 전해환원하였다. 전해환원 실험은 전류밀도 100mA/c$m^2$ 그리고 환원 전위 -2 to -2.5 V vs. Ag/AgCl에서 수행하였다. 실험결과 메탄올은 11.6%, 에탄올은 15.3% 그리고 아세트알데히드는 6.2 %의 최고효율을 나타내었다. 따라서 페로브스카이트 전극은 알콜생성 면에서 기타 다른 금속전극에 비하여 매우 우수한 효과를 보여주었다.

• 한국기후변화학회지
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• 제5권4호
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• pp.339-348
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• 2014

Agro-ecosystem plays an important role in the mitigation of atmospheric $CO_2$ concentration through photosynthesis and soil carbon fixation. The perennial crops have capacity of carbon accumulation because they have lived for years in the same position. Carbon dioxide fixation occurs in the fruit orchard by photosynthesis and soil carbon sequestration. The objectives of this review are to introduce the fruit orchard as a carbon dioxide sink and to summarize the methods that measure $CO_2$ flux in the orchard. There are three difference methods (chamber, biomass, and eddy covariance method) to measure $CO_2$ exchanges on sites. However, there is no standard method suitable for fruit cultivation condition in Korea. Thus the standard method have to be developed in order to exactly estimate the carbon accumulation. In foreign studies, the carbon assessments were conducted in apple, peach, olive, grape orchard and so on. On the other hand the estimation of $CO_2$ exchange was carried out for apple and mandarine orchard in Korea. According to these results, fruit orchard is a $CO_2$ sink even though amount of carbon accumulation is smaller than the forest. To introduce certainly fruit orchard as greenhouse gas sink, long-term monitoring and further study have to be conducted under each planting condition.

• 한국토양비료학회지
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• 제45권6호
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• pp.1211-1215
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• 2012

Terrestrial ecosystem are a strong sink of carbon. Forest ecosystem, one of them, has been expected to play an important role in climate changing process by absorbing atmospheric carbon dioxide. On the other hand, agricultural ecosystem that consists mainly of annual crops is regarded as poor contributor to carbon accumulation, because its production (carbon hydrate) is decomposed into carbon at a short period, which is emitted to the atmosphere. However, it is thought that fruit tree plays a great role in decreasing atmospheric carbon dioxide concentration, same as forest. Net ecosystem exchange of $CO_2$ (NEE) was measured to estimate carbon fixation capacity using an eddy covariance (EC) system method in 2 years from 2005 to 2006 at an apple orchard in Uiseong, Gyeongbuk. Average air temperature values were higher in 2006 than in 2005 during the dormant season, and lower by about $5^{\circ}C$ over the growing season causing visible cold injuries. Accordingly, we investigated long-term exchange of carbon to determine how much difference of carbon fixation capacity was shown between 2006 and 2005 in terms of environmental and plant variables such as NEE, leaf area index (LAI), and Albedo. NEE was $4.8Mg\;C\;ha^{-1}yr^{-1}$ in 2005 and $4.7Mg\;C\;ha^{-1}yr^{-1}$ in 2006, respectively. Low temperature after July in 2006 decreased LAI values faster than those in 2005. Meanwhile, Albedo values were higher after July in 2006 than in 2005. These results show that the low temperature after July in 2006 apparently affected apple growth.