• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 2006.05a
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• pp.180-183
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• 2006

• Plant Journal
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• v.10 no.1
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• pp.34-39
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• 2014

Simulation works for comparing removal capabilities of acid gases contained in natural gas among several aqueous amine absorbents using commercial process simulator PROMAX(BR&E Co.) were carried out. Amine aqueous solution used in this study were 30 wt% MEA, 30 wt% DEA, 50 wt% MDEA, and 50 wt% MDEA with 3 wt% piperazine as additive. We obtained the simulated results that while MEA aqueous solution is relatively capable of more $CO_2$ gas, but DEA, MDEA, MDEA aqueous solutions with piperazine as additive are capable of more $H_2S$ gas. Also, we found that 30 wt% MDA aqueous solution is the smallest circulate rate of lean amine solution, and 50 wt% MDEA aqueous solution with 3 wt% piperazine as additive is the smallest heat duty in stripping unit. 50 wt% MDEA aqueous solution with 3 wt% piperazine as additive is found less amine circulation rate than 50 wt% MDEA due to the introduction of additive.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2002.04a
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• pp.35-36
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• 2002

대기중에 존재하는 가스상ㆍ입자상 오염물질은 그 형태와 발생원, 함유물질 등이 매우 다양하며, 특히 산성가스와 에어로졸은 스모그 현상의 원인물질로서 수명단축과 가시도(Visibility) 감소의 원인으로 작용하여 건강에 직ㆍ간접적인 피해를 주고있어 대기질 관리의 주요 대상이 되고 있다. 미세입자(PM$_{2.5}$)는 시정장애에 영향을 미치고(Chow et al., 1993; Conner et al., 1991), PM$_{10}$보다도 호흡기 계통의 사망률에 더 큰 영향을 미친다고 보고되고 있다(Reichhardt, 1995). (중략)략)

• Proceedings of the Mineralogical Society of Korea Conference
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• 1996.10a
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• pp.81-89
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• 1996

영국을 비롯한 유럽의 많은 농경지에서는 대기 중으로 아황산가스의 방출량 감소로 유황의 천연공급이 적어짐에 따라 일부 농작물의 수량 감소로 이어졌다. 반대로 자연식생하의 토양에서는 이같은 산성물질의 강하로 산성화가 진행되고 있다. 산성화의 범위와 정도를 규명하기 위하여 산성 물질의 임계부하량 연구를 추진하게 되었다. 이 결과 스코틀랜드의 많은 지역의 토양이 부하량 이상으로 산성물질이 강하되어 식물 및 생태계생존과 다양성을 위협하는 것으로 나타났다.

• Plant Journal
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• v.8 no.4
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• pp.40-44
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• 2012

The pre-treatment of natural gas to remove $H_2S$ and $CO_2$ before liquefaction in natural gas processing is required, and amine-based absorption processes are widely used in gas processing. The current study aims to model amine-based absorption process and to find cost-effective design through systematic analysis of energy systems, together with column design. Different design options for absorber and stripper are investigated in a holistic manner, and heat integration technique has been applied to investigate how design of columns is interacted with energy efficiency for the pre-treatment process considered. Case study has been presented to demonstrate the applicability of heat integration method for improving energy efficiency in practice.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2003.05b
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• pp.273-274
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• 2003

산업의 발전과 인구의 과밀, 자동차의 증가는 오염물질의 배출을 크게 증가시켰지만, 최근 관련 규제의 강화로 각 도시의 대기질은 많이 개선되어 왔다. 그러나 중국으로부터 유입되고 있는 많은 대기오염물도 국내 산성비의 8∼42% 정도나 영향을 미친다고 하며, 국내 산업체에서 배출되는 오염물질의 양도도 같은 규모의 여전히 선진국에 높아서 환경 기준치를 넘는 경우도 자주 나타내고 있다. 질산염, 황산염 등의 산성오염물질은 대기중에 에어로졸과 산성가스 형태로 존재하고 있다. 이러한 산성물질들은 건성강하라는 형태로 지표면에 자연 침강되거나, 눈이나 비 또는 안개와 같은 습성강하 형태로 지표면으로 침적되어 대기중에서 제거되기도 한다. (중략)

• Journal of the Korea Convergence Society
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• v.12 no.5
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• pp.185-190
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• 2021

An electrolyzed-acidic water treatment was investigated as a methods for removing ammonia, which is a cause of odor in life environment. The prepared electrolyzed-acidic water was found out as stable solvent capable of neutralizing weak alkaline ammonia by measuring changes in pH and ORP. It was found out that ammonia was removed from the mixture solution of electrolyzed-acidic water and ammonia water by the UV-vis absorbance analysis and electrochemical open-circuit potential measurement. The neutralized ammonia by electrolyzed-acidic water and effectively removed odor was measured using ammonia gas detecter. Consequently, we recommend the electrolyzed-acidic water can effectively and safely remove ammonia in eco-friendly.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 1998.04a
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• pp.29-30
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• 1998

• Proceedings of the Korea Air Pollution Research Association Conference
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• 1997.10a
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• pp.53-55
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• 1997

• 한국신재생에너지학회:학술대회논문집
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• 2009.11a
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• pp.533-536
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• 2009

The gasification technology is a very flexible and versatile technology to produce a wide variety products such as electricity, steam, hydrogen, Fisher-Tropsch(FT) diesels, Dimethyl Ether(DME), methanol and SNG(Synthetic Natural Gas) with near-zero pollutant emissions. Gasification converts coal and other low-grade feedstocks such as biomass, wastes, residual oil, petroleum coke, etc. to a very clean and usable syngas. Syngas is produced from gasifier including CO, $H_2$, $CO_2$, $N_2$, particulates and smaller quantities of $CH_4$, $NH_3$, $H_2S$, COS and etc. After removing pollutants, syngas can be variously used in energy and environment fields. The pilot-scale coal gasification system has been operated since 1994 at Ajou University in Suwon, Korea. The pilot-scale gasification facility consists of the coal gasifier, the hot gas filtering system, and the acid gas removal (AGR) system. The acid gas such as $H_2S$ and COS is removed in the AGR system before generating electricity by gas engine and producing chemicals like Di-methyl Ether(DME) in the catalytic reactor. The designed operation temperature and pressure of the $H_2S$ removal system are below $50^{\circ}C$ and 8 kg/$cm^2$. The iron chelate solution is used as an absorbent. $H_2S$ is removed below 0.1 ppm in the H2S removal system.