• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2010년도 추계학술대회 초록집
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• pp.131.1-131.1
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• 2010

This study was conducted for engineering optimization for the gasification process which is the key factor for success of Taean IGCC gasification plant which has been driven forward under the government support in order to expand to supply new and renewable energy and diminish the burden of the responsibility for the reduction of the green house gas emission. The gasification process consists of coal milling and drying, pressurization and feeding, gasification, quenching and HP syngas cooling, slag removal system, dry flyash removal system, wet scrubbing system, and primary water treatment system. The configuration optimization is essential for the high efficiency and the cost saving. For this purpose, it was designed to have syngas cooler to recover the sensible heat as much as possible from the hot syngas produced from the gasifier which is the dry-feeding and entrained bed slagging type and also applied with the oxygen combustion and the first stage cylindrical upward gas flow. The pressure condition inside of the gasifier is around 40~45Mpg and the temperature condition is up to $1500{\sim}1700^{\circ}C$. It was designed for about 70% out of fly ash to be drained out throughout the quenching water in the bottom part of the gasifier as a type of molten slag flowing down on the membrane wall and finally become a byproduct over the slag removal system. The flyash removal system to capture solid particulates is applied with HPHT ceramic candle filter to stand up against the high pressure and temperature. When it comes to the residual tiny particles after the flyash removal system, wet scurbbing system is applied to finally clean up the solids. The washed-up syngas through the wet scrubber will keep around $130{\sim}135^{\circ}C$, 40~42Mpg and 250 ppmv of hydrochloric acid(HCl) and hydrofluoric acid(HF) at maximum and it is turned over to the gas treatment system for removing toxic gases out of the syngas to comply with the conditions requested from the gas turbine. The result of this study will be utilized to the detailed engineering, procurement and manufacturing of equipments, and construction for the Taean IGCC plant and furthermore it is the baseline technology applicable for the poly-generation such as coal gasification(SNG) and liquefaction(CTL) to reinforce national energy security and create new business models.

• 대한기계학회논문집B
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• 제20권5호
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• pp.1735-1742
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• 1996

An entrained flow gasifier simulating the cold mode was tested to estimate its performance for coal gasification and flow characteristics with a developed high speed impinging jet nozzle. The burner was designed for high temperature and high pressure(HTHP) conditions, especially for IGCC(Integrated Coal Gasification Combined Cycle). In order to get proper size of droplets for high viscous liquid such as coal slurry, atomization was achieved by impacting slurry with high speed (over 150m/sec) secondary gas (oxygen/or air)/ Formed water droplets were ranged between 100.mu.m to 20.mu.m in their sizes. The flow characteristics in the gasifier was well understood in mixing between fuel and oxidizer. Both external and internal recirculation zones were closely investigated through experimentation with visualization and numerical solutions from FLUENT CODE.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2010년도 추계학술대회 초록집
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• pp.137.2-137.2
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• 2010

With current real economic growth of more than 10% per year, the Chinese energy consumption is rapidly increasing. Coal supply consists of the vast majority of China's total energy consumption requirements in 2008. China, the largest energy consumer, is expected to be heavily dependent on coal for future power generation, too (IEA,2009). A growing concern on global warming, on the other hand, drives Chinese government to declare her commitment to the reduction of CO2 emission by 2020. In this paper, China's energy market is examined for the current and future primary energy mix. Coal is found to be the biggest part accounting for 68.7% of total primary energy consumption while coal-fired power accounts for over 80% of the total power generation. The importance of Clean Coal Technology is being discussed based on the findings of the importance of coal in China's economy and its sustainable development. Among the technologies involved, a brief investigation of IGCC(Integrated Gasification Combined Cycle) technology with a review on current IGCC projects in China are provided from the perspective of environmental benefits. Studies on regional Chinese power market is also conducted. It is found that the regulated power tariff in electricity system makes the power suppliers suffer from financial loss and changes in the electricity price system is under serious consideration by Chinese government. Even though Chinese power market system causes difficulties of commercialization for IGCC technology, the potential benefits will be high due to China's huge requirements of power generating capacity and its heavy reliance on coal if the electricity price system can be changed smoothly.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2011년도 제37회 추계학술대회논문집
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• pp.685-693
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• 2011

에너지기후시대에 신에너지원 발굴, 저탄소 녹색성장의 일환으로 석탄 IGCC기술이 개발 중에 있다. 본 연구는 IGCC기술 중 가스화기에서 생산된 합성가스를 가스터빈에 직접 주입시 생길 수 있는 문제점을 미리 파악하고, 그 연소특성자료를 축적하기 위해 수행되었다. GE7EA연소기를 대상으로한 상압 및 고압연소실험을 통해 합성가스의 기본적인 연소특성을 파악하였으며, 수소화염이 과다한 NOx발생의 원인임을 파악하고, 질소희석을 통해 NOx배출량을 제어할 수 있음을 확인하였으며, 연소진동은 크게 발생치 않음을 확인하였다. 본 연구를 통해 축적된 시험 데이터는 2015년에 국내 최초로 준공예정인 태안 IGCC플랜트에 연소진단시스템 및 최적화 기술적용시 활용된 예정이다.

• 한국기후변화학회지
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• 제3권4호
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• pp.271-280
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• 2012

본 연구는 지구온난화와 에너지 위기의 시대에 청정 석탄 이용기술로 부각되고 있는 석탄가스화 복합발전의 경제성을 분석한 것으로 실물옵션을 활용하여 한국형 300 MW급 IGCC 실증플랜트 기술개발사업의 가치를 평가하였다. 실물옵션 가치평가법 중의 하나인 이항옵션 모형을 활용하였고, 연료비 불확실성을 고려하여 평가하였다. 분석 결과, 현금흐름할인법을 이용하여 경제성 평가를 했을 때보다 더 높은 투자가치가 있음을 확인할 수 있었으며, 사업의 가치가 양의 값을 나타내 현재 추진 중인 이 사업이 경제적으로 타당하다고 판단할 수 있었다. 또한, 경제적 타당성 입증을 통해 후속호기 발전에 긍정적 영향을 주며, CCS와 연계 시에는 더 큰 효과가 있을 것으로 기대된다.

• 에너지공학
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• 제17권2호
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• pp.54-66
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• 2008

2005년 2월 16일 발효된 교토의정서 체제에서 부속서 I 에 포함된 선진국들은 온실가스에 대하여 2008년부터 2012년까지 연간 1990년 대비 년 평균 5.2%를 감축하도록 목표량을 규정하였다. 이러한 목표량을 달성하기 위하여 EU등의 국가는 배출권 거래제도 및 청정개발체제(CDM)사업 등 온실가스를 저감하기 위하여 힘쓰고 있다. 교토-의정서 1차 공약기간 중에서 온실가스 감축목표를 부여받지 않은 OECD국가는 우리나라와 멕시코 두 나라 뿐이며, 이산화탄소 배출량 9위인 우리나라에 2차 공약기간(2013년$\sim$2017년)부터 의무저감에 대한 국제적 압력이 가중되고 있다. 본 연구에서는 탄소세를 변화시키면서 발전소 건설의 변화와 그에 따른 $CO_2$ 저감량을 계산하고, 시나리오 별 석탄가스화복합발전(Integrated Gasification Combined Cycle; IGCC)과 $CO_2$ 저감장치 설치 발전소의 진입경쟁에 대하여 분석하였다. 시뮬레이션 결과 탄소세가 증가하더라도 원자력발전소의 건설이 무조건 증가하는 것이 아니라 일정한 비율만을 차지하고, 석탄화력발전소의 감소비중을 LNG 복합화력이 차지하는 것을 알 수 있었으며, IGCC와 같은 대안 기술이 존재한다면 석탄화력의 감소비중의 일부를 차지한다.

• 한국환경보건학회지
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• 제36권2호
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• pp.136-140
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• 2010

The integrated gasification combined cycle (IGCC) is one of the most promising proposed processes for advanced electric power generation that is likely to replace conventional coal combustion. This emerging technology will not only improve considerably the thermal efficiency but also reduce or eliminate the environmentally adverse effects normally associated with coal combustion. The IGCC process gasifies coal under reducing conditions with essentially all the sulfur existing in the form of hydrogen sulfide ($H_2S$) in the product fuel gas. The need to remove $H_2S$ from coal derived fuel gases is a significant concern which stems from stringent government regulations and also, from a technical point of view and a need to protect turbines from corrosion. The waste seashells were used for the removal of hydrogen sulfide from a hot gas stream. The sulphidation of waste seashells with $H_2S$ was studied in a thermogravimetric analyzer at temperature between $600^{\circ}C$ and $800^{\circ}C$. The desulfurization performance of the waste seashell sorbents was experimentally tested in a fixed bed reactor system. Sulfidation experiments performed under reaction conditions similar to those at the exit of a coal gasifier showed that preparation procedure and technique, the type and the amount of seashell, and the size of the seashell affects the $H_2S$ removal capacity of the sorbents. The pore structure of fresh and sulfided seashell sorbents was analyzed using mercury porosimetry, nitrogen adsorption, and scanning electronmicroscopy.

• 에너지공학
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• 제11권3호
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• pp.187-193
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• 2002

가스화복합발전기술은 석탄 또는 중질유 등의 기존 발전연료 뿐만 아니라 잔사유 또는 나무와 같은 다양한 연료를 가스터빈에 사용할 수 있어 차세대 발전방식으로 부각되고 있다. 본 논문은 이러한 가스화 복합발전에서 가스화 하여 나온 저열량의 합성가스를 천연가스연료로 설계된 가스터빈에 사용할 때 가스터빈의 성능을 예측하였다. 이를 위해 제한된 설계 데이터로부터 가스터빈의 거동을 예측하는 시스템 적인 방법을 사용하여 발전용 GE 7FA가스터빈에 설계연료인 천연가스와 4가지의 다른 종류의 합성가스를 사용할 때 가스터빈의 설계조건과 탈 설계조건 성능을 예측하였다.

• 한국에너지공학회:학술대회논문집
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• 한국에너지공학회 2000년도 추계 학술발표회 논문집
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• pp.73-77
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• 2000

A great deal of research has been carried out in the last twenty some years to develop high temperature desulfurization. For example, the efficiency of advanced power generation processes based on the integrated gasification combined cycle (IGCC) can be increased significantly with high temperature desulfurization. Much of the recent high temperature desulfurization research has concentrated on zinc-based sorbents such as zinc ferrite(ZnFe$_2$O$_4$) and zinc titanate(ZnO.xTiO$_2$) due to its thermodynamic advantage in capturing H$_2$S molecules.(omitted)

• 한국환경보건학회지
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• 제30권5호
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• pp.395-401
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• 2004

In this study, lots of methods have been studing to utilize energy and decrease contaminated effluents. There has been great progress on IGCC (Integrated gasification combined cycle) to reduce thermal energy losses. The following results have been conducted from desulfurization experiments using waste shell to remove $H_{2}S$. Unreacted core model ior desulfuriration rate prediction of sorbent was indicated. These were linear relationship between time and conversion. So co-current diffusion resistance was conducted reaction rate controlling step. The sulfidation rate is likely to be controlled primarily by countercurrent diffusion through the product layer of calcium sulfide(CaS) formed. Maximum desulfurization capacity was observed at 0.631 mm for lime, oyster and hard-shelled mussel. The kinetics of the sorption of $H_{2}S$ by CaO is sensitive to the reaction temperature and particle size at $800^{\circ}C$, and the reaction rate of oyster was faster than the calcined limestone at $700^{\circ}C$.