• Journal of Energy Engineering
• /
• v.11 no.2
• /
• pp.81-89
• /
• 2002

IGCC (Integrated Coal Gasification Combined Cycle) is a technology that generates electric power using coal gasification and gasified fuel. Carbon conversion value of IGCC is higher and the influence on the environment is lower than the pulverized coal power plant. Especially, in the nations where the weight of fossil fuel for power generation is remarkably high like in Korea, IGCC stands out as an alternative plan to cope with sudden limitation for the emissions. In this paper, system design study for the commercial IGCC system which the introduction is imminent to Korea was performed. Two cases of entrained gasification process are adapted, one is FHR(full heat recovery) type IGCC system for high efficiency and the other is Quench type IGCC system for low cost. System simulations using common codes like AspenPlus were performed for each system. In the case of Quench system, system option study and sensitivity analysis of the air extraction rate was performed. Thermal performance result for the FHR system is 42.6% (HHV, Net) and for the quench system is 40% (HHV, net) when 75% air is extracted.

• 한국신재생에너지학회:학술대회논문집
• /
• 2010.11a
• /
• pp.129.2-129.2
• /
• 2010

As a part of the government renewable energy policy, KOWEPO is constructing 300MW IGCC plant in Taean. IGCC plant consists of gasification block, air separation unit and power block, which performance test is separately conducted. Overall performance test for IGCC plant is peformed to comply with ASME PTC 46. Major factors affected on the overall efficiency for IGCC plant are external conditions, each block performance(gasification, ASU, power block), water/steam integration and air integration. Performance parameters of IGCC plant are cold gas efficiency, oxygen consumption, sensible heat recovery of syngas cooler for gasification block and purity of oxygen, flow amount of oxygen and nitrogen, power consumption for air separation unit and steam/water integration among the each block. The gas turbine capacity applied to the IGCC plant is 20 percent higher than NGCC gas turbine due to the low caloric heating value of syngas, therefor it is possible to utilize air integration between gas turbine and air separation unit to improve overall efficiency of the IGCC plant and there is a little impact on the ambient condition. It is very important to optimize the air integration design with consideration to the optimized integration ratio and the reliable operation. Optimized steam/water integration between power block and gasification block can improve overall efficiency of IGCC plant where the optimized heat recovery from gasification block should be considered. Finally, It is possibile to achieve the target efficiency above 42 percent(HHV, Net) for 300MW Taean IGCC plant by optimized design and integration.

• Journal of Ceramic Processing Research
• /
• v.19 no.5
• /
• pp.378-382
• /
• 2018

It is a known fact that the cement production is responsible for almost 5% of total worldwide $CO_2$ emission, the primary factor affecting global warming. Geopolymers are valuable as ordinary Portland cement (OPC) substitutes because geopolymers release 80% less $CO_2$ than OPC and have mechanical properties sufficiently similar to those of OPC. Therefore, geopolymers have proven attractive to eco-friendly construction industries. Geopolymers can be fabricated from aluminum silicate materials with alkali activators such as fly ash, blast furnace slag, and so on. Integrated gasification combined cycle (IGCC) slag has been used for fabricating geopolymers. In general, IGCC slag geopolymers are fabricated with finely ground and sieved (<128 mesh) IGCC slag. The grinding process of as-received IGCC slag is one of the main costs in geopolymer production. Therefore, the idea of using as-received IGCC slag (before grinding the IGCC slag) as aggregates in the geopolymer matrix was introduced to reduce production cost as well as to enhance compressive strength. As-received IGCC slag (0, 10, 20, 30, 40 wt%) was added in the geopolymer mixing process and the mixtures were compared. The compressive strength of geopolymers with an addition of 10 wt% as-received IGCC slag increased by 19.84% compared to that with no additional as-received IGCC slag and reached up to 41.20 MPa. The enhancement of compressive strength is caused by as-received IGCC slag acting as aggregates in the geopolymer matrix like aggregates in concrete. The density of geopolymers slightly increased to $2.1-2.2g/cm^3$ with increasing slag addition. Therefore, it is concluded that a small addition of as-received IGCC slag into the geopolymer can increase compressive strength and decrease the total cost of the product. Moreover, the direct use of as-received IGCC slag may contribute to environment protection by reducing process time and $CO_2$ emission.

• Proceedings of the Korea Society for Energy Engineering kosee Conference
• /
• 1999.05a
• /
• pp.45-48
• /
• 1999

석탄가스화복합발전(Integrated Gasification Combined Cycle)기술은 우수한 환경성능과 열성능을 지니고 있어 장래 미분탄화력을 대신할 수 있는 대체기술로서 각광을 받고 있다. IGCC는 석탄가스화, 정제, 복합발전계통 및 공기분리계통 등 그 구성요소가 복잡하여 이들간의 시스템 최적화 정도에 따라 경제성 및 플랜트 성능이 크게 좌우된다. 최근에 가스터빈과 공기분리설비(Air Separation Unit)를 연계시켜 IGCC플랜트 성능을 향상시키는 연구가 다수 진행되었다[1],[2],[3]. 본 연구에서는 가스터빈과 ASU 간의 연계시 공기추출량을 결정하는 인자들을 검토하고 Texaco quench 가스화공정을 채용한 IGCC 플랜트에 대해 GatecCyle code등 상용코드를 이용하여 모델링하고 가스터빈 압축기 공기추출량에 따른 IGCC 플랜트 성능을 분석하였다. 본 연구 결과를 통하여 대상 IGCC 플랜트의 적정 공기추출량을 결정하고 플랜트 성능을 계산하였다. 본 연구 결과는 전력연구원에서 수행중인 300MW급 IGCC 예비기본설계에 활용될 것이다.(중략)

• 한국신재생에너지학회:학술대회논문집
• /
• 2008.10a
• /
• pp.242-245
• /
• 2008

In the power generation industry, various efforts are needed to cope with tightening regulation on carbon dioxide emission. Integrated gasification combined cycle (IGCC) is a relatively environment friendly power generation method using coal. Moreover, pre-combustion $CO_2$ removal is possible in the IGCC system. Therefore, much effort is being made to develop advanced IGCC systems. However, removal of $CO_2$ may affect the system performance and operation through reduction of fuel gas supplied to the gas turbine. This study predicts system performance change due to $CO_2$ capture by pre-combustion process from the normal IGCC performance without $CO_2$ capture and presents results of design parametric analysis.

• Proceedings of the Korea Society for Energy Engineering kosee Conference
• /
• 1997.10a
• /
• pp.9-16
• /
• 1997

원유 정제의 가장 heavy한 잔류물인 중잔유(heavy residual oil)의 IGCC 프랜트의 적용성능을 평가하기 위한 방안으로, 정적시스템 모사방법을 사용하여 중잔유를 발전 연료로 사용한 IGCC 플랜트를 모사하였다. 모사에 적용한 중잔유는 Visbreaker Residue와Butane Asphalt이며, 시스템 모사방법의 검증을 위해서, 중잔유의 가스화 반응 모사결과를 Shell사에서 발표한 실증자료와 비교하여 사용된 모사방법이 적절함을 입증한 후 이 결과를 이용하여 IGCC 플랜트에 대한 모사에 적용하였다.

• Proceedings of the Korea Society for Energy Engineering kosee Conference
• /
• 1996.04a
• /
• pp.65-70
• /
• 1996

본 연구는 상용공정해석용 프로그램으로서 고체 반응물을 포함하고 있는 공정을 해석할 수 있는 ASPEN(Advanced System for Process Engineering) 코드를 이용하여 IGCC BSU 실험플랜트를 모사하고 실제 실험 결과와 비교하였으며, IGCC BSU 시스템을 수정보완하여 가스정화공정을 도입하고 석탄가스화기에서 생성된 생성가스에 대해 발전 연료로서의 타당성 및 적합성 여부를 살펴보고 이 자료를 토대로 향후 IGCC 플랜트의 scale-up 및 실용플랜트에 대한 이해를 도모코자 한다. 또한 환경적인 측면에서 IGCC BSU에서 방출되는 슬랙, 비산재 및 flare stack을 통한 SOx 및 NOx 등의 방출량을 살펴보았다.

• Resources Recycling
• /
• v.27 no.2
• /
• pp.38-47
• /
• 2018

Integrated gasification combined cycle (IGCC) is a next generation energy production technology that converts coal into syngas with enhanced power generation efficiency and environmental performance. IGCC produces almost coal gasification slag as the solid by-product. IGCC slag is generated about 140,000 tons for a year although recycling of it is still in the early stages. We evaluated the potential of IGCC slag which is generated from a pilot plant in South Korea as an alkali-activated cement. Samples which were activated with the combined activator of sodium silicate solution and caustic soda had an average compressive strength of 4.5 MPa, showing expansion. Expansion of the alkali-activated slag was presumed to be caused by free CaO in the slag, although it was not detected by the ethylene glycol method. Samples that were activated with the combined activator of sodium aluminate and caustic soda had an average compressive strength of 10 MPa. Hydroxy sodalite and $C_3AH_6$ were found to be the new crystalline phases. IGCC slag can be used as an alkali-activated material, but the strength performance should be improved with proper mix design approach to calculate optimum proportions which can alleviate the expansion issue at the same time.

• Transactions of the Korean hydrogen and new energy society
• /
• v.22 no.1
• /
• pp.118-127
• /
• 2011

An IGCC was evaluated as one of the next generation technologies that would be able to substitute for coal-fired power plants. According to "The 4th Basic Plan of Long-term Electricity Supply & Demand" which is developed by the Electricity Business Acts, the first IGCC will be operated at 2015. Like other new and renewable energy such as solar PV, Fuel cell, The IGCC is considered as non-competitive generation technology because it is not maturity technology. Before the commercial operation of an IGCC in our electricity market, its economic feasibility under the Korean electricity market, which is cost-based trading system, is studied to find out institutional support system. The results of feasibility summarized that under the current electricity trading system, if the IGCC is considered like a conventional plant such as nuclear or coal-fired power plants, it will not be expected that its investment will be recouped within life-time. The reason is that the availability of an IGCC will plummet since 2016 when several nuclear and coal-fired power plants will be constructed additionally. To ensure the reasonable return on investment (NPV>0 IRR>Discount rate), the availability of IGCC should be higher than 77%. To do so, the current electricity trading system is amended that the IGCC generator must be considered as renewable generators to set up Price Setting Schedule and it should be considered as pick load generators, not Genco's coal fired-generators, in the Settlement Payment.

• Proceedings of the Korea Society for Energy Engineering kosee Conference
• /
• 1998.05a
• /
• pp.9-14
• /
• 1998

석탄가스화 복합발전시스템(Integrated Gasification Combined Cycle, IGCC)은 기존의 미분탄 연소 발전 방식에 비해 발전효율이 5-10%이상 높고, 공해물질 배출 특성에 있어서도 SOx와 NOx를 각각 95% 및 75% 이상 감소시키고 재는 용응 슬러 형태로 처리하는 발전시스템이다. 이와 같은 고효율 및 환경 친화적인 특성으로 인하여 IGCC 시스템은 차세대 석탄화력 발전 방식으로서 각광받고 있으며, 이미 선진 공업국들은 70년대 석유파동 이후 IGCC 기술의 개발을 활발히 진행하여, 최근에는 250MW 이상 출력의 상용화급 플랜트를 가동 또는 건설 중에 있으며, 머지않아 상업화에 도달할 전망이다. 또한 국내에서도 최근 전력 수요의 급증과 전 세계적으로 확산되고 있는 환경 규제의 강화 등으로 우리의 실정에 맞는 IGCC 공정의 개발이 활발히 진행되고 있다. (중략)