• Plant Journal
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• v.9 no.3
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• pp.10-24
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• 2013

• Journal of Energy Engineering
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• v.8 no.4
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• pp.553-559
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• 1999

This study has been implemented to investigate various characteristics of coals which are imported from abroad. KIER has developed 1 T/D bench-scale unit, entrained-flow coal-slurry gasification technology to investigate the followings: 1) to assess the appropriate foreign coals for gasification. 2) to establish the data base for gasification phenomena, 3) to minimize the technical risks prior to introduction of commercial scaled IGCC power plant, 4) to develop essential key technologies and to establish operational experiences for coal gasification. The foreign coals used in the gasification are Cyprus and Alaska coals from U. S. A. Cyprus coal(bituminous) and Alaska coal (lignite) were shown about 1.29$0^{\circ}C$. The concentrations of coal-slurry for Cyprus were maintained up to 58%, 62% and 65% in order to enable to feed satisfactorily it into the gasifier without any other problems at feeding systems. However, the Alaska coal was unable to maintain slurry concentration over the 60% due to its high viscosity. During the experiments, $O_2/coal$ ratios in both coals ere maintained from 0.6~1.2, but especially Alaska coal was required excessive oxygen feed due to its high ingerent moisture contents. During the experiments with two different coals, the concentrations of syngas $(H_2+CO)$ were shown as 40~62%, and the heating value of syngas were detected as 1,400~2,050 kcal/N㎥

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 1999.05a
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• pp.39-44
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• 1999

발전용 연료로 사용하는 석탄은 취급의 어려움과 가스 및 석유에 비해 품질이 낮은 단점이 있으나, 매장량이 풍부하고 가격이 저렴하여 발전용 연료로의 사용은 더욱 증대될 전망이다. 이에 따라 석탄의 안정적 수급 측면에서 구입원의 다양화가 예상되고 있으나, 현재 발전용 연료의 연소특성 평가는 주로 실험실적 기초 시험에 의존함에 따라 정확한 평가가 곤란한 실정이므로 시험연소로를 이용하여 각종 연소특성을 비교 평가하여 탄종별 최적 연소조건 규명과 적정 흔탄비에 대한 Data Base를 구축하고자 한다.(중략)

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 1996.10b
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• pp.113-122
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• 1996

본 연구는 석탄가스화복합발전(IGCC)의 핵심부분이라 할 수 있는 슬래깅 형태의 분류층 가스화기에 원활한 Slagging을 유지하기 위해 Flux addition method와 Coal blending method를 적용하였다. 대상탄으로는 가스화에 적합하다고 알려진 알라스카탄, 대동탄과 비교탄으로 가스화에 부적합하다고 알려진 1종류의 유연탄을 대상으로 기본분석 및 화학적 조성분석, 용융온도를 측정하여 봄으로써 대상탄들의 슬래깅성향을 평가하였다. 대동탄과 알라스카탄에 대해서는 Flux addition method를 적용하고, 비교탄에 대해서는 Coal blending Method를 적용한 후, 140$0^{\circ}C$로 운전되는 가스화기의 효율을 최대화할 수 있는 Flux 첨가비와 blending ratio를 산정하였다.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2011.11a
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• pp.685-693
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• 2011

In the era of energy climate, IGCC technology is one of the powerful solutions for the demands of new energy with low carbon green growth. The present study is conducted to investigate the combustion characteristics of syngas from the coal gasifier to predict problems when it is fed to the gas turbine. Through high and low combustion tests, we understood that hydrogen is the main reason of NOx emission but easily controled by injecting the dilution of nitrogen. CO emission of syngas was comparable with that of methane and pressure fluctuation of syngas was not significant. The data from this study will be used for the optimization of combustion in the Korea first IGCC plant in 2015.

• Journal of the Korea Institute of Building Construction
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• v.21 no.6
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• pp.551-562
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• 2021

In this study, to suggest an efficient method of using coal gasification slag(CGS), a byproduct from integrated gasification combined cycle(IGCC), as a combined fine aggregate for concrete mixture, the diverse performances of concrete mixtures with combined fine aggregates of CGS, river sand, and crushed sand were evaluated. Additionally, using CGS, the reduction of the hydration heat and the strength developing performance were analyzed to provide a method for reducing the heat of hydration of mass concrete by using combined fine aggregate with CGS and replacing fly ash with cement. The results of the study can be summarized as follows: as a method of recycling CGS from IGCC as concrete fine aggregate, a combination of CGS with crushed sand offers advantages for the concrete mixture. Additionally, when the CGS combined aggregate is used with low-heat-mix designed concrete with fly ash, it has the synergistic effect of reducing the hydration heat of mass concrete compared to the low-heat-designed concrete mixture currently in wide use.

• Journal of the Korea Institute of Building Construction
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• v.24 no.2
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• pp.169-180
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• 2024

In this study, to suggest an efficient method of using coal gasification slag(CGS), a byproduct from integrated gasification combined cycle(IGCC), as a combined fine aggregate for concrete mixture, the diverse performances of concrete mixtures with combined fine aggregates of CGS, river sand, and crushed sand were evaluated. Additionally, using CGS, the reduction of the hydration heat and the strength developing performance were analyzed to provide a method for reducing the heat of hydration of mass concrete by using combined fine aggregate with CGS and replacing fly ash with cement. The results of the study can be summarized as follows: as a method of recycling CGS from IGCC as concrete fine aggregate, a combination of CGS with crushed sand offers advantages for the concrete mixture. Additionally, when the CGS combined aggregate is used with low-heat-mix designed concrete with fly ash, it has the synergistic effect of reducing the hydration heat of mass concrete compared to the low-heat-designed concrete mixture currently in wide use.

• 한국신재생에너지학회:학술대회논문집
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• 2007.06a
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• pp.800-803
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• 2007

Gasification has been regarded as a core technology in dealing with environmental pollutants and in obtaining higher efficiency for power generation. Among several ways in utilizing produced syngas from gasification, power generation would be the most prominent application. Syngas from coal was applied to the readily available LPG engine from automobiles. Main purpose was to identify the combustion characteristics in the modified gas engine when using syngas of low heating value and to test the modification optionsin the LPG gas engine. Gas engine rpm and the corresponding flue gas composition were measured for each syngas input condition. Results showed that even with syngas at the heating value of $1300{\sim}1800$ kcal/$Nm^3$ corresponding to the $6{\sim}7%$ of LPG heating value, gas engine operated successfully only with the problems of high CO and oxygen concentrations in the flue gas.

• Journal of Energy Engineering
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• v.10 no.2
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• pp.132-139
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• 2001

석탄가스화 복합발전의 집진 공정에 사용하기 위한 금속제 safety filter의 재질 선정을 위하여 황화수소 가스 분위기에서 합금강의 부식 특성을 규명하였다. 사용 합금강은 SUS 310, SUS 316, Inconel 600과 Hastelloy X이다. 전기로 내에 설치된 지름 50mm의 qualtz 튜브 반응기에서 부식실험이 행하여졌다. 40$0^{\circ}C$부터 $700^{\circ}C$까지의 등은 조건에서 실험이 행하여졌고, 분위기 가스의 영향을 보기 위하여 H$_2$S 가스를 함유한 $N_2$(dry), $N_2$(saturation), $CO_2$(dry), 그리고 석탄가스 분위기에서 실험하였다. 부식 생성물을 파악하기 위하여 X-ray 회절기와 주사전자현미경 분석이 함께 이루어졌다. 1.7% H$_2$S, $600^{\circ}C$ 이하 온도 조건에서는 니켈계 내식강 중 Hastelloy X와 철계 내식강 중 SUS 310 등 고크롬 합금강이 IGCC 용 필터 소재 금속으로서 높은 내부식성을 나타내었다. 0.3%~4.99% 황화수소 농도 범위에서 황화수소 농도 변화에 따라서 SUS 310의 경우 3~237mg/d$m^2$.day, Inconel 600의 경우 4~660mg/d$m^2$.day로 부식속도는 크게 증가되었다. 50$0^{\circ}C$, 석탄가스 분위기에서 부식속도는 SUS 310은 45mg/d$m^2$.day, SUS 316은 110mg/d$m^2$.day, Inconel 600은 576mg/d$m^2$.day, 그리고 Hastelloy X 는 140mg/d$m^2$.day로서 합금강 시편 중 SUS 310 합금강이 가장 우수한 내식성을 나타내었다. 부식 표면에는 황화니켈, 황화철 피막이 형성되었다.

• 한국신재생에너지학회:학술대회논문집
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• 2008.10a
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• pp.234-237
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• 2008

분류층 가스화기에서 가스화기 운전 온도는 슬래그의 원활한 배출과 가스화기 성능 등에 영향을 미친다. 가스화기 운전온도는 또한, 석탄 및 산소 소비량에도 영향을 미쳐 궁극적으로는 가스화 플랜트의 주요 설비 용량을 결정하는 주요 요인중의 하나이다. 가스화기 운전 온도가 일정수준 이상으로 증가할 경우 냉가스 효율이 저하되고 가스화 성능에 약 영향을 미친다. 본 논문에서는 Coal 및 Flux 공급장치, 슬래그 배출장치 당의 구성을 설명하고 Flux 투입량에 따른 슬래그 Tcv, 가스화기 성능 등을 예측하였다. 또한, 300MW IGCC 실증 가스화플랜트 엔지니어링을 위한 예비단계로 석회석 투입에 따른 Flux 공급장치를 포함한 Feeding 설비 용량, 슬래그처리설비 용량, 가스화기 내부 및 출구 적정온도를 예측하였다.