• Transactions of the Korean hydrogen and new energy society
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• v.24 no.3
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• pp.249-254
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• 2013

The integrated gasification combined cycle (IGCC) system is well known for its high efficiency compared with other coal fueled power generation system. The aim of this study is to confirm the feasibility of using bio gas in coal feeding system and syngas recirculation system. The effects of using bio gas in the gasifier on the syngas composition were investigated through simulations using the Aspen Plus process simulator. It was found that these changes had an influence on the syngas composition of the final stream and bio gas can be used in a gasifier system.

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 2000.11a
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• pp.19-24
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• 2000

수소 연료는 공해물질을 전혀 배출하지 않고 수송용 및 연료전지 등에 널리 사용되므로 21세기의 궁극에너지로 인식되고 있다. 수소가 미래의 궁극적인 대체에너지원 또는 에너지 매체로 꼽히고 있는 것은 현재의 화석연료나 원자력 등이 따를 수 없는 장점을 갖고 있기 때문이다. 또한 수소는 연소시 극소량의 질소가 생성되는 것을 제외하고는 공해물질이 배출되지 않으며, 직접 연소를 위한 연료 또는 연료전지 등의 연료로 사용이 간편하다. 그러나, 기존의 수소제조 기술은 화석연료 중의 탄소 성분을 물과 반응시켜 수소로 만들기 때문에 상당량의 에너지가 필요하고 이 반응은 흡열반응이기 때문에 탄소 성분을 가스화 시키기 위해서는 1300K 이상의 고온과 상당한 반응기 용량이 요구된다.(중략)

• 한국신재생에너지학회:학술대회논문집
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• 2007.06a
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• pp.784-787
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• 2007

A process flowsheet simulation model based on ASPEN PLUS was developed to investigate the effect of co-gasification of coal and rice husk on the gasifier performance and pollutant emissions in IGCC power plant. The analyses were done for an 02-blown, pulverized gasifier using coal and rice husk as feedstock, parameter employed the blending ratio of rice husk in coal were investigated. From the simulation results, it was found that gaseous pollutant emissions were reduced substantially with the increase of the blending ratio of rice husk. An optimum range between 15% and 25% rice husk-to-coal ratio was found to be the optimum point in terms of gaseous pollutant emission per energy output for sui fur and nitrogen compounds.

• 한국신재생에너지학회:학술대회논문집
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• 2007.06a
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• pp.788-791
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• 2007

기존의 미분탄 화력발전을 대체할 수 있는 차기 주자인 가스화복합발전(Integrated Gasification Combined Cycle) 기술은 단순히 열과 전기를 얻는데 그치지 않고 $CO_2$ 저감뿐만 아니라 다양한 형태의 2차 에너지원과 화학원료를 생산할 수 있는 기술이다. 상용화 운전 중인 기존의 IGCC 플랜트는 석탄 공급에 있어 건조된 미분탄(dry pulverized coal) 형태로 공급하는 건식 형태와 석탄슬러리(Coal water slurry)의 액상으로 공급하는 습식 형태로 대별되고 있다. 본 연구에서는 ASPEN plus를 이용하여 상용화 IGCC 플랜트에 대한 기본 모델을 구축하였으며, 산지별로 대상 탄종을 illinois #6(미국), Shenhua(중국), Drayton(호주)로 선정하여 가스화공정에 대한 성능을 해석하였다. 동일한 발전 출력을 얻고자 하였을 때, 석탄의 공급방식에 따라 필요한 석탄과 유틸리티 공급량과 가스화기 전${\cdot}$후단에서의 운전특성과 생성되는 합성가스(syngas) 조성, 냉가스(cold gas) 효율 및 탄소 전환율을 통해 각 case에 대한 플랜트 특성을 비교하였다.

• 제어로봇시스템학회:학술대회논문집
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• 1993.10a
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• pp.601-606
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• 1993

From the power plants in a steel plant, environment pollutants such as SOx, NOx, CO are emitted by the combustion reaction between the fuels those are by-product gases and oil. To reduce the amounts of the pollutants, it must be important that build the predictive models for the emission of the pollutants. In this paper, the model that predict the amount of future fuel consumption and the model that predict the amount of generated pollutants for the used fuel amounts is developed by using Gibb's free energy minimization method with the temperature correction techniques and neural network back propagation method. For some data set, the calculation results from this models are compared with the real emission amounts of SOx, NOx and result of the calculation by the ASPEN plus which is a commercial software. The result from this model is better than the result by ASPEN plus for this problem.

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 1993.05a
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• pp.96-100
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• 1993

상용 모사기인 ASPEN PLUS를 이용하여 메탄올을 원료로 한 고체 고분자 전해질 연료전지 발전 시스템의 정상상태 전산 모사를 실시하여 최적의 설계를 시도하였다. 연료전지 본체의 모사를 위하여 USER block과 FORTRAN block을 작성하였으며, 다른 공정은 ASPEN PLUS에서 제공되는 모델을 사용하였다. 모사 결과, 실제 경우와 근사한 값을 얻었으며, 이를 근거로 하여 조업조건에 따른 출력의 변화를 살펴봄으로써 효율을 최대로 하는 각 단위공정의 최적 조업조건을 찾아내었다. 이로부터 향후 실용화될 국내의 고체 고분자 전해질 연료전지 발전 시스템에 대한 기본 자료를 제시할 수 있으며, 개발되는 공정은 고온으로 조작되는 개질기의 열을 효율적으로 회수하여 이용함으로써 공정의 에너지 효율을 높이도록 하여야 한다.

• Journal of Energy Engineering
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• v.28 no.4
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• pp.13-18
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• 2019

The high energy penalty in amine-based post-combustion CO₂ capture process is hampering its industrial scale application. An advanced process is designed by intensive heat integration within the conventional process to reduce the stripper duty. The study presents the technical feasibility for stripper duty reduction by intensive heat integration in CO₂ capture process. A rigorous rate-based model has been used in Aspen Plus® to simulate conventional and advanced process for a 300 MW coal-based power plant. Several design and operational parameters like split ratio, stripper inter-heater location and flowrate were studied to find the optimum values. The results show that advanced configuration with heat integration can reduces the stripper heat by 14%.

• Transactions of the Korean hydrogen and new energy society
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• v.19 no.5
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• pp.460-466
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• 2008

In this study, a computer modeling work has been performed for the power generation system using polymer electrolyte fuel cell with Aspen Plus general purpose chemical process simulator. Stoichiometric reactor module was used for the modeling of reformer for the production of hydrogen. For the modeling of the electrochemical reaction, Gibbs reactor module built-in Aspen Plus was utilized. SRK equation of state model was selected for the proper simulation of the overall fuel cell system.

• Proceedings of the KIEE Conference
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• 1998.07a
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• pp.55-57
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• 1998

Molten carbonate fuel cell (MCFC) power plant is expected to be one of the most promising future power generation system for the electric utilities because of its high efficiency, environmental suitability and capability of using coal as fuel. To get such attractive performance, it is necessary to consider optimizing operation and gas recycling system. This paper describes the simulation results of 7 kW MCFC stack in KEPRI and the effects of the three possible gas recycling operations, i.e. cathode gas recycling, anode gas recycling, anode gas recycling with catalytic burner.

• Korean Chemical Engineering Research
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• v.44 no.2
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• pp.129-135
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• 2006

In this study, computer modeling and simulation works were performed to obtain nearly pure toluene product from toluene containing non-aromatic compounds using sulfolane as a solvent through an extractive distillation process. NRTL liquid activity coefficient model was adopted for phase equilibrium calculations and Aspen Plus release 12.1, a commercial process simulator, was used to simulate the extractive distillation process. In this study, it was concluded that the toluene product with a purity of 99.8 percent by weight and a recovery of 99.65 percent was obtained through an extractive distillation process.