CO2 Emission Abatement in IGCC Power Plants by Semiclosed Cycles: Part A — With Oxygen-Blown Combustion

Chiesa, Paolo; Lozza, Giovanni

doi:10.1115/98-gt-384

Cited by 14 publications

(6 citation statements)

References 5 publications

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“…ψ= volume flow of recirculated CO volume flow of the compressor inlet flow 2 (5) Prediction of compressor performance at identical Π N Th e Π N here is set to a level at which the compressor operates with air as a working fl uid. Th e normalized pressure ratio and isentropic effi ciency predicted using the throughfl ow analysis are illustrated in Fig.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…Some extra devices, such as air separation and CO 2 liquefaction units, have been proposed to be added to the traditional power plant. 5 Modifi cations are also required to adapt gas turbines to the new working fl uid and oxy-fuel combustion. 6 Th us, continuous eff orts have been made to predict the working characteristics of various components in the cycle and to handle such a new power plant.…”

Section: Introductionmentioning

confidence: 99%

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Aerodynamic analysis of a highly loaded compressor in semi‐closed cycles using a throughflow method

Song

2015

Greenhouse Gases

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This paper outlines the aerodynamic performance of a highly loaded 5‐stage compressor in a conceptual semi‐closed cycle. An in‐house throughflow computation procedure that has been proven to be a powerful tool in aerodynamic analysis for modern compressors is applied to simulate the compressor. The influences of changes in physical properties of the working medium with varying ratios of exhaust CO2 recirculation are considered in the computation. A series of numerical simulations is conducted with two settings depending on whether the rotational speed is set to obey the criterion of similarity. For the identical non‐dimensional speed parameter, the compressor can operate stably with pure CO2 as the working fluid. The distributions of aerodynamic parameters undergo no big differences under various CO2 contents; however, a somewhat little higher loss is observed for the 5th stage. When the absolute rotational speed is set according to the originally designed value, the compressor can bear a 25% CO2 content at the cost of a substantially narrowed working range, and a recirculation ratio of approximately 10% is a safe threshold value. The aerodynamic configuration also undergoes a notable redistribution given these circumstances; the load of the front stages is reduced, but the rear stages become the risk factors at near stall condition. This research reveals that from the compressor design point of view, a semi‐closed cycle is feasible using existing technology and that compressor modifications are needed according to situational requirements. © 2015 Society of Chemical Industry and John Wiley & Sons, Ltd

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Section: Simulation Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Aerodynamic analysis of a highly loaded compressor in semi‐closed cycles using a throughflow method

Song

2015

Greenhouse Gases

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“…However, the more common proposal is being applied through gasification of coal to produce syngas which should be purified before using it the power cycle. In their research, Chiesa and Consonni [145] and Chiesa and Lozza [146,147] compared three different technologies of integrating carbon capturing with coal syngas. The first approach is to integrate water-gas shift with syngas for hydrogen production, and CO 2 separation the before combustion.…”

Section: Application Of Coal Oxycombustion In Power Cyclesmentioning

confidence: 99%

Oxy-fuel combustion technology: current status, applications, and trends

Nemitallah

Habib

Badr

et al. 2017

Int. J. Energy Res.

117

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Summary The increased level of emissions of carbon dioxide into the atmosphere due to burning of fossil fuels represents one of the main barriers toward the reduction of greenhouse gases and the control of global warming. In the last decades, the use of renewable and clean sources of energies such as solar and wind energies has been increased extensively. However, due to the tremendously increasing world energy demand, fossil fuels would continue in use for decades which necessitates the integration of carbon capture technologies (CCTs) in power plants. These technologies include oxycombustion, pre‐combustion, and post‐combustion carbon capture. Oxycombustion technology is one of the most promising carbon capture technologies as it can be applied with slight modifications to existing power plants or to new power plants. In this technology, fuel is burned using an oxidizer mixture of pure oxygen plus recycled exhaust gases (consists mainly of CO2). The oxycombustion process results in highly CO2‐concentrated exhaust gases, which facilitates the capture process of CO2 after H2O condensation. The captured CO2 can be used for industrial applications or can be sequestrated. The current work reviews the current status of oxycombustion technology and its applications in existing conventional combustion systems (including gas turbines and boilers) and novel oxygen transport reactors (OTRs). The review starts with an introduction to the available CCTs with emphasis on their different applications and limitations of use, followed by a review on oxycombustion applications in different combustion systems utilizing gaseous, liquid, and coal fuels. The current status and technology readiness level of oxycombustion technology is discussed. The novel application of oxycombustion technology in OTRs is analyzed in some details. The analyses of OTRs include oxygen permeation technique, fabrication of oxygen transport membranes (OTMs), calculation of oxygen permeation flux, and coupling between oxygen separation and oxycombustion of fuel within the same unit called OTR. The oxycombustion process inside OTR is analyzed considering coal and gaseous fuels. The future trends of oxycombustion technology are itemized and discussed in details in the present study including: (i) ITMs for syngas production; (ii) combustion utilizing liquid fuels in OTRs; (iii) oxy‐combustion integrated power plants and (iv) third generation technologies for CO2 capture. Techno‐economic analysis of oxycombustion integrated systems is also discussed trying to assess the future prospects of this technology. Copyright © 2017 John Wiley & Sons, Ltd.

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“…[12][13][14][15][16][17][18] When comparing capture options, appropriate importance must be given to the efficiency, reliability, and cost of not-currently available technologies. For example, some of the capture technologies presented in the existing literature such as semiclosed cycles 12,16 and the Matiant cycle 14 use CO 2 as a working fluid in the gas turbine and will require development of modified gas turbines. Several IGCC studies 17,19,20 have also shown that improved system integration can increase overall plant efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, a number of researchers has used steady-state simulation and analysis tools to evaluate IGCC plant performance and efficiency, including the impact of different CO 2 capture technologies. − When comparing capture options, appropriate importance must be given to the efficiency, reliability, and cost of not-currently available technologies. For example, some of the capture technologies presented in the existing literature such as semiclosed cycles , and the Matiant cycle use CO 2 as a working fluid in the gas turbine and will require development of modified gas turbines. Several IGCC studies ,, have also shown that improved system integration can increase overall plant efficiency.…”

Section: Introductionmentioning

confidence: 99%

Steady-State Simulation and Optimization of an Integrated Gasification Combined Cycle Power Plant with CO₂ Capture

Bhattacharyya

Turton

Zitney

2010

Ind. Eng. Chem. Res.

100

138

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Integrated gasification combined cycle (IGCC) plants are a promising technology option for power generation with carbon dioxide (CO2) capture in view of their efficiency and environmental advantages over conventional coal utilization technologies. This paper presents a three-phase, top-down, optimization-based approach for designing an IGCC plant with precombustion CO2 capture in a process simulator environment. In the first design phase, important global design decisions are made on the basis of plant-wide optimization studies with the aim of increasing IGCC thermal efficiency and thereby making better use of coal resources and reducing CO2 emissions. For the design of an IGCC plant with 90% CO2 capture, the optimal combination of the extent of carbon monoxide (CO) conversion in the water−gas shift (WGS) reactors and the extent of CO2 capture in the SELEXOL process, using dimethylether of polyethylene glycol as the solvent, is determined in the first phase. In the second design phase, the impact of local design decisions is explored considering the optimum values of the decision variables from the first phase as additional constraints. Two decisions are made focusing on the SELEXOL and Claus unit. In the third design phase, the operating conditions are optimized considering the optimum values of the decision variables from the first and second phases as additional constraints. The operational flexibility of the plant must be taken into account before taking final design decisions. Two studies on the operational flexibility of the WGS reactors and one study focusing on the operational flexibility of the sour water stripper (SWS) are presented. At the end of the first iteration, after executing all the phases once, the net plant efficiency (HHV basis) increases to 34.1% compared to 32.5% in a previously published study (DOE/NETL-2007/1281; National Energy Technology Laboratory, 2007). The study shows that the three-phase, top-down design approach presented is very useful and effective in a process simulator environment for improving efficiency and flexibility of IGCC power plants with CO2 capture. In addition, the study identifies a number of key design variables that has strong impact on the efficiency of an IGCC plant with CO2 capture.

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CO2 Emission Abatement in IGCC Power Plants by Semiclosed Cycles: Part A — With Oxygen-Blown Combustion

Cited by 14 publications

References 5 publications

Aerodynamic analysis of a highly loaded compressor in semi‐closed cycles using a throughflow method

Aerodynamic analysis of a highly loaded compressor in semi‐closed cycles using a throughflow method

Oxy-fuel combustion technology: current status, applications, and trends

Steady-State Simulation and Optimization of an Integrated Gasification Combined Cycle Power Plant with CO₂ Capture

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CO2 Emission Abatement in IGCC Power Plants by Semiclosed Cycles: Part A — With Oxygen-Blown Combustion

Cited by 14 publications

References 5 publications

Aerodynamic analysis of a highly loaded compressor in semi‐closed cycles using a throughflow method

Aerodynamic analysis of a highly loaded compressor in semi‐closed cycles using a throughflow method

Oxy-fuel combustion technology: current status, applications, and trends

Steady-State Simulation and Optimization of an Integrated Gasification Combined Cycle Power Plant with CO2 Capture

Contact Info

Product

Resources

About

Steady-State Simulation and Optimization of an Integrated Gasification Combined Cycle Power Plant with CO₂ Capture