Long-term coal gasification-based power plants with near-zero emissions. Part A: Zecomix cycle

Romano, Matteo Carmelo; Lozza, Giovanni

doi:10.1016/j.ijggc.2009.11.009

Cited by 26 publications

(10 citation statements)

References 11 publications

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“…The code is a powerful and flexible tool that can be used to predict the performance of a wide variety of chemical processes and systems for electricity production. GS code was originally designed to calculate gas-steam cycles (Lozza, 1990;Consonni et al, 1991;Consonni, 1992) and has been progressively extended and developed to calculate complex systems including gasification processes, chemical reactors, fuel cells and essentially any kind of plant for power generation from fossil fuels (Chiesa et al, 2005a(Chiesa et al, , 2008Romano and Lozza, 2009). Ideal behavior is assumed for all the mixtures, whose thermodynamic properties are calculated by means of NASA polynomials (Gardiner, 1984) based on JANAF tables data (Stull and Prophet, 1971).…”

Section: Calculation Tools and Assumptionsmentioning

confidence: 99%

Pre-combustion CO2 capture from natural gas power plants, with ATR and MDEA processes

Romano

Chiesa

Lozza

2010

International Journal of Greenhouse Gas Control

102

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Section: Calculation Tools and Assumptionsmentioning

confidence: 99%

Pre-combustion CO2 capture from natural gas power plants, with ATR and MDEA processes

Romano

Chiesa

Lozza

2010

International Journal of Greenhouse Gas Control

102

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“…From Figures 2 and 3 Figure 2 Effects of T on the gasification products when p is 7 MPa and R is 0.4 CH 4 formation reaction, R8, is exothermic while the main CO formation reactions, R9 and R10, are endothermic [7,27]. Thus, the phenomena can be explained with the Le Chatelier's Principle [28].…”

Section: Effects Of T P and R On The Gasification Productsmentioning

confidence: 99%

Chemical Equilibrium Model and Prediction for Coal Hydrogasification

Yan

et al. 2014

International Journal of Chemical Reactor Engineering

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Researches on coal hydrogasification (CHG) which is the core component of the zero emission coal (ZEC) system are rarely reported and the characteristics of CHG have not been well understood. A chemical equilibrium model (CEM) for coal hydrogasification is proposed in this work to study the effects of different reaction conditions on the CHG characteristics. The results from the model are then validated against literature available experimental data and the model is proved reliable. After the validation, sensitivity analysis on the CHG process is done and meaningful results are obtained. Increasing the reaction pressure (p) and H 2 /coal mass ratio (R) or decreasing the reaction temperature (T) can enhance the hydrogasification reactions. The carbon conversion rate begins to decrease at 800 K and 1,250 K for operation pressures of 0.1 MPa and 7 MPa, respectively. Remarkable effects on the gasification characteristics are found when p is lower than 1 MPa. At 7 MPa and 1,000 K, carbon is entirely converted when R is 0.25 and the maximum CH 4 mole fraction is reached. In the case that T is variable, carbon will be all converted at 7 MPa when R is about 0.5. Carbon will never be all converted at 0.1 MPa no matter how high R is. Mole fraction of CH 4 will decrease with R both at the pressures of 7 MPa and 0.1 MPa.

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“…The thermodynamic model of the assessed power cycles is carried out with the modular simulation code "GS", a tool developed since several years at the Energy Department of Politécnico di Milano, which has proved to yield highly accurate results in a variety of complex plant configurations, including all kinds of gas turbine cycles, combined cycles and hybrid cycles [23][24][25]. The code integrates models for the prediction of steam turbines [26] and FC performance [27][28][29].…”

Section: Calculation Tools and Assumptionsmentioning

confidence: 99%

Analysis of Direct Carbon Fuel Cell Based Coal Fired Power Cycles With CO2 Capture

Campanari¹,

Gazzani²,

Romano

2012

Journal of Engineering for Gas Turbines and Power

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This work presents an analysis of the application of direct carbon fuel cells (DCFC) to large scale, coal fueled power cycles. DCFCs are a type of high temperature fuel cell featuring the possibility of being fed directly with coal or other heavy fuels, with high tolerance to impurities and contaminants (e.g., sulfur) contained in the fuel. Different DCFC technologies of this type are developed in laboratories, research centers or new startup companies, although at kW-scale, showing promising results for their possible future application to stationary power generation. This work investigates the potential application of two DCFC categories, both using a "molten anode medium" which can be (i) a mixture of molten carbonates or (ii) a molten metal (liquid tin) flowing at the anode of a fuel cell belonging to the solid oxide electrolyte family. Both technologies can be considered particularly interesting for the possible future application to large scale, coal fueled power cycles with CO2 capture, since they both have the advantage of oxidizing coal without mixing the oxidized products with nitrogen; thus releasing a high CO2 concentration exhaust gas. After a description of the operating principles of the two DCFCs, it is presented a lumped-volume thermodynamic model which reproduces the DCFC behavior in terms of energy and material balances, calibrated over available literature data. We consider then two plant layouts, using a hundred-MW scale coal feeding, where the DCFC generates electricity and heat recovered by a bottoming steam cycle, while the exhaust gases are sent to a CO2 compression train, after purification in appropriate cleaning processes. Detailed results are presented in terms of energy and material balances of the proposed cycles, showing how the complete system may surpass 65% lower heating value electrical efficiency with nearly complete (95%-\-) CO2 capture, making the system very attractive, although evidencing a number of technologically critical issues.(1) DCFC types belonging to the second category are developed for instance by Contained Energy LLC. with a MCFC-based technology using molten carbonates at the electrolyte and as a molten anode medium.

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Long-term coal gasification-based power plants with near-zero emissions. Part A: Zecomix cycle

Cited by 26 publications

References 11 publications

Pre-combustion CO2 capture from natural gas power plants, with ATR and MDEA processes

Pre-combustion CO2 capture from natural gas power plants, with ATR and MDEA processes

Chemical Equilibrium Model and Prediction for Coal Hydrogasification

Analysis of Direct Carbon Fuel Cell Based Coal Fired Power Cycles With CO2 Capture

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