Co-production of synthesis gas and power by integration of Partial Oxidation reactor, gas turbine and air separation unit

Albrecht, B.A.; Kok, Jacobus B.W.; Meer, Theodorus H. van der

doi:10.1504/ijex.2007.015078

Cited by 5 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One important idea behind this work was that carbon-fibre-reinforced-carbon composites (C/C) may be used as a construction material for turbines in the fuel rich regime, since they survive much higher temperatures in a reducing atmosphere as opposed to an oxidizing atmosphere where carbon would burn. A similar idea using a partial oxidation gas turbine with a subsequent catalytic reactor was discussed earlier by Heyen and Kalitventzeff (Heyen & Kalitventzeff, 1999), while recently Albrecht et al (Albrecht, Kok, & van der Meer, 2007) proposed a favourable plant that integrates a partial oxidation reactor, a synthesis gas turbine and an air separation unit.…”

Section: Introductionmentioning

confidence: 84%

Gas turbines for polygeneration? A thermodynamic investigation of a fuel rich gas turbine cycle

Atakan¹

2011

Int. J. Thermo

View full text Add to dashboard Cite

Gas turbines as used nowadays are working far in the fuel lean regime, which is most reasonable for mobile applications, since the formation of pollutants and soot are avoided while the temperatures remain low enough to avoid damage of the turbine. However, from a thermodynamic point of view the exergy utilization is far from optimum at such conditions. For stationary conditions a different approach may be worth a second thought: the use of gas turbines as chemical reactors for hydrogen and carbon monoxide production in combination with power generation and the utilization of the exhaust enthalpy stream. A gas turbine model cycle is analyzed using complex equilibria including radicals and chemical exergies. Chemical exergies were calculated from equilibrating the gas mixtures at different points in each process with a large excess of moist air. Methane was studied as an example fuel. Comparing the exergy losses of the idealized gas turbine process, the losses for fuel rich mixtures are lower than for lean mixtures used in gas turbines nowadays. The exact values of the exergetic efficiency depend on the pressure ratio, which was studied in the range of 10 to 30. The hydrogen to carbon monoxide ratio would be typically near 2.2, while the adiabatic flame temperature would be in a range which either would cause no damage to typical gas turbines or could be handled with carbon fiber reinforced carbon. The composition of the gases is likely to change within the turbine, where temperature and enthalpy drops. This was considered in additional calculations where chemical equilibration of the gas mixture in the turbine is considered. The possibility to combine a partial oxidation with an energy conversion process and thus produce syngas mixtures would add an additional flexibility to the gas turbine process, which is worth consideration.

show abstract

Section: Introductionmentioning

confidence: 84%

Gas turbines for polygeneration? A thermodynamic investigation of a fuel rich gas turbine cycle

Atakan¹

2011

Int. J. Thermo

View full text Add to dashboard Cite

show abstract

“…Hereafter, the paper focuses on terrestrial applications. Whatever the use would be, thermodynamics appears as an essential tool for studying and improving Gas Turbines and polygeneration systems performance [4][5][6][7][8].…”

Section: State Of Artmentioning

confidence: 99%

“…33). Furthermore, the computation follows the same steps as for the previous case, namely Equations (7,9,35,23,36,(26)(27)(28)(29)(30) are used in order to get the results corresponding to this case.…”

Section: Case With the Recuperator Connected Downstream Of The Usefulmentioning

confidence: 99%

Optimization of Gas Turbine Cogeneration Systemfor Various Heat Exchanger Configurations

Costea

Feidt

Grigore

et al. 2011

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

View full text Add to dashboard Cite

Résumé -Optimisation des systèmes de turbine à combustion en cogénération pour différentes configurations des échangeurs de chaleur -Cet article explore et compare les performances des trois configurations de systèmes de turbine à combustion permettant la production combinée de chaleur et d'électricité, sur la base du cycle irréversible régénératif de Brayton-Joule. Le modèle proposé est développé pour deux contraintes différentes sur le cycle, notamment le flux de chaleur produit par combustion imposé ou la température maximale du cycle imposée. Le modèle considère également l'irréversibilité due au frottement dans le compresseur et la turbine et celle due aux pertes de chaleur dans la chambre de combustion et les échangeurs de chaleur. Le rendement au sens du premier principe du système sans et avec cogénération et le rendement exergétique rendent compte des avantages de la cogénération, et aident le concepteur à choisir la meilleure configuration de turbines à combustion en fonction de ses besoins. Des données expérimentales d'une microturbine opérationnelle ont été utilisées pour valider le modèle. La puissance fournie et les rendements au sens du premier principe et exergétique sont optimisés par rapport à un ensemble de paramètres de fonctionnement. Les valeurs optimales des paramètres du moteur à turbine à combustion qui correspondent au maximum de puissance fournie, respectivement au maximum de rendement thermodynamique sont discutées. Les résultats montrent que la plupart des performances maximales correspondent aux mêmes valeurs optimales du taux de compression pour le flux imposé, sauf le rendement exergétique maximum qui demande des valeurs plus élevées du taux de compression que celles pour le maximum du flux d'exergie. Une comparaison des performances de ces trois configurations et les perspectives sont proposées. Abstract -Optimization of Gas Turbine Cogeneration System for Various Heat Exchanger

show abstract

“…(1), the negative value of the heat of reaction Dh indicates that the rich combustion process is exothermic when viewed from reactants to products.. In industrial applications of this process, temperatures range between 1400 and 1800 K and pressures are up to 150 bar (Albrecht, 2004;Albrecht et al, 2007). Due to the high temperature and pressure of the syngas produced by ultra rich combustion, the syngas sensible heat can be efficiently converted to power by expansion in a gas turbine expander (Albrecht, 2004;Albrecht et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…In industrial applications of this process, temperatures range between 1400 and 1800 K and pressures are up to 150 bar (Albrecht, 2004;Albrecht et al, 2007). Due to the high temperature and pressure of the syngas produced by ultra rich combustion, the syngas sensible heat can be efficiently converted to power by expansion in a gas turbine expander (Albrecht, 2004;Albrecht et al, 2007). To analyze the performance of the reactor with a view to bulk chemicals production, the composition of the syngas can be estimated at equilibrium.…”

Section: Introductionmentioning

confidence: 99%

Prediction and Measurement of the Product Gas Composition of the Ultra Rich Premixed Combustion of Natural Gas: Effects of Equivalence Ratio, Residence Time, Pressure, and Oxygen Concentration

Albrecht¹,

Kok²,

Dijkstra³

et al. 2009

Combustion Science and Technology

View full text Add to dashboard Cite

The ultra rich combustion (partial oxidation) of natural gas to hydrogen and carbon monoxide is theoretically and experimentally investigated. The effect of the process parameters equivalence ratio, residence time, pressure, and composition of the oxidizer is explored. Computations are performed with the use of the chemical kinetics simulation package CHEMKIN. First, the ultra rich combustion process is modeled as a freely propagating flame in order to establish the rich flame propagation properties. An Arrhenius correlation of the laminar flame speed with the adiabatic flame temperature is found with activation temperature 20,000 K. Subsequently, perfectly stirred reactor (PSR) computations were performed. From these, it is concluded that optimal natural gas conversion to hydrogen and carbon monoxide requires a residence time of at least 50 ms and, depending on residence time, an equivalence ratio between 2 and 4. To reach chemical equilibrium in ultra rich mixtures, the residence time is very long (>1000 ms). The model predictions are validated by experiments on ultra rich combustion of natural gas by means of air enriched to 40% oxygen concentration at up to 3 bar and 300 kW. The effect of equivalence ratio at residence time 50 ms was investigated. Good comparison was found between measurements and model predictions on carbon monoxide, hydrogen, and the soot precursor acetylene. It can be concluded that the model provides reliable information on product gas concentrations as a result of ultra rich combustion of natural gas.

show abstract

Co-production of synthesis gas and power by integration of Partial Oxidation reactor, gas turbine and air separation unit

Cited by 5 publications

References 0 publications

Gas turbines for polygeneration? A thermodynamic investigation of a fuel rich gas turbine cycle

Gas turbines for polygeneration? A thermodynamic investigation of a fuel rich gas turbine cycle

Optimization of Gas Turbine Cogeneration Systemfor Various Heat Exchanger Configurations

Prediction and Measurement of the Product Gas Composition of the Ultra Rich Premixed Combustion of Natural Gas: Effects of Equivalence Ratio, Residence Time, Pressure, and Oxygen Concentration

Contact Info

Product

Resources

About