CARSOXY (CO2-Argon-Steam-OxyFuel) Combustion in Gas Turbines for CCS Systems

2021

Gases

Self Cite

Clean, more responsible energy production in gas turbine power plants is a challenge. Interestingly, various alternative sources could be found in agricultural locations with great potential of being transformed from agricultural waste to energy. Corn cob gasification gas could be successfully implemented in gas turbines through co-firing with natural gas. Concurrently, agricultural biogas could also be employed for such a purpose. The technology could be implemented in locations such as Vojvodina, Serbia, which is an agricultural region with great potential for producing biogas from agricultural waste. Therefore, this paper approaches the practical implementation of gas produced by adiabatic corn digestion with CO2 recirculation. Five different cases were assessed. The results are compared to previous analyses that used co-firing of the corn cob gasification gas in representative gas turbine systems. Impacts of the fuel composition on the characteristics of combustion were analyzed using CHEMKIN PRO with GRI–Mech 3.0. Impacts of fuel quality on the power plant performance were analyzed through calculations with a numerical model based on a Brayton cycle of 3.9 MW power output. The application shows acceptable values during co-firing with natural gas without modification of the overall system, with better outlet parameters compared to pure corn gasification gas.

Section: Numerical Model Of a Physical Cyclementioning

confidence: 99%

Comparative Analysis of Gasification and Adiabatic Digestion of Corn for Practical Implementation in Conventional Gas Turbines

Božo¹,

2021

Gases

Self Cite

“…A new mathematical model was developed to understand the impacts of different corn cob gasification gas blends. The model was initially calibrated and used in other works [15,16]. Model development and validation are presented in detail [17].…”

Section: Mathematical Modelmentioning

confidence: 99%

“…The design operation regime was assessed with a 100% load, while the off-design operation regime was evaluated over a range of operating conditions (from 90% to 10% load). The model sensitivity to the following parameters Correlation between the numerical model and an actual turbine using NG/air, [15] This model has been also used successfully to simulate extravagant conditions using OXYFUEL combustion with methane as a fuel (OF) and Argon/CO2/Water vapor as working fluids (CARSOXY) [15,16]. It must be emphasized that the rationale behind the development of this model was to evaluate the potential use of more complex blends, such as corn cob gasification gas combined with methane.…”

Section: Model Calibrationmentioning

confidence: 99%

“…For all conditions, a hybrid Perfectly Stirred Reactor-Plug Flow Reactor (PSR-PFR) network was employed, which is commonly used to simulate mixing and flow characteristics in gas turbine combustor networks [31]. The reactor configuration consists of two clusters; the first cluster is a Perfectly Stirred Reactor (PSR), in which three distinct zones are applied; a mixing zone where fuel is partly premixed, a flame region directly connected to the former and the central recirculation zone (CRZ) where the products are recirculated [15,16]. Recirculation in the first cluster is set at 20% of the product gases, which is approximated from previous experimental campaigns using similar burners [32 -34].…”

Section: Corn Cob Gasification Gas Combustion Modellingmentioning

confidence: 99%

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Fuel quality impact analysis for practical implementation of corn COB gasification gas in conventional gas turbine power plants

Božo¹,

Syred

et al. 2019

Biomass and Bioenergy

Self Cite

Implementation of alternative fuels in gas turbine facilities is a challenging step towards cleaner and more responsible energy production. Despite numerous technical, economical and legal obstacles, possibilities for partial or complete substitution of fossil fuels are still subject of profound research. From all possible solutions, one with high acceptance is the symbiosis of existing gas turbine technologies and new ways of waste biomass energy utilization through firing or co-firing of biomass gasification gas. Therefore, the implementation of corn cob gasification gas with CO2 recirculation in gas turbines is analyzed in this paper. The followed methodology approaches this solution through two different scenarios each with 5 different cases. In the first scenario fuel mass flows are kept constant regardless of the fuel quality change consequence of the corn cob gas share, while in the second scenario fuel volume flows are assumed constant. Impact of fuel composition changes on combustion product characteristics was analyzed using CHEMKIN PRO with GRI-Mech 3.0. Finally, fuel quality impacts on a gas turbine power plant performance are analyzed using a mathematical model that enables the simulation of a 3.9 MW

“…Analyses of some possibilities for the use of ammonia/hydrogen mixtures via humified conditions in gas turbine have been presented in previous literature [5]. A mathematical model developed and calibrated previously has been employed for simulation of a gas turbine in extreme conditions such as OXYFUEL combustion powered by methane (OF) and innovative working fluid blends (i.e., argon/CO 2 /water vapour-CARSOXY) [35,36]. It must be pointed out that the purpose of the model was to determine the possibility of implementation of more complex blends, such as co-firing of the gasification gas originated from corn cob with methane at off-design conditions [37].…”

Section: Introductionmentioning

confidence: 99%

Prediction of Novel Humified Gas Turbine Cycle Parameters for Ammonia/Hydrogen Fuels

Božo¹,

2020

Energies

Self Cite

Carbon emissions reduction via the increase of sustainable energy sources in need of storage defines chemicals such as ammonia as one of the promising solutions for reliable power decarbonisation. However, the implementation of ammonia for fuelling purposes in gas turbines for industry and energy production is challenging when compared to current gas turbines fuelled with methane. One major concern is the efficiency of such systems, as this has direct implications in the profitability of these power schemes. Previous works performed around parameters prediction of standard gas turbine cycles showed that the implementation of ammonia/hydrogen as a fuel for gas turbines presents very limited overall efficiencies. Therefore, this paper covers a new approach of parameters prediction consisting of series of analytical and numerical studies used to determine emissions and efficiencies of a redesigned Brayton cycle fuelled with humidified ammonia/hydrogen blends. The combustion analysis was done using CHEMKIN‐PRO (ANSYS, Canonsburg, PA, USA), and the results were used for determination of the combustion efficiency. Chemical kinetic results denote the production of very low NOx as a consequence of the recombination of species in a post combustion zone, thus delivering atmospheres with 99.2% vol. clean products. Further corrections to the cycle (i.e., compressor and turbine size) followed, indicating that the use of humidified ammonia-hydrogen blends with a total the amount of fuel added of 10.45 MW can produce total plant efficiencies ~34%. Values of the gas turbine cycle inlet parameters were varied and tested in order to determine sensibilities to these modifications, allowing changes of the analysed outlet parameters below 5%. The best results were used as inputs to determine the final efficiency of an improved Brayton cycle fuelled with humidified ammonia/hydrogen, reaching values up to 43.3% efficiency. It was notorious that humidification at the injector was irrelevant due to the high water production (up to 39.9%) at the combustion chamber, whilst further research is recommended to employ the unburned ammonia (0.6% vol. concentration) for the reduction of NOx left in the system (~10 ppm).