Carbon monoxide reduction in solid oxide fuel cell–mini gas turbine hybrid power system


In this paper, combined heat and power frameworks employing solid oxide fuel cell power module and a small-scale gas turbine are presented. The offered system is utilized as heat and power supply for residential consumers with a carbon dioxide sorption circulating fluidized bed. As well a favorable solution for the high penalties associated with CO2 capture and reuse of the CO contents is offered. The combined heat and power system considered by a different arrangement in order to high proficiency, controllability, heat recovery and high capacity of energy. In the proposed system, the unburned product from the solid oxide fuel cell is re-extracted and utilized as a fuel source. The suggested system is analyzed by the first and second law of thermodynamics. During this study, comprehensive calculations of chemistry and thermal within the fuel cell are performed to get accurate results. The impact of various parameters, for example fuel and oxidant rate, carbon dioxide removal, operating pressure, compressor parameter on work and heat output of the cycle as well as the discharge of carbon dioxide contamination, is investigated. The optimal pressure ratio of the compressor to minimize the carbon dioxide production is found.

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Area (m2)


Specific heat at constant pressure (kJ kmol−1 K−1)

e :

Specific exergy flow (kW kg−1)

E :

The reversible voltage of the fuel cell (V)

E 0 :

Fuel cell voltage under standard conditions (V)

ED :

Exergy destruction

EL :

Exergy lost

F :

Faraday’s constant (96485 C mol−1)

h :

Enthalpy (kJ kmol−1)


Current density (A m−2)


Current (A)

K p :

Equilibrium constant

k :

The ratio of specific heats


Lower heating value (kJ kmol−1)

n :

Molar flow rate (kmol s−1)

n e :

Number of electrons

P :

Pressure (kPa)

Q :

Heat generation rate (kW)

rp :

compressor pressure ratio

R u :

Universal gas constant (8.314 J mol−1 K−1)


Entropy (kJ/kmol K)

T :

Temperature (K)

U f :

Fuel utilization coefficient

V act :

Activation loss (V)

V conc :

Concentration loss (V)

V ohm :

Ohmic loss (V)

V loss :

Voltage loss (V)

V cell :

Cell voltage (V)

W :

Power (kW)

x :

Molar rates of progress of the cell reforming reactions (kmol s−1)

y :

Molar rates of progress of the cell shifting reactions (kmol s−1)

z :

Molar rates of progress of the cell overall reactions (kmol s−1)

η :


v :

Specific volume








Alternating current




Air compressor


Fuel cell


Fuel compressor


Direct current


Overall reactions






Gas species










Mini gas turbine




Reforming reaction




Solid oxide fuel cell


Shifting reaction












Water pump


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Correspondence to M. Y. A. Jamalabadi.

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Jamalabadi, M.Y.A. Carbon monoxide reduction in solid oxide fuel cell–mini gas turbine hybrid power system. J Therm Anal Calorim 135, 1871–1880 (2019).

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  • Mini turbine
  • Solid compound cell
  • Entropy generation
  • Exergy analysis