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Frontiers of Chemical Science and Engineering

ISSN 2095-0179

ISSN 2095-0187(Online)

CN 11-5981/TQ

邮发代号 80-969

2019 Impact Factor: 3.552

Frontiers of Chemical Science and Engineering  2018, Vol. 12 Issue (4): 697-707   https://doi.org/10.1007/s11705-018-1774-z
  本期目录
Performance assessment of a power-to-gas process based on reversible solid oxide cell
Hanaâ Er-rbib, Nouaamane Kezibri, Chakib Bouallou()
Centre for Energy Efficiency?of Systems, MINES ParisTech, PSL Research University, Paris 75006, France
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Abstract

Due to the foreseen growth of sustainable energy utilization in the upcoming years, storage of the excess production is becoming a rather serious matter. In this work, a promising solution to this issue is investigated using one of the most emerging technologies of electricity conversion: reversible solid oxide cells (RSOC). A detailed model was created so as to study the RSOC performance before implementing it in the global co-electrolysis Aspen PlusTM model. The model was compared to experimental results and showed good agreement with the available data under steady state conditions. The system was then scaled up to a 10 MW co-electrolysis unit operating at 1073 K and 3 bar. The produced syngas is subsequently directed to a methanation unit to produce a synthetic natural gas (SNG) with an equivalent chemical power of 8.3 MWth. Additionally, as a result of a heat integration analysis, the methanation process provides steam and electricity to operate the rest of the units in the process. A final CO2 capture step is added to ensure the required specifications of the produced SNG for gas network injection. Lastly, the overall performance of the power-to-gas process was evaluated taking into account the energy consumption of each unit.

Key wordsrenewable electricity    storage    co-electrolysis    methanation    carbone capture
收稿日期: 2018-03-26      出版日期: 2019-01-03
Corresponding Author(s): Chakib Bouallou   
 引用本文:   
. [J]. Frontiers of Chemical Science and Engineering, 2018, 12(4): 697-707.
Hanaâ Er-rbib, Nouaamane Kezibri, Chakib Bouallou. Performance assessment of a power-to-gas process based on reversible solid oxide cell. Front. Chem. Sci. Eng., 2018, 12(4): 697-707.
 链接本文:  
https://academic.hep.com.cn/fcse/CN/10.1007/s11705-018-1774-z
https://academic.hep.com.cn/fcse/CN/Y2018/V12/I4/697
Fig.1  
Fig.2  
Fig.3  
Experimental data Graves [19] Zhan et al. [20]
Temperature /K 1123 1073
Pressure /MPa 0.1 0.1
Total molar flow in fuel side /(mol?s1) 2.84×10?4 1.74×104
Composition in fuel side /% 1st test 2nd test 3rd test
H2O 45 50 25 50
CO2 45 50 25 25
H2 10 0 25 25
CO 0 0 25 0
Total molar flow in air side /(mol?s?1) 5.68 ×104 5×1010
Composition in air side /% 1st test 2nd test 3rd test
O2 1 1 1 1
N2 0 0 0 0
Tab.1  
Fig.4  
Fig.5  
Fig.6  
Fig.7  
Stream Feed gas 1st Reactor outlet 2nd Reactor outlet 3rd Reactor outlet
Flow rate /(kmol?h−1) H2 103 23.4 9.83 2.60
CO 33.9 4.60 0.75 0.05
H2O 3.79 29.0 33.8 37.1
CO2 10.4 12.5 11.9 10.7
CH4 27.3 31.7 33.6
Temperature /K 553 909 785 654
Pressure /bar 15.4 15.2 14.0 13.4
Tab.2  
Fig.8  
Fig.9  
BOP Component Electric consumption /kW Unrecovered cooling power
Thermal power /kW Hot source temperature /K Corresponding electric power /kW
Co-electolyzer unit Electric heater 64.7
Cooler –57.9 343 –8.45
Methanation unit Condenser –620 441 –208
Gas compressor 534
Recycle compressor 22.4
Pump 6.75
CO2 capture unit MEA cooler –258 330 –29.1
Pump 6.60
Total BOP consumption 634.5 Unrecovered heat –245.5
Tab.3  
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