Ali, Shahid

Nielsen, Mads Pagh

Sørensen, Kim

English

*skk@iet.aau.dk www.iet.aau.dk Power-to-Gas/Liquid - biomass gasification and SOEC combined system Shahid Ali*, Kim  Sørensen, Mads P. Nielsen Department of Energy Technology, Aalborg University, Pontoppidanstræde 111, DK-9220 Aalborg Øst, Denmark Motivation Future Work Conclusion System Modeling   Models for Sub-systems i.e. Biomass Gasification, Solid Oxide Electrolysis (SOEC), Synthesis Reactor etc. using Aspen plus   Complete model combining all components  Electrolysis   The ability to produce hydrogen at elevated pressure to reduce energy demand and investment costs for compressors   Higher efficiency to avoid energy loses   Dynamic behaviors to avoid fluctuating  power input   Gasification   High purity and an adaptable flow rate of syngas to suit the fluctuating demand   Temperature, Pressure, recycle ratio to control the syngas composition   Gasifying agent - O2 /O2+CO2/ O2+CO2+ Steam    Combined System   Integration and optimization of  the components for combined process       Electricity Surplus and storage Gigantic surplus of electricity in future (i.e. between 7 and 11 TWh!)   Lower efficiency i.e. Alkaline electrolysis (low temperature electrolysis)   Limited biomass source (lower efficiency e.g. Gasifier + Methanol ~ 59%)1,2   CO2 emissions, Fossil free (EU Environment,  Denmark Energy policy)    Power-to-Gas, Power-to-Liquid, Power-to-Chemicals etc.   High temperature electrolysis    Combine system (E+G)  (Higher efficiency e.g. Gaisfier+SOEC+Methanol ~71%)1   Renewable fuels e.g. SNG, DME Methanol etc.           Optimization methodology on the combined system   Pinch Analysis  Development of mathematical programming models for heat exchanger network design  Exergy Analysis   Economic Analysis   Potential to store heat over varying electricity prices  Cost analysis for the components  Cost analysis for complete combined system    Syngas composition produced from gasification is comparable with literature   Cold gas efficiency of gasifier is around 85%    Better energy efficiency for the processes with SOEC   No CO2 removal unit for the processes with H2 (saving cost and environment)   Excess heat available for steam production    References 1) Synthesis of Methanol from Biomass/CO2 Resources. Specht, M., et al., et al. Amsterdam : s.n., 1999. Greenhouse Gas Control Technologies. p. 723.  2) Hydrogen from renewable electricity: An international review of power-to-gas pilot plants for stationary applications. Gahleitner, Gerda. s.l. : International Journal of Hydrogen Energy, 2013, Vol. 38, pp. 2039-2061. LHV  efficiency % Gasifier + SOEC Only Gasifier Methanol 71,54 55,59 SNG 72,73 59,87 Synthesis Reactions System Efficiency Methdology 020406080100200 220 240 260 280 300CO conversion (%) Temperature (C) 80 bar 50 bar 30 barCO (L) and CO2 (R) conversion as a function of methanol synthesis reactor outlet temperature and reactor pressure 2H2+CO ↔ CH3OH 020406080100200 220 240 260 280 300CO2 conversion (%) Temperature (C) 80 bar 50 bar 30 bar3H2+CO2 ↔ CH3OH+H2O 

Power to Gas/Liquid - biomass gasification and SOEC combined system:Poster

https://vbn.aau.dk/files/334431021/ICE_2017_F2.pdf

Power to Gas/Liquid - biomass gasification and SOEC combined system:Poster

Abstract

Similar works

Full text

Available Versions

VBN