Integration of Solid Oxide Electrolyzer and Fischer-Tropsch: A sustainable pathway for synthetic fuel

Abstract Because of their easy and widespread distribution and safe handling, liquid fuels are used in everyday life, to power vehicles, aircrafts, ships, etc. The use of fuels from conventional fossil sources is now called for a more sustainable alternative. Hence, chemical energy storage of electricity generated by renewable sources into synthetic fuels represents an interesting solution, solving also other typical problems with renewables, such as grid stabilization. Within this framework, the present study deals with the production of synthetic green fuels by means of the Fischer-Tropsch process, downstream a previous electricity-to-gas conversion achieved operating a Solid Oxide Electrolyzer (SOE) stack in co-electrolysis. With reference to the state of the art, this study developed the concept of integrating an SOE and a Fischer-Tropsch process in a small plant size, which is compatible with renewables power density. To this aim, fuel upgrading is supposed to be performed separately. Based on experimental results on a Solid Oxide Cells stack operated in co-electrolysis, three system-level models were developed, evaluating the most performing option. Thus, considering a plant capacity of 1 bbl/day of liquid fuel, in the best scheme, the electricity-to-liquid efficiency was estimated to be 57.2%. Materials introduced into the system are simply water (33,701 ton/MJ) and carbon dioxide (79,795 ton/MJ). While hydrogen is necessary to feed the SOE, net consumption is zero because it is recovered from Fischer-Tropsch product lighter fraction.

[1]  Jincan Chen,et al.  Evaluation and calculation on the efficiency of a water electrolysis system for hydrogen production , 2010 .

[2]  Ji Haeng Yu,et al.  Hydrogen production performance of 3-cell flat-tubular solid oxide electrolysis stack , 2012 .

[3]  S. Ebbesen,et al.  Co-electrolysis of CO2 and H2O in solid oxide cells: Performance and durability , 2011 .

[4]  Andre Peter Steynberg,et al.  Introduction to Fischer-Tropsch Technology , 2004 .

[5]  Gene Petersen,et al.  Nongovernmental valorization of carbon dioxide. , 2005, The Science of the total environment.

[6]  Boxuan Yu,et al.  Microstructural modification of the anode/electrolyte interface of SOEC for hydrogen production , 2012 .

[7]  Yu Luo,et al.  Experimental characterization and modeling of the electrochemical reduction of CO2 in solid oxide electrolysis cells , 2013 .

[8]  S. Ebbesen,et al.  Electrolysis of carbon dioxide in Solid Oxide Electrolysis Cells , 2009 .

[9]  James E. O'Brien,et al.  Parametric study of large-scale production of syngas via high-temperature co-electrolysis , 2007 .

[10]  Chakib Bouallou,et al.  Recycling of Carbon Dioxide to Produce Ethanol , 2013 .

[11]  N. Brandon,et al.  Hydrogen production through steam electrolysis: Model-based steady state performance of a cathode-supported intermediate temperature solid oxide electrolysis cell , 2007 .

[12]  A. Brisse,et al.  A review and comprehensive analysis of degradation mechanisms of solid oxide electrolysis cells , 2013 .

[13]  Van Nhu Nguyen,et al.  Long-term tests of a Jülich planar short stack with reversible solid oxide cells in both fuel cell and electrolysis modes , 2013 .

[14]  K. Lackner,et al.  Sustainable hydrocarbon fuels by recycling CO2 and H2O with renewable or nuclear energy , 2011 .

[15]  Christopher Graves,et al.  Production of Synthetic Fuels by Co-Electrolysis of Steam and Carbon Dioxide , 2009 .

[16]  Yixiang Shi,et al.  Performance and methane production characteristics of H2O–CO2 co-electrolysis in solid oxide electrolysis cells , 2013 .

[17]  Umberto Desideri,et al.  Theoretical study and performance evaluation of hydrogen production by 200 W solid oxide electrolyzer stack , 2014 .

[18]  Floriane Petipas,et al.  Transient operation of a solid oxide electrolysis cell , 2013 .

[19]  J. O’Brien,et al.  High-temperature electrolysis for large-scale hydrogen and syngas production from nuclear energy: summary of system simulation and economic analyses , 2010 .

[20]  Burtron H. Davis,et al.  Fischer–Tropsch synthesis: The paraffin to olefin ratio as a function of carbon number , 2005 .

[21]  S. Ebbesen,et al.  Durable SOC stacks for production of hydrogen and synthesis gas by high temperature electrolysis , 2011 .

[22]  J. Andrews,et al.  Re-envisioning the role of hydrogen in a sustainable energy economy , 2012 .

[23]  D. J. Wilhelm,et al.  Syngas production for gas-to-liquids applications: technologies, issues and outlook , 2001 .

[24]  Carl M. Stoots,et al.  Performance Measurements of Solid-Oxide Electrolysis Cells for Hydrogen Production , 2005 .

[25]  Andrea Lanzini,et al.  A comparative assessment on hydrogen production from low- and high-temperature electrolysis , 2013 .

[26]  R. Zennaro,et al.  Gas to liquids technologies for natural gas reserves valorization: The Eni experience , 2009 .

[27]  F. Yu,et al.  Application of Fischer–Tropsch Synthesis in Biomass to Liquid Conversion , 2012 .

[28]  Scott A. Barnett,et al.  High efficiency electrical energy storage using a methane–oxygen solid oxide cell , 2011 .

[29]  André Faaij,et al.  Production of FT transportation fuels from biomass; technical options, process analysis and optimisation, and development potential , 2004 .

[30]  M. Melaina,et al.  Production of Fischer–Tropsch liquid fuels from high temperature solid oxide co-electrolysis units , 2012 .

[31]  A. Kargari,et al.  Application of Anderson–Schulz–Flory (ASF) equation in the product distribution of slurry phase FT synthesis with nanosized iron catalysts , 2007 .

[32]  Jan Pawel Stempien,et al.  Energy and exergy analysis of Solid Oxide Electrolyser Cell (SOEC) working as a CO2 mitigation device , 2012 .

[33]  Boyd H. Pro,et al.  Energy and land use impacts of sustainable transportation scenarios , 2005 .

[34]  C. Satterfield,et al.  Intrinsic kinetics of the Fischer-Tropsch synthesis on a cobalt catalyst , 1991 .

[35]  Chakib Bouallou,et al.  Valorization of Carbon Dioxide by Co-Electrolysis of CO2/H2O at High Temperature for Syngas Production , 2013 .

[36]  Carl M. Stoots,et al.  Results of recent high temperature coelectrolysis studies at the Idaho National Laboratory , 2007 .

[37]  Mogens Bjerg Mogensen,et al.  Thermodynamic analysis of synthetic hydrocarbon fuel production in pressurized solid oxide electrolysis cells , 2012 .

[38]  Lin Zhao,et al.  Electrochemical reduction of CO2 in solid oxide electrolysis cells , 2010 .

[39]  S. Long,et al.  What is the maximum efficiency with which photosynthesis can convert solar energy into biomass? , 2008, Current opinion in biotechnology.