Thermodynamic analysis of synthetic hydrocarbon fuel production in pressurized solid oxide electrolysis cells

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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@article{f2c8bc4e818d43dea5230a09f7cd2993,
title = "Thermodynamic analysis of synthetic hydrocarbon fuel production in pressurized solid oxide electrolysis cells",
keywords = "Solid oxide electrolysis cells, Thermodynamic analysis, Synthetic fuel production",
publisher = "Pergamon",
author = "Xiufu Sun and Ming Chen and Jensen, {Søren Højgaard} and Ebbesen, {Sune Dalgaard} and Graves, {Christopher R.} and Mogensen, {Mogens Bjerg}",
year = "2012",
doi = "10.1016/j.ijhydene.2012.08.125",
volume = "37",
number = "22",
pages = "17101--17110",
journal = "International Journal of Hydrogen Energy",
issn = "0360-3199",

}

RIS

TY - JOUR

T1 - Thermodynamic analysis of synthetic hydrocarbon fuel production in pressurized solid oxide electrolysis cells

A1 - Sun,Xiufu

A1 - Chen,Ming

A1 - Jensen,Søren Højgaard

A1 - Ebbesen,Sune Dalgaard

A1 - Graves,Christopher R.

A1 - Mogensen,Mogens Bjerg

AU - Sun,Xiufu

AU - Chen,Ming

AU - Jensen,Søren Højgaard

AU - Ebbesen,Sune Dalgaard

AU - Graves,Christopher R.

AU - Mogensen,Mogens Bjerg

PB - Pergamon

PY - 2012

Y1 - 2012

N2 - A promising way to store wind and solar electricity is by electrolysis of H2O and CO2 using solid oxide electrolysis cells (SOECs) to produce synthetic hydrocarbon fuels that can be used in existing fuel infrastructure. Pressurized operation decreases the cell internal resistance and enables improved system efficiency, potentially lowering the fuel production cost significantly. In this paper, we present a thermodynamic analysis of synthetic methane and dimethyl ether (DME) production using pressurized SOECs, in order to determine feasible operating conditions for producing the desired hydrocarbon fuel and avoiding damage to the cells. The main parameters of cell operating temperature, pressure, inlet gas composition and reactant utilization are varied to examine how they influence cell thermoneutral and reversible potentials, in situ formation of methane and carbon at the Ni–YSZ electrode, and outlet gas composition. For methane production, low temperature and high pressure operation could improve the system efficiency, but might lead to a higher capital cost. For DME production, high pressure SOEC operation necessitates higher operating temperature in order to avoid carbon formation at higher reactant utilization. Optimal operating conditions are dependent on the total system design.

AB - A promising way to store wind and solar electricity is by electrolysis of H2O and CO2 using solid oxide electrolysis cells (SOECs) to produce synthetic hydrocarbon fuels that can be used in existing fuel infrastructure. Pressurized operation decreases the cell internal resistance and enables improved system efficiency, potentially lowering the fuel production cost significantly. In this paper, we present a thermodynamic analysis of synthetic methane and dimethyl ether (DME) production using pressurized SOECs, in order to determine feasible operating conditions for producing the desired hydrocarbon fuel and avoiding damage to the cells. The main parameters of cell operating temperature, pressure, inlet gas composition and reactant utilization are varied to examine how they influence cell thermoneutral and reversible potentials, in situ formation of methane and carbon at the Ni–YSZ electrode, and outlet gas composition. For methane production, low temperature and high pressure operation could improve the system efficiency, but might lead to a higher capital cost. For DME production, high pressure SOEC operation necessitates higher operating temperature in order to avoid carbon formation at higher reactant utilization. Optimal operating conditions are dependent on the total system design.

KW - Solid oxide electrolysis cells

KW - Thermodynamic analysis

KW - Synthetic fuel production

U2 - 10.1016/j.ijhydene.2012.08.125

DO - 10.1016/j.ijhydene.2012.08.125

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 22

VL - 37

SP - 17101

EP - 17110

ER -