Energy Efficiency Analysis in Solid Oxide Electrolysis Cell System for Production of Hydrogen, Methane and Methanol
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Abstract
This research aims to study the solid oxide electrolysis cell (SOEC) system with methane synthesis and methanol synthesis. Exhaust gas from the coal power plant was used as feedstock. These processes were designed and simulated by Aspen plus v.9.0. The developed model was employed to study the optimal operating conditions, generating the maximum product yields and the highest energy efficiency. The effect of several parameters including SOEC temperature and pressure (550-1,000 ºC, 1-30 bar), methane synthesis temperature and pressure (200-600 ºC, 1-100 bar), and methanol synthesis temperature and pressure (140-280 ºC, 15-100 bar) were investigated with energy efficiency analysis. The simulation results showed that the optimal operating conditions which provided the maximum hydrogen production were SOEC temperature of 800 ºC, pressure of 1 bar, and energy efficiency of 14.95 %. The optimal operating conditions for methane synthesis were temperature of 200 ºC, pressure of 1 bar, and energy efficiency of 69.97 %. The optimal operating conditions for methanol synthesis were temperature of 160 ºC, pressure of 100 bar, and energy efficiency of 75.42 %.
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References
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