Modeling of a combined CH4-assisted solid oxide co-electrolysis and Fischer-Tropsch synthesis system for low-carbon fuel production

Haoran Xu, M. Mercedes Maroto-Valer, Meng Ni, Jun Cao, Jin Xuan

Research output: Contribution to journalConference article

14 Downloads (Pure)

Abstract

CH4-assisted solid oxide electrolyzer cells (SOECs) can co-electrolyze H2O and CO2 effectively for simultaneous energy storage and CO2 utilization. Compared with conventional SOECs, CH4-assisted SOECs consume less electricity because CH4 in the anode provides part of the energy for electrolysis. As syngas (CO and H2 mixture) is generated from the co-electrolysis process, it is necessary to study its utilization through the subsequent processes, such as Fischer-Tropsch (F-T) synthesis. An F-T reactor can convert syngas into hydrocarbons, and thus it is very suitable for the utilization of syngas. In this paper, the combined CH4-assisted SOEC and F-T synthesis system is numerically studied. Validated 2D models for CH4-assisted SOEC and F-T processes are adopted for parametric studies. It is found that the cathode inlet H2O/ CO2 ratio in the SOEC significantly affects the production components through the F-T process. Other operating parameters such as the operating temperature and applied voltage of the SOEC are found to greatly affect the productions of the system. This model can be used for understanding and design optimization of the combined fuel-assisted SOEC and F-T synthesis system to achieve economical hydrocarbon generation.

Original languageEnglish
Pages (from-to)1666-1671
Number of pages6
JournalEnergy Procedia
Volume158
DOIs
Publication statusPublished - Feb 2019
Event10th International Conference on Applied Energy 2018 - Hong Kong, Hong Kong
Duration: 22 Aug 201825 Aug 2018

Keywords

  • Fischer-Tropsch synthesis
  • Hydrocarbon generation
  • Mathematical modeling
  • Solid oxide electrolyzer cell

ASJC Scopus subject areas

  • Energy(all)

Fingerprint Dive into the research topics of 'Modeling of a combined CH<sub>4</sub>-assisted solid oxide co-electrolysis and Fischer-Tropsch synthesis system for low-carbon fuel production'. Together they form a unique fingerprint.

  • Cite this