Modelling of one-step methanation process combining SOECs and fischer-tropsch-like reactor

Bin Chen, Haoran Xu, Long Chen, Yihang Li, Changrong Xia, Meng Ni

Research output: Journal article publicationJournal articleAcademic researchpeer-review

16 Citations (Scopus)

Abstract

One-step methanation tubular cell integrating high temperature Solid Oxide Electrolysis Cells (SOEC section) at 800°C and low temperature Fischer-Tropsch-like reactor (FT section) at 250°C is a novel design for energy conversion from power to fuel. In this simple and compact design, syngas (H2/CO mixture) produced from co-electrolysis of H2O/CO2inside SOEC section can undergo reversed methane reforming reaction at favorable low temperature in the FT section for CH4production. A 2D-axisymmetry model is developed to study the coupled transport and reactions in the methanation cell. The heat and mass transfer, electrochemical reactions and chemical reactions such as Waster Gas Shift Reaction (WGSR) and Methane Steam Reforming Reaction (MSR) are fully considered. Parametric simulations are conducted to investigate the effects of applied voltage, length of FT section, operating temperature and inlet gas composition on CH4generation. Optimal inlet gas composition is found both with (H2:CO2= 3.566, 20%vol H2O) or without (CO2:H2O = 0.3566) H2assisting.
Original languageEnglish
Pages (from-to)F3001-F3008
JournalJournal of the Electrochemical Society
Volume163
Issue number11
DOIs
Publication statusPublished - 1 Jan 2016

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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