Solid oxide fuel cell operation with biomass gasification product gases: Performance- and carbon deposition risk evaluation via a CFD modelling approach

Gernot Pongratz*, Vanja Subotić, Christoph Hochenauer, Robert Scharler, Andrés Anca-Couce

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Solid oxide fuel cell (SOFC) models used in the past for biomass-to-power plant simulations are limited in their predictability of the carbon deposition risk. In this work, industrial-relevant cell designs were modeled in 2D-CFD considering detailed reaction kinetics which allowed more accurate performance simulations and carbon deposition risk assessments. Via a parametric study, the influence of varying cell operating conditions on the cell performance and carbon deposition risk was quantified when utilizing product gases from steam- and air gasification with varying steam addition. Considering the results from this parameter study and carbon deposition risk assessment, recommendations for promising gasifier-SOFC configurations and cell operating points for stable long-term operation are presented. For smaller-scale biomass-to-power systems, the utilization of product gas from air gasification in anode supported cells with Ni/zirconia-based anode can be recommended, with only moderate steam dilution of the product gas at 750°C cell operating temperature. For larger scales, steam gasification might be meaningful, offering a generally higher electrical efficiency and power output in fuel cells than air gasification. However, a higher risk for carbon deposition could be determined in comparison to air gasification. Hence, a cell temperature of 850°C besides the use of cells with Ni/ceria-based anodes is recommended.

Original languageEnglish
Article number123085
JournalEnergy
Volume244
DOIs
Publication statusPublished - Apr 2022

Keywords

  • Biomass gasification
  • Carbon deposition
  • CFD Modelling
  • Combined heat and power
  • Solid oxide fuel cell

ASJC Scopus subject areas

  • Mechanical Engineering
  • Pollution
  • Energy Engineering and Power Technology
  • Energy(all)
  • Electrical and Electronic Engineering
  • Industrial and Manufacturing Engineering
  • Management, Monitoring, Policy and Law
  • Building and Construction
  • Fuel Technology
  • Renewable Energy, Sustainability and the Environment
  • Civil and Structural Engineering
  • Modelling and Simulation

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