Removal of sulfur contaminants from biogas to enable direct catalytic methanation

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

  • Christian Dannesboe
  • ,
  • John Bøgild Hansen, Haldor Topsøe A/S, Denmark
  • Ib Johannsen

In the near future, renewable energy sources will replace fossil energy. To allow full carbon utilization of renewable biomass, we have demonstrated a possible integration between a biogas reactor, an electrolysis unit, and a catalytic methanation reactor. Stringent removal of all sulfur contaminants in raw biogas is required to enable this integration. We demonstrate how existing bulk sulfur removal solutions, like a biotrickling filter loaded with Acidithiobacillus thiooxidans and impregnated activated carbon, are unable to meet this requirement. Only the main sulfur contaminant hydrogen sulfide (H 2S) can effectively be removed. Contaminants carbon disulfide (CS 2), dimethyl sulfide (DMS), and carbonyl sulfide (COS) will leak through the carbon filter, long before hydrogen sulfide can be detected. Utilization of surplus oxygen from the combined system is proven problem free and allows sulfur removal without introducing contaminants. Provided that a recommended sulfur guard is included, the proposed design is ready for full-scale implementation.

Original languageEnglish
JournalBiomass Conversion and Biorefinery
Number of pages12
ISSN2190-6823
DOIs
Publication statusE-pub ahead of print - 3 Dec 2019

See relations at Aarhus University Citationformats

Download statistics

No data available

ID: 174381358