Premium
Chemoadsorption for Separation of Hydrogen Sulfide from Biogas with Iron Hydroxide and Sulfur Recovery
Author(s) -
Lincke Marc,
Petasch Uwe,
Gaitzsch Uwe,
Tillmann Andreas,
Tietze Michael,
Niebling Falko
Publication year - 2020
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.202000032
Subject(s) - hydrogen sulfide , biogas , sulfur , adsorption , flue gas desulfurization , chemistry , carbon fibers , hydroxide , sulfide , waste management , hydrogen , inorganic chemistry , materials science , chemical engineering , organic chemistry , composite number , engineering , composite material
Hydrogen sulfide (H 2 S) removal from biogas is essential to allow biogas storage in the natural gas grid. Several established methods exist, most of them making use of non‐reusable substrates such as iron sponge or active carbon. Coated metallic foams provide a reusable sustainable alternative. Several iron oxides and hydroxides were tested to validate the H 2 S adsorption properties before and after thermal regeneration, i.e., sulfur removal. Amorphous iron hydroxide proved to efficiently clean biogas after maximum four sulfur removal cycles and showed an almost ten times larger capacity for sulfur adsorption than crystalline hematite Fe 2 O 3 . Very low H 2 S contents could be realized until breakthrough.