Removal of hydrogen sulfide from biogas by adsorption and photocatalysis: a review

Biogas is a renewable fuel produced from modern biomass, yet biogas contains traces of hydrogen sulfide, a toxic compound, that must be removed before biogas usage. Here we review the removal of hydrogen sulfide by biological treatment, chemical treatment, porous solid treatment and photocatalysis....

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Bibliographic Details
Published in:Environmental chemistry letters 2023-04, Vol.21 (2), p.1059-1073
Main Authors: Fonseca-Bermúdez, Óscar Javier, Giraldo, Liliana, Sierra-Ramírez, Rocío, Moreno-Piraján, Juan Carlos
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Analytical Chemistry
Biogas
Biological treatment
Carbon dioxide
Chemical treatment
Chemistry
Composite materials
Earth and Environmental Science
Ecotoxicology
Energy
Environment
Environmental Chemistry
Figure of merit
Gases
Geochemistry
Hydrogen
Hydrogen sulfide
Hydrogen sulphide
Life span
Mathematical analysis
Microorganisms
Molecular weight
Oxidation
Photocatalysis
Pollutants
Pollution
Removal
Renewable fuels
Reviewpaper
Sulphides
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Summary:Biogas is a renewable fuel produced from modern biomass, yet biogas contains traces of hydrogen sulfide, a toxic compound, that must be removed before biogas usage. Here we review the removal of hydrogen sulfide by biological treatment, chemical treatment, porous solid treatment and photocatalysis. Adsorption and photocatalysis methods are compared by figures of merit calculations. Adsorption is used commercially but is limited by the lifespan of adsorbent materials. Photocatalysis appears as an affordable alternative, and the combination of adsorption and photocatalysis is promising. The figure of merit calculation appears as a good indicator of the performance of adsorbent materials and photocatalysts.
ISSN:1610-3653
1610-3661
DOI:10.1007/s10311-022-01549-z