Biogas Sulphur Removal in the process of Hydrogen Generation from Biogas
The anaerobic digestion process of residual biomass from various sources – animal waste, sewage treatment plants, industrial wastewater and landfills, for example – produces biogas, a mixture of methane and carbon dioxide.
Hydrogen sulfide (H2S) methane (CH4) reformation (H2SMR) (2H2S + CH4 = CS2 + 4H2) is a potentially viable process for the removal of H2S from sour natural gas resources or other methane containing gases. Unlike steam methane reformation that generates carbon dioxide as a by-product, H2SMR produces carbon disulfide (CS2), a liquid under ambient temperature and pressure—a commodity chemical that is also a feedstock for the synthesis of sulfuric acid. It is also evident that to prevent solid carbon formation, low inlet CH4 to H2S ratios are needed.
The industry utilizes a hydrogen sulfide scavenger system targets traces of H2S within gas streams and removes harmful odors (wet scrubbing for the removal of Sulphur). The industry requires an alternate solution for Sulphur removal.
For more details, contact DST-TEC team of Panjab University. [LC&SS]
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