... used for removal of H2S in pipeline gas, water gas, semi-water gas, coke oven gas, methane(biogas). Desulfurizer, ... used for removal of H2S in pipeline gas, water gas, semi-water gas, coke oven gas, methane(biogas).Advantages: ... Volume: 6-8% per time;3), Intensity & Water Resistance: this desulfurizer would not become mudding after boiling it ... very hot star --Ferric oxide Desulfurizer - coal based