Catalytic Desulfurization System

A system that removes hydrogen sulfide in gas through a chemical catalytic reaction without removing moisture even at high relative humidity through a desulfurization catalyst (CATALITE), a catalyst containing iron oxide.


Catalytic Desulfurization System

Iron oxide(Fe2O3)catalyst

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Desulfurization Catalyst Reaction Mechanism

Iron oxide(Fe2O3)

3CO2 + 3H2S + H2O + 3O2 2CO2 + H2SO4 + 2S + H2CO3(CO32- + 2H+) + 2H2O

Schematic diagram of biogas production facility
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Anaerobic digestion

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Gas storage

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Air injection

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Desulfurization catalyst process to remove hydrogen sulfide

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Heat exchange dehumidifier

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Gas Engine Power Boiler

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Hydrogen Sulfide(H2S) Desulfurization Catalyst Test I
Hydrogen sulfide table 1
Item Unit CATALITE® Remarks
Dilution drainage 3,000 wt% 30 or more Catalytic reaction experiment result criteria

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Experimental Conditions
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H2S = 1,600 ~ 1,800 ppm

Flow rate : 50ml/min

O2 = 1 ~ 2% , O2

Space Velocity = 50 hr-1

Humidity : RH 100%

Contact time = 72 sec

Bed volume : 100ml (Capa. : 36g(60ml))

Hydrogen Sulfide(H2S) Desulfurization Catalyst Test II
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Hydrogen sulfide removal efficiency by desulfurization catalyst

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Desulfurization catalyst removal efficiency by oxygen inflow concentration

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Detection of H2S less than 1ppm as a result of checking the detector tube

Biogas pretreatment site test results
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Byeolnae Food Waste Clean Center

Sewage treatment capacity : 275,000m3/day

Biogas generation: 8,000m3/day

· Hydrogen sulfide(H2S) : 5,000 ppm or more

Siloxane : around 50 ㎎/m3

Hydrogen Sulfide(H2S) Desulfurization Catalyst Test III
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Biogas Application: Production of biogas using boilers and incineration

Concentration of processed gas : 10 ppm or less of hydrogen sulfide

Sampling location : 1 front and 1 rear of test bed respectively

Conditions for field testing : 15L/min, Average hydrogen sulfide concentration (approximately 5,000 ppm), operating time (720 hr)

Air injection : 500 ml/min, inflow composition(CH4 60%/CO2 30%/H2S 0.5%/H2O 5%/O2 1%)

Goal : Hydrogen sulfide removal rate of 99% or higher (at 99.5% or higher)