Russia - fuel and energy complex

One-stage catalytic technologies for H2S removal from gas streams 

Problem Justification and Background

SOURCES OF HYDROGEN SULFIDE:

·        Sulfuric natural gases - H₂S content up to 30% vol.

·        Refinery gases - H₂S content up to 95 % vol.

·        Oil-assosiated gases - H₂S content up to 6 % vol.

·        Coke oven gases - H₂S content up to 1% vol.

·        Biogas - H₂S content up to 1% vol.

HYDROGEN SULFIDE EMITTED UPON:

·        Oil and gas field exploring

·        Oil and gas well drilling

·        Oil and gas transportation

·        Oil, gas and biomass processing

·        Coal coking

Advantages:
The process is well studied and widely implemented in industry.

Disadvantages:

·        The process is multistageous and complex

·        Deactivation of the catalyst due to coke formation or sulfidation

·        Need additional technological processes of tail gas purification

·        Emissions of toxic secondary side products such as COS, CS2, sulfuric acid, carbon monoxide, nitrogen oxides.

State-of-the-art

·        One catalytic reactor allows attaining H₂S conversion of up to 98%

·        "Soft" reaction conditions (T=220-280^oC) allow oxidation of H₂S in the composition of hydrocarbon containing gases.

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