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Producing desulfurized natural gas, comprises performing adsorption of sulfur by reacting metal sulfide and hydrogen sulfide to obtain metal disulfide and hydrogen, and regenerating metal sulfide by heating metal disulfide
Producing desulfurized natural gas, comprises performing adsorption of sulfur by reacting metal sulfide and hydrogen sulfide to obtain metal disulfide and hydrogen, and regenerating metal sulfide by heating metal disulfide
The method comprises, utilizing an amines scrubbing unit (A1), producing a desulfurized natural gas without carbon dioxide (CO 2) (11) at first and a concentrated gas effluent (3) comprising CO 2and H 2S, introducing effluent into a hydrogen sulfide (H 2S) collection unit using a solid adsorbent in a form of a metal sulfide (MeS) for performing adsorption of sulfur by reacting the MeS and H 2S to obtain metal disulfide (MeS 2) and hydrogen, and entering to a methanation unit (M1) that allows collection of CO 2and formation of an additional hot methane flow (7). The method comprises, utilizing an amines scrubbing unit (A1), producing a desulfurized natural gas without carbon dioxide (CO 2) (11) at first and a concentrated gas effluent (3) comprising CO 2and H 2S, introducing effluent into a hydrogen sulfide (H 2S) collection unit using a solid adsorbent in a form of a metal sulfide (MeS) for performing adsorption of sulfur by reacting the MeS and H 2S to obtain metal disulfide (MeS 2) and hydrogen, entering to a methanation unit (M1) that allows collection of CO 2and formation of an additional hot methane flow (7) that is obtained by transferring calories of the methanation unit to a regeneration zone of an H 2S adsorption unit using solid absorbent to obtain methane flow for allowing the regeneration of MeS by heating the MeS 2to obtain the MeS and gaseous sulfur, where the methane flow is used for setting a temperature of the gas effluent after heating at a temperature of 250-350[deg] C, introducing hot methane flow the H 2S collecting unit, and mixing the methane flow with the desulfurized natural gas output from the amines scrubbing unit to deliver desulfurized natural gas. The regeneration phase of the solid adsorbent implemented in the adsorption unit is operated at a temperature of 200-300[deg] C. A molar relationship of hydrogen/CO 2of the effluent of the adsorption unit is 4-4.2. The regeneration zone of the H 2S adsorption unit comprises an exchanger in which the methane hot flow is circulated inside tubes and MeS 2to be regenerated is located inside a grill. A methanation reactor has an annular form, and functions in a radial bed such that a flow runs out from a periphery of the methanation reactor to a central collector.
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