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AssigneeInstitut Francais du Petrole
InventorsFabrice Lecomte, Christian Streicher, Cesile Barrere-Tricca
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A method for processing a gas containing at least hydrogen sulfide (H2S) and at least sulfur dioxide (SO2), includes the steps of contacting the gas with a liquid solvent containing at least one catalyst in a contacting stage, recovering gaseous effluent substantially containing no hydrogen sulfide and no sulfur dioxide from the contacting stage, and separating liquid sulfur from liquid solvent in a decantation zone downstream of the contacting stage. In order to remove by-products resulting from degradation of the catalyst, a liquid fraction F containing at least solvent, catalyst, sulfur and the solid by-products resulting from degradation of the catalyst is extracted from after the contacting stage. The liquid fraction F is sent to a processing stage distinct from the contacting stage where the liquid fraction F is heated to a temperature at least partially crystallizing the by-products, and the at least partially crystallized by-products separated from the rest of the liquid fraction F containing at least solvent. At least a stream F1 comprising solvent, catalyst and sulfur and substantially free of the by-products and a stream F2 mostly comprising the by-products are recovered.
A device to remove and recover by-products formed during processing of a gaseous effluent containing at least hydrogen sulfide (H2S) and sulfur dioxide (SO2), wherein an organic solvent and at least one catalyst are used, said device comprising at least one contactor reactor, at least one decantation zone, several lines for delivery of at least a gas to be processed, of a fluid comprising at least solvent and catalyst, several lines for extraction of at least a cleaned gas and of a fluid F containing at least solvent, catalyst, sulfur and by-products, at least a processing zone for processing said fluid F comprising at least solvent, catalyst, sulfur and by-products, said processing zone comprising heating means suited to favour crystallization of the by-products and separation means suited to separate the by-products from the rest of said fluid comprising at least solvent, catalyst and sulfur, and at least a fluid F1 containing mainly solvent, catalyst and sulfur and nearly free of by-products and a fluid F2 comprising most of the by-products are recovered at the outlet of said processing zone.
Dependencies are inferred from the claim text.