公开(公告)号：US20250154005A1

公开(公告)日：2025-05-15

申请号：US18837364

申请日：2023-02-20

Applicant: Topsoe A/S

Inventor： Samuel Wiktor Scherman JOHANSSON ,  Morten THELLEFSEN ,  Michael Thomas SYLVEST-JOHANSEN

IPC: C01B17/79 ,  C01B17/50 ,  C01B17/80 ,  C02F1/20 ,  C02F101/10 ,  C02F103/10 ,  C02F103/16 ,  C02F103/28 ,  C02F103/34

Abstract: The present disclosure relates to a process for purification of an aqueous solution comprising hydrogen sulfide comprising the steps of a. directing an amount of recycle gas to contact the aqueous solution comprising hydrogen sulfide, to separate a gas comprising hydrogen sulfide from the aqueous solution, b. heating said gas comprising hydrogen sulfide optionally after addition of a source of oxygen to provide a process feed gas, c. in a hydrogen sulfide oxidation step directing said process feed gas to oxidation of hydrogen sulfide to sulfur dioxide, d. in a sulfur dioxide oxidation step directing said sulfur dioxide rich gas to contact a material catalytically active in oxidation of sulfur dioxide to sulfur trioxide, to provide a sulfur trioxide rich gas e. in a condensation step cooling said sulfur trioxide rich gas, to enable hydration of sulfur trioxide and condensation of sulfuric acid to provide a stream of concentration sulfuric acid and a purified process gas, and in a recycling step, directing at least a part of the purified process gas as said recycle gas.