公开(公告)号：US20220316078A1

公开(公告)日：2022-10-06

申请号：US17707903

申请日：2022-03-29

申请人： CENTRAL SOUTH UNIVERSITY

发明人： Hui LIU ,  Kaisong XIANG ,  Liyuan CHAI ,  Fenghua SHEN ,  Xudong LIU ,  Fangfang ZHU ,  Lin WU ,  Huimin YI ,  Xiaobo MIN ,  Zhang LIN ,  Qingzhu LI ,  Qingwei WANG ,  Haiying WANG ,  Weichun YANG

IPC分类号： C25B9/23 ,  C25B1/01 ,  C25B1/50 ,  C25B11/052 ,  C25B11/057 ,  C25B11/081 ,  C25B11/075 ,  C25B15/08 ,  B01D53/50 ,  B01D53/78

摘要： A method for preparing hydrogen sulfide from sulfur dioxide by electrochemical reduction includes electrochemically reducing sulfur dioxide absorbed in an aqueous solution into gaseous hydrogen sulfide with a membrane electrode, resulting in efficient and selective conversion of the sulfur dioxide absorbed in the aqueous solution into the hydrogen sulfide to avoid a deactivation of a cathode due to colloidal sulfur produced on the cathode and adhesion onto a surface of the cathode, wherein the method is carried out at ambient temperature and normal pressure without addition of a reducing agent, having no waste salts produced, and is simple in operation, and is convenient for large-scale application.