公开(公告)号：US12129566B2

公开(公告)日：2024-10-29

申请号：US17707903

申请日：2022-03-29

Applicant: CENTRAL SOUTH UNIVERSITY

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

CPC classification number: C25B9/23 ,  B01D53/502 ,  B01D53/78 ,  C25B1/01 ,  C25B1/50 ,  C25B11/052 ,  C25B11/057 ,  C25B11/075 ,  C25B11/081 ,  C25B15/08 ,  B01D2251/306 ,  B01D2251/604

Abstract: 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.

公开(公告)号：US11866803B2

公开(公告)日：2024-01-09

申请号：US18072329

申请日：2022-11-30

Applicant: Central South University

Inventor： Liyuan Chai ,  Qingwei Wang ,  Xiaobo Min ,  Qingzhu Li ,  Meiqing Shi

IPC: C22B26/00 ,  C22B26/22 ,  C22B1/02

CPC classification number: C22B26/22 ,  C22B1/02

Abstract: The invention provides a complete set of treatment system and method for deep utilization of dolomite resources. The system includes a primary calcination device, a carbon dioxide capture device, a digestion device, a carbonization separation device, a pyrolysis device and a secondary calcination device; the primary calcination device includes a dolomite calciner, a plurality of hoardings and an exhaust pipe, and an exhaust chamber is formed between the hoardings, the top of the dolomite calciner and the outer wall of the blanking bin; the exhaust chamber is in communication with the carbon dioxide capture device through the exhaust pipe; the carbonization separation device includes a carbonization reaction tank whose gas inlet is in communication with the gas outlet of the carbon dioxide capture device; and the pyrolysis device includes a pyrolysis kettle and a vacuum pump which maintains a negative pressure state in the pyrolysis kettle.