Central South University

Huimin Yi

Hui Liu

Liyuan Chai

Zhang Lin

Xiaobo Min

Qingwei Wang

Qingzhu Li

Xudong Liu

Lin Wu

Haiying Wang

Weichun Yang

Kaisong Xiang

Fangfang Zhu

Fenghua Shen

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.

Method for preparing hydrogen sulfide from sulfur dioxide by electrochemical reduction

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Changsha, China

Huimin Yi