Low-temperature direct electrochemical splitting of H2S

Frontiers in Chemical Engineering

Chemical Engineering

Martin Velazquez-Rizo¹  Adrian Cesar Cavazos Sepulveda² 

[1] Electrical and Computer Engineering Program, Computer, Electrical and Mathematical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia;Exploration and Petroleum Engineering Center-Advanced Research Center (EXPEC ARC), Saudi Aramco, Dhahran, Saudi Arabia;

关键词: hydrogen sulfide;    electrolysis;    H generation;    sulfur generation;    ionic liquids;   

DOI  :  10.3389/fceng.2022.1087435

 received in 2022-11-02, accepted in 2022-12-19,  发布年份 2023

来源: Frontiers

【 摘 要 】

Hydrogen is considered one of the most promising decarbonized fuels. However, its applicability is limited due to the ecological constraints of its production. Hydrogen sulfide (H2S) is widely available in oil and gas reservoirs and has the potential of becoming an energetically favorable source of hydrogen. Nevertheless, its electrochemical separation into H2 and elemental sulfur has not been successfully achieved at the industrial scale, due to sulfur poisoning of the electrodes at the sulfur oxidation half-reaction. This review highlights the progress of the direct electrolytic separation of H2S below the sulfur dew point, where the sulfur poisoning effect becomes more prominent. The article discusses the different technologies and approaches explored to improve the energy efficiency and stability of H2S electrolytic systems, including the recent use of nanostructured electrodes and novel sulfur solvents as electrolytes.

【 授权许可】

Unknown   
Copyright © 2023 Velazquez-Rizo and Cavazos Sepulveda.