实现“制氢+硫磺”的双重资源化收益，我国硫化氢清洁处理技术获突破

Core Viewpoint - The breakthrough in hydrogen sulfide (H2S) decomposition technology offers a new pathway for the complete elimination and resource utilization of H2S, significantly benefiting ecological protection and enabling dual resource recovery of hydrogen and sulfur [1][2][3]. Group 1: Technology Development - The "off-site electrochemical full decomposition of hydrogen sulfide to hydrogen and sulfur technology" was developed by a team led by Academician Li Can from the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, after over 20 years of research [1]. - This technology has been evaluated by the China Petroleum and Chemical Industry Federation, with experts agreeing that it has reached an international leading level and recommending its scale-up and accelerated application [1]. - The technology effectively decouples chemical reactions and charge transfer, addressing engineering challenges such as sulfur precipitation on electrode surfaces and the impact of bubble adhesion on hydrogen evolution reactions [1]. Group 2: Industrial Application - The research team has partnered with enterprises to implement an industrial demonstration project in the coal chemical sector, featuring innovations in several areas, including high-efficiency electrochemical cells and systems, and high-purity hydrogen recovery technology [2]. - The project has established the world's first 100,000 cubic meters per year off-site electrochemical demonstration unit for H2S decomposition, utilizing H2S from a methanol plant with an annual capacity of 200,000 tons [2]. - The operational data indicates that the unit has run continuously for over 1,000 hours, achieving complete conversion of H2S (with H2S in exhaust <1 ppm) and producing sulfur with a purity of over 99.95% and hydrogen with a purity of over 99.999% [2]. Group 3: Market Potential - In China, approximately 8 billion cubic meters of H2S are processed annually, while globally, the annual processing volume exceeds 70 billion cubic meters, with a potential backlog of over 4 trillion cubic meters [2]. - The complete elimination and resource utilization of H2S have been longstanding challenges in the natural gas extraction, refining, and coal chemical industries [2].