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Source: People's Republic of China in Russian – People's Republic of China in Russian –
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Source: People's Republic of China – State Council News
BEIJING, January 7 (Xinhua) — An industrial demonstration project aimed at producing hydrogen and sulfur by decomposing the highly toxic gas hydrogen sulfide (H2S) was inspected in Beijing on Tuesday. It offers an innovative path to green transformation for traditional industries such as natural gas production, petrochemicals, and coal chemicals.
The project will process 100,000 cubic meters of H2S per year. It was developed by a team led by Academician Li Can from the Dalian Institute of Chemical Physics of the Chinese Academy of Sciences (CAS). It is based on a technology that uses off-site electrocatalysis to completely decompose H2S into hydrogen and sulfur.
The project participants include Shandong Sunway Chemical Group Co., Ltd., the Yulin Institute of Clean Energy Innovation under the CSA, and Dalian Haoming Energy Technology Co., Ltd.
The H2S Emissions Problem
Global energy consumption remains dependent on natural gas, oil, and coal and faces environmental challenges associated with H2S emissions. This highly toxic compound can easily oxidize to sulfur dioxide, leading to acid rain and, consequently, environmental damage and serious health risks.
H2S is primarily generated as a byproduct or co-product of natural gas production, oil refining, and coal combustion. According to the China Sulfuric Acid Association, China requires the treatment of approximately 8 billion cubic meters of H2S annually, while the global total exceeds 70 billion cubic meters. The accumulated global volume of H2S is estimated at over 4 trillion cubic meters.
Given the widespread and hazardous nature of H2S, its complete elimination and disposal has always been a critical issue.
FROM LABORATORY TO FACTORY
Since 2003, Academician Li Can's team has been studying unconventional methods, such as using light and electricity to decompose H2S. Using innovative approaches, the team succeeded in producing sulfur and hydrogen in reactors spatially separated from the electrodes.
After more than 10 years of laboratory research, they succeeded in solving the problem of engineering scalability. More importantly, the innovative method fundamentally changed the reaction paradigm of traditional electrocatalytic systems, ensuring safety and reliability at the conceptual level.
The team then established collaboration with companies in the coal chemical industry to transfer the results from the laboratory to the plant for large-scale production.
GREEN TRANSFORMATION
The demonstration project utilizes H2S generated at the methanol plant of Henan Energy Chemical Group Co., Ltd. Operating data show that the H2S conversion rate at the plant exceeds 99.999%, and the purity of the sulfur and hydrogen products meets the highest commercial standards.
The team's technology offers a new way to completely eliminate and utilize hydrogen sulfide, providing both environmental and economic benefits.
If all 8 billion cubic meters of H2S that require processing annually were utilized using this technology using wind and solar energy, 730,000 tons of low-carbon hydrogen would be produced. -0-
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