Shulou(Shulou.com)11/24 Report--

CTOnews.com, March 13, according to the website of the Chinese Academy of Sciences, hydrogen production technology is the source of the hydrogen energy industry and is very important to the overall layout and development of the hydrogen energy industry chain. The Institute of Engineering Thermophysics of the Chinese Academy of Sciences recently achieved for the first time a breakthrough in the principle of "net zero emission" hydrogen production from natural gas at 400 °C under mild conditions.

According to reports, through the orderly separation of hydrogen and CO2 products, the reaction temperature of hydrogen production from natural gas is reduced from the traditional 800-1000 °C to below 400 °C, more than 99% of methane is directly converted into high-purity hydrogen and high-purity CO2, and the complete coordination of hydrogen production and decarbonization based on fossil energy is realized. The energy consumption of hydrogen production and decarbonization has decreased by 20-40%. Based on this, combined with the commercial medium temperature trough focusing technology, this work realizes the hydrogen production and decarbonization of natural gas driven by solar energy, and further reduces the carbon footprint of hydrogen production from fossil energy. it shows the feasibility of realizing sustainable hydrogen energy utilization by complementary fossil energy and renewable energy. The decrease of reaction temperature makes it possible to combine industrial waste heat with hydrogen energy. So far, researchers have completed more than 6000 stable cycle experiments, verified the reliability of the method, and preliminarily demonstrated the broad prospect of technology transformation and application.

▲ principle of hydrogen production from natural gas with "net zero emission" under mild conditions | Source: the website of the Chinese Academy of Sciences CTOnews.com learned from the website of the Chinese Academy of Sciences that the work was completed by the Jin Hongguang team, academician of the Chinese Academy of Sciences and researcher of the Institute of Engineering Thermophysics, and was supported by the basic Science Center project "orderly conversion of Energy" by the National Natural Science Foundation of China. Centering on the main line of the science center project, researchers creatively put forward a new thermodynamic idea of "orderly separation of thermochemical multi-products coupled with improvement of medium and low temperature thermal energy grade". A series of important breakthroughs have been achieved in reducing reaction temperature, improving methane conversion and selectivity, trapping carbon dioxide with low energy consumption, miniaturization of equipment, etc. The related research results are published in Energy & Environmental Science.

Hao Yong, a researcher at the Institute of Engineering Thermophysics of the Chinese Academy of Sciences, said that the combination of natural gas and solar energy to produce "net zero emission" hydrogen energy shows that under the new situation of the vigorous development of low-carbon and renewable energy technology, the new model of low-carbon utilization of fossil energy in line with the characteristics of China's energy structure is of great significance for low-carbon power generation, industrial waste heat utilization and the absorption of renewable energy such as solar energy, wind energy and biomass biogas. Based on this result, it is studied that the mixed combustion of low carbon hydrogen and natural gas can effectively improve the power generation efficiency of thermal power plants and reduce carbon emissions; using natural gas as hydrogen energy carrier to realize hydrogen production on demand in hydrogenation stations is expected to reduce infrastructure investment and hydrogen production, storage and transportation costs, and realize centralized resource utilization of CO2. In addition, this achievement can realize the high value and low carbon utilization of industrial waste heat below 500 ℃. This study is expected to promote the decarbonization of energy structure, the promotion of the proportion of renewable energy and the accelerated development of renewable energy technology, and will provide new ideas for solving the bottleneck of hydrogen energy system, storage and transportation chain. At present, the team is working hard to promote the industrialization of this achievement, and the principle prototype of Nissan 100kg hydrogen is under development.

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