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Reduce the Decomposition Temperature of Pollutants


Recently, the Qingdao Institute of Bioenergy and Process of the Chinese Academy of Sciences has received good news. The research team of the Membrane Separation and Catalysis Research Group of the Institute has successfully developed a functional perovskite oxide porous membrane and energy-saving regeneration technology. Important scientific and technological achievements obtained from the development and study of its catalytic-membrane separation performance.


There are often biological pollutants such as algae in natural waters, as well as a wide variety of organic pollutants. During the solar-driven evaporation process, pollutants will be enriched and grown in the photothermal film, which will cause film pollution and cause the performance of the film material to decrease. High-temperature degradation can effectively remove biological and organic pollutants, and is an ideal means to achieve membrane regeneration. However, the thermal decomposition process of pollutants requires higher temperatures, which will cause huge energy consumption. And reducing the combustion decomposition temperature of pollutants can effectively reduce energy consumption, realize energy-saving regeneration of membrane materials, and promote the application of photothermal materials in actual water environments.


Researcher Jiang Heqing, director of the Membrane Separation and Catalysis Research Group at the Qingdao Institute of Bioenergy and Process Research, Chinese Academy of Sciences, proposed the use of cobalt-based perovskite's catalytic and photothermal properties to develop multifunctional perovskite oxide porous membranes. Under the guidance of this idea, associate researcher Wang Yuchao of the research group developed a porous film of La0.7Sr0.3CoO3 (LSCO) perovskite oxide. In tests using algae and melamine as pollutants, the LSCO porous membrane significantly reduced the combustion decomposition temperature of the pollutants attached to it, reduced the regeneration energy consumption of the porous membrane during the combustion process, and achieved the goal of energy saving and regeneration. Due to the high thermal stability of the LSCO porous membrane, the performance is not affected after multiple membrane regeneration cycles.


This work cleverly utilizes the photothermal and catalytic properties of perovskite oxides to solve the biological pollution problem of photothermal films in practical applications.


    
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