Catalysts play a vital role in the chemical industry. The Chinese scientific research team has developed a new catalyst (OXZEO bifunctional catalyst) in the field of direct conversion of coal-based syngas (a mixture of carbon monoxide and hydrogen) into low-carbon olefins, which makes the catalytic reaction more efficient and precise, and helps the coal chemical industry to develop more green and efficient. .
According to the Chinese Academy of Sciences, the research was completed by the research team of Pan Xiulian, Academician Bao Xinhe of the Dalian Institute of Chemical Physics of the Chinese Academy of Sciences, and the research team of the University of Science and Technology of China. The relevant results were published online on May 19 in the international academic journal "Science" published.
"Catalytic reactions are the conversion of raw materials (reactants) into products (target products) under the acceleration of a catalyst. We want as many reactants as possible to be converted (high conversion rate) and as precisely as possible It can be converted into the target product we need and reduce by-products (high selectivity)." Pan Xiulian introduced, however, in most cases, the conversion rate of the reactant and the selectivity of the target product often trade off. To achieve both high conversion rate and high selectivity has always been the direction of efforts of catalysis researchers.
According to reports, in 2016, Pan Xiulian, Bao Xin and the team successfully created the OXZEO catalytic system in the process of studying the direct conversion of coal-based syngas into low-carbon olefins, and achieved a carbon monoxide conversion rate of 17% for the first time in the world. The selectivity of low-carbon olefins is as high as 80%, which breaks through the theoretical limit of 58% selectivity of the classic Fischer-Tropsch technology route in this field, and has the advantages of low water consumption and low carbon emissions.
Since then, the research team has devoted themselves to research and continued to innovate, creating a new generation of OXZEO dual-function catalysts. Under the condition of maintaining the selectivity of low-carbon olefins greater than 80% (up to 83%), the single-pass conversion rate of carbon monoxide can reach up to 85% %, and achieved the best international level of low-carbon olefin yield of 48%.
"In the future, this technology will be further combined with green hydrogen prepared from renewable energy, and a new coal chemical system with low water consumption and low carbon emissions will be developed in my country, helping to ensure national energy, resource security and 'double carbon' 'The realization of the goal." Bao Xinhe said.
微信扫一扫打赏
