The Li Can team of the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, has made new progress in the catalytic hydrogenation of CO2 to produce light olefins: the direct conversion of CO2 to low-carbon olefins in a tandem catalyst system. The use of clean energy to convert H2 and CO2 hydrogenation directly to lower olefins is an important way to recycle greenhouse gas CO2. Low-carbon olefins (ethylene, propylene, butylene) are the most important and basic chemical raw materials for the synthesis of organic materials, while the traditional synthesis methods are mainly the cracking of naphtha and the preparation of coal by methanol, all of which depend on fossil resources (oil And coal). Therefore, the use of CO2 to convert into low-carbon olefins with high added value can not only achieve the utilization of CO2 carbon resources, but also play a role in emission reduction CO2, which has important strategic significance. However, since CO2 is a relatively inert molecule in terms of thermodynamics, it is difficult and challenging to achieve CO2 activation and highly selective conversion. In this study, Li Can's team constructed a ZnZrO solid solution oxide/Zn modified SAPO molecular sieve series catalyst. The catalyst (ZnZrO/SAPO) under the reaction conditions close to industrial production, the selectivity of lower alkenes in hydrocarbons can reach 80-90%, and has good stability and resistance to sulfur poisoning. In the aspect of tandem catalyst system construction, Li Can's team found that CO2 hydrogenation on ZnZrO solid solution oxides can selectively synthesize methanol (this result was published in Science Advances, the paper is linked), based on which ZnZrO solid solution oxides In series with the SAPO catalyst, direct hydrogenation of CO2 to lower olefins can be achieved. Infrared spectroscopy and isotope experiments show that CO2 and H2 are activated on the ZnZrO solid solution oxide to form CHxO intermediate species, and the intermediate species migrates from the ZnZrO surface to the molecular sieve pores, thereby completing the formation of carbon-carbon bonds. The synergy between the tandem catalysts and the surface migration of the key intermediate species CHxO allows the thermodynamic and kinetic coupling of CO2 hydrogenation directly to lower olefins to be achieved. This study has also opened up new ideas for the conversion of CO2, and has also opened up new ways for the synthesis of light olefins. Related research results have been published on ACS Catalysis. This project was supported by the Chinese Academy of Sciences' strategic pilot technology project, the National Natural Science Foundation of China, the Dalian Institute of Technology's methanol conversion and coal-oil substitute new technology basic research project, and the postdoctoral fellowship fund. Sanitary Handle Accessories,Bathroom Faucet Handle Accessories,Bathroom Mixers Handle Accessories FOSHAN SHAMANDA SANITARY WARE CO., LTD , https://www.shamandahome.com