Recently, the Chinese Academy of Sciences Dalian Institute of Chemical Physics, National Key Laboratory of Catalysis Basic Research Fellow, Academician Academician Li Can team developed a bimetallic solid solution oxide catalyst, to achieve the CO 2High selectivity and high stability of hydrogenation synthesis of methanol, the relevant research results published in Science Advances.
CO 2Of the emission reduction has attracted wide attention from the international community, the use of solar energy and other renewable energy, through photocatalysis, photoelectric catalysis or electrolysis of water hydrogen, the CO 2Hydrogenation of methanol and other fuels and chemicals, is to achieve CO 2Emission reduction and sustainable use of carbon resources the most viable strategy from the scientific understanding of the natural photosynthesis point of view, CO2 hydrogenation of methanol co-occlusion dark effect of photosynthesis, solar liquid fuel is an important way to the United States Southern California The Olah team of university professors has forward-looking the transformation of CO 2'Methanol economy' concept, Li Can team emphasizes the realization of CO based on renewable energy 2Of the use of carbon resources.Methanol is an important platform for chemical molecules from methanol can be made of olefins, aromatic hydrocarbons and other bulk chemicals and gasoline, diesel, can also be used directly as a fuel or fuel additives.Currently, the realization of CO 2The bottleneck of the industrialization of methanol to hydrogenation lies in the efficient hydrogen production from solar energy and renewable energy and the high selectivity and high activity of CO 2Hydrogenation to methanol catalytic technology development.
Li Can team is committed to solar photocatalysis, photoelectrocatalysis and hydrogen production of electrolytic water research, at the same time launched a CO 2+H2Research in order to achieve artificial solar synthesis solar fuel strategy 2+H2In the process, the selectivity to increase methanol is CO 2The biggest challenges in hydroconversion, such as the traditional Cu-based catalysts used in the synthesis of methanol to CO 2Hydrogenation of methanol, the outstanding problem is the low selectivity of methanol (50 ~ 60%) .In addition, the reaction of water will accelerate the deactivation of Cu-based catalyst.This work developed a different from the traditional metal catalyst bimetallic solid solution Oxide catalyst ZnO-ZrO 2, In CO 2The selectivity of methanol is still about 90% at the single pass conversion of more than 10%, which is the best comprehensive result in the same kind of studies at present. The results show that the solid solution structure of the catalyst provides a double active site - Zn And Zr, where H 2And CO 2Respectively, in the Zn bit and the atomic Zr sites adjacent activation, in CO 2Hydrogenation process showed synergy, which can generate methanol with high selectivity.In situ IR-MS isotope experiments and DFT theoretical calculations show that the surface HCOO * and H 3CO * is the main active intermediate species in the reaction 2Hydrogenation of methanol opened up a new way.
In addition, the catalyst reaction for 500 hours without any inactivation phenomenon, with excellent resistance to sintering stability and a certain ability to resist sulfur, showing a good industrial prospects.Chronic methanol synthesis of Cu-based catalyst requires low sulfur content of raw materials At 0.5ppm, and the sulfur resistance of the catalyst to reduce the cost of raw gas purification, industrial applications show a potential advantage of the above results have been declared four patents in China and the international PCT patent 1.
Research work has been the Chinese Academy of Sciences strategic pilot technology, the National Natural Science Foundation, Dalian Institute of Methanol conversion and coal and oil on behalf of the new technology research and post-doctoral fund funding.
