RUDN University researchers design new way to synthesize catalysts for ethanol

In Russia, RUDN University chemists proposed a new way to synthesize catalysts for the conversion of ethyl alcohol. The obtained materials are promising catalysts for the selective conversion of ethanol, which is an important stage in the development of an alternative technology for obtaining valuable chemical synthesis products based on plant raw materials. The results of the study are published in Catalysis Today.

RUDN chemists combined two approaches to improve the efficiency of catalysts for acetaldehyde synthesis. First, they combined oxides of several metals in nanocomposites: aluminium, cerium, and zirconium. The researchers synthesized five types of powders with different oxides ratios. Five of them was prepared at a relatively low temperature of 180°C, and another five was heated to 950°C. This made it possible to form different structures in the materials. The calcined samples had a large diameter and pore volume.

The second idea was to add copper. All the powders were soaked in an aqueous solution of copper nitrate, dried at room temperature, and exposed to a flow of hydrogen at 400°C. After that, the finished catalysts were tested in the ethanol vapor dehydrogenation reaction. Chemists placed them in a thin layer on a porous filter, and then fed alcohol vapors in the helium flow. The reaction was carried out at temperatures from 240°C to 360°C.