Ethanol Transformation over Cu-Containing Zirconium Phosphate
The study of structure, phase composition and catalytic properties of Cu-containing zirconium phosphate and zirconium phosphate was carried out in ethanol transformation both in the presence and in the absence of oxygen. Catalysts were characterized by XRD, HRTEM, TPR and TGA. High-temperature treatment of Cu-containing zirconium phosphate led to formation of Cu0 particles with sizes in the range from 2 nm to ~1 μm. Ethanol conversion reached 100% for both samples. The absence of oxygen in the feed gas favored for dehydrogenation of ethanol to form acetaldehyde over Cu-containing zirconium phosphate: acetaldehyde yield was 75%. Dense distribution of copper particles on the surface of zirconium phosphate prevented formation of dehydration products. Zirconium phosphate demonstrated typical acidic activity to yield ethylene and diethyl ether in the absence of oxygen. Acetaldehyde yield about 40 % was reached for zirconium phosphate in oxygen-containing atmosphere.