Abstract: CuZnAl catalyst samples prepared by the complete liquid-phase technology (CLT) ha d high stability for synthesis of dimethyl ether in a slurry-bed reactor. The i n vestigation focused on the effect of preparation methods on chemical states of C u a nd Zn species on catalyst surface by X-ray photoelectron spectroscopy. The form i ng surroundings of the catalyst would cause alteration in its surface structure and properties.

Key words: X-rayphotoelectron spectroscopy, mechanical mixing, sol-gel method, complete liquid-phase technology, copper, zinc, aluminum, composite oxide, dimethyl ether