Abstract：Cu-Al, Co-Al and Cu-Co-Al complex metal oxide catalysts were prepared by co-precipitation to investigate catalytic hydrolysis performance of HCN gas. The catalysts were characterized by XRD, BET, XPS and H2-TPR to explore the structure and properties of catalysts. The results indicated that the Cu-Co-Al catalyst showed the best catalytic activity. When the reaction was kept for 180min at 200℃, the Cu-Co-Al、Cu-Al and Co-Al catalysts showed 95%, 90% and 10% HCN conversion, respectively. The corresponding concentration of NH3 was 122, 118, 18mg/m3. The excellent low-temperature hydrolysis of HCN was ascribed to its low crystallinity, high dispersion and large specific surface area. Besides, the appropriate amount of surface oxygen, the high Cu2+ and Co3+ content and the excellent redox ability were responsible for the superior low-temperature catalytic hydrolysis performance of HCN on the Cu-Co-Al catalyst.
