Study of hydrolysis carbonyl sulfide over mixed oxides from hydrotalcite-like compounds
类水滑石衍生复合氧化物催化水解羰基硫的研究

The orthogonal experiment design was employed to investigate the parameters of mixed oxides catalysts derived from a series of hydrotalcite-like compounds preparation through the coprecipitation method.The effects of metal combination,pH value,M2+/M3+,the ratio of divalent metal,calcination temperature,temperature of hydrothermal treatment on capacity of sulfur though hydrolysis COS were investigated.The results indicated that metal combination,the ratio of divalent metal and calcination temperature had notable effect on catalytic activity(p=99%),and temperature of hydrothermal treatment had effect on catalytic activity(p=95%),while pH value and M2+/M3+ had no notable effect(p=90%).The catalysts prepared under following conditions exhibited superior catalytic activity: metal combination Co-Ni-Al,pH value of 9,M2+/M3+ of 3,divalent metal ratio of 1,calcination temperature of 350℃,hydrothermal treatment temperature of 50℃.Moreover,the catalyst under the optimized conditions of preparation was characterized by repetitive experiment and XRD.The results indicated that the sulphur capacity of the catalyst reached 7.10 g sulfur/g catalyst and the Co3O4 may be active center.