锌基复合脱硫剂脱硫性能的研究

The reactivity of Zn-Cu-Mn and ZCM composite oxides prepared respectively by Co-precipitation and mechanically mixing method were investigated and compared with that of ZnO, CuO and MnO2 . Composition and structure of desulfurizer were studied by using XRD, and the sulfur compound in gas was analyzed by using FPD(flame photometric detector). The experimental results show that Zn-Cu-Mn desulfurizer possesses higher sulfidation reactivity in the temperature range of 250℃～350℃, and the optimum sulfidation temperature is 300℃. The desulfurizer has higher breakthrough sulfur capcity at the space velocity of 7799h-1. It is found that the reactivity of Zn-Cu-Mn desulfurizer is higher than that of pure ZnO when the samples are calcined at 400℃. With the calcination temperature increasing, surface area and reactivity of Zn-Cu-Mn desulfurizer reduce gradually, at the same time, spinel CuMn2O4 appears. Compared with the reactivity of Zn-Cu-Mn desulfurizer and ZnO, the reactivity of ZCM desulfurizer is lower. When the ZCM desulfurizer is calcined at about 550℃, MnO2 is reduced to Mn2O3. But the Mn2O3 will disappear and CuMn2O4 will appear when the ZCM desulfurizer is calcined at 750℃.