负载型氧化锌脱硫剂脱硫性能的改善

摘要

单一氧化锌负载型脱硫剂脱硫精度可达到0.1×10-6,但其硫容量相对较低.采用共浸渍法制备ZnO-MnO2/γ-Al2O3负载型H2S脱硫剂,通过XRD和BET等手段研究了MnO2对脱硫剂物相及比表面积的影响.并在固定床反应器中考察了Zn/Mn摩尔比、负载量、烧结温度和脱硫温度对脱硫性能的影响.结果表明,活性组分锌锰摩尔比为8∶1,负载量为20％的脱硫剂有较好的脱硫性能,脱硫精度小于0.1×10-6的同时,最高硫容量可达19.08 g S/100 g(ZnO-MnO2).MnO2的加入可以明显改善氧化锌负载型脱硫剂的脱硫性能.%As for the single zinc oxide loading type desulfurizer, desulfurization accuracy can reach 0. 1 X 10-6, but its sulfur capacity is relatively lower. In this study, the supported ZnO MnO2/y-Al2O3 sorbents were prepared by the impregnation method. The effect of MnO2 additive on phase, texture and specific surface area of Zn based sorbents were investigated by XRD and BET, respectively. The desulfurization performance was studied from Zn: Mn loading, sintering temperature and sulfidation temperature in a fixed bed reactor. The results revealed that H2S could be removed from 65 X 10~6 to less than 0.1×1CT6 and the largest sulfur content was 19. 08 g S/ 100 g (ZnOMn02) by the sorbent with 8: 1 mole ratio of Zn:Mn and 20% loading. The additive MnO2 phase can obviously enhanced the properties of single zinc oxide loading desulfurizer.