采用化学吸附剂进行干法脱硫,已成为目前工业上最重要的脱硫手段之一,而高温条件下的脱硫技术耗能较高,在室温环境下,材料脱硫性能也有所下降.本文利用天然凹凸棒为载体,采用共沉淀法制备了纳米ZnO/凹凸棒,分别在150、250、350、450、550℃下焙烧,并进行了XRD、SEM、N2吸附等表征.研究了其室温下对SO2的去除效果,考察了焙烧温度对纳米ZnO/凹凸棒的影响.结果表明,负载纳米ZnO后提高了凹凸棒对SO2的去除能力,250℃下焙烧得到的样品具有最高的脱硫性能.%Desulfuration by dry process with chemosorbent has become one of the most important methods in industrial desulfurization. High temperature desulfurization requires high energy consumption, while at room temperature desulfurizing agent suffers declined performance. In this study nano-sized ZnO/attapulgite compounds were prepared by co-precipitation using natural attapulgite as a carrier, and calcination at 150℃, 250℃, 350℃, 450℃, 550℃, and were characterized with powder X-ray diffraction, scanning electron microscopy and nitrogen adsorption. The samples were used for SO2 removal at room temperature, and the effect of calcination temperature on desulfurizing performance was studied. The result showed that loading of nano-sized ZnO improved the desulfurizing performance of attapulgite. The nano-sized ZnO/attapulgite calcined at 250℃ had the highest capacity. It suggested that the nano-sized ZnO/attapulgite compounds were effective in removing SO2 from indoor air at room temperature.
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