利用鼓泡床反应器对NO2对中温干法脱硫反应的影响开展了实验研究.分别采用分析纯CaO和工业级石灰两种物质作为吸收剂,在250℃和350℃两个反应温度下研究NO2对吸收剂转化率的影响.结果表明,NO2的存在可以提高吸收剂转化率;250℃下NO2的作用显著高于350℃;250℃下NO2浓度的增加对吸收剂转化率基本没有影响;在350℃时,对于分析纯CaO,NO2浓度的增加降低了吸收剂转化率,这主要是由于SO2与NO2的竞争反应引起的;工业级石灰内含杂质较多,对一些反应有催化作用,因而其反应现象与分析纯CaO略有不同.
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