摘要
为了提高干法烟气脱硫反应的速率并改良脱硫产物,提出了一种基于自由基链式反应同步氧化烟气中NO和SO2的方法。对该方法的机理进行了分析,提出了利用添加剂引发烟气中链式反应的设想。分别选用双氧水、碳氢化合物、硝酸作为添加剂开展了实验研究。实验结果表明:利用链式反应同步氧化烟气中的NO和SO2是可行的。添加剂的选取很关键:双氧水和碳氢化合物由于自身消耗OH自由基,不能维持链式反应的进行;硝酸热解可有效地提供OH自由基,实现NO和SO2的同步氧化。优化反应条件有助于提高NO和SO2的氧化率。
A method was developed to simultaneously oxidize NO and SO2 through radical chain reactions to improve dry flue gas desulfurization technique. The mechanism was analyzed and adding additives was suggested to initiate the chain reactions in the flue gas. Peroxide, hydrocarbons, and nitric acid were tested as additives by experiments, respectively. The results show that NO and SO2 can be simultaneously oxidized in flue gas by the chain reactions with appropriate additives. Peroxide and the hydrocarbons fail to sustain the chain reactions due to their own consumption of OH radicals. Nitric acid efficiently provides OH radicals to promote the simultaneous oxidation of NO and SO2. Optimization of the reaction conditions favors the oxidation of NO and SO2.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2004年第11期1548-1550,共3页
Journal of Tsinghua University(Science and Technology)
关键词
氧化
烟气脱硫
一氧化氮
二氧化硫
链式反应
oxidation
flue gas desulfurization
nitrogen monoxide
sulfur dioxide
chain reactions
