摘要
In order to remove nitric oxides （NO） from flue gas, experimental studies on the photocatalytic oxidation （PCO） of NO are carried out in an efficient laboratory-scale reactor. Nano-sized TiO2 particles loading on quartz sand are prepared and used as the photocatalyst. Effects of several key operating parameters on NO conversion are investigated, including operating temperature, NO inlet concentration, oxygen percentage, relative humidity and residence time. The results illustrate that the NO inlet concentration, the oxygen percentage and the relative humidity play an important role in the oxidation of NO. A lower NO inlet concentration and a higher oxygen percentage result in a higher NO conversion efficiency. When the relative humidity is 8%, the maximum value of NO conversion efficiency is achieved. In addition, the operating temperature and the residence time have a little effect on the conversion efficiency of NO.
为脱除烟气中的一氧化氮(NO),在小试实验装置上进行了光催化氧化(PCO)烟气中 NO 的实验研究. 制备出负载在石英砂上的纳米级 TiO2 颗粒作为光催化剂,通过试验分别考察了操作温度、NO 初始浓度、氧气含量、相对湿度、停留时间这 5 个重要因素对 NO 转化效率的影响. 研究结果表明,NO 初始浓度、氧气含量和相对湿度对 NO 的光催化氧化效率影响显著. NO 初始浓度越低、氧气含量越高时,NO 转化效率越高; 当烟气相对湿度为8%时,NO 转化效率达到最高. 此外,操作温度和停留时间对 NO 转化效率影响甚微.
基金
The National High Technology Research Program of China (863 Program) (No. 2008AA05Z303)
the Science and Technology Program of Jiangsu Province (No. BE2010184)
the Environmental Protection Scientific Research Subject of Jiangsu Province (No.201031)
