...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Catalysis science & technology >Effects of reaction temperature on the photocatalytic activity of photo-SCR of NO with NH3 over a TiO2 photocatalyst
【24h】

Effects of reaction temperature on the photocatalytic activity of photo-SCR of NO with NH3 over a TiO2 photocatalyst

机译：反应温度对NH3光催化剂的光催化活性在TIO2光催化剂上的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Effects of reaction temperature on the activity of photo-assisted selective catalytic reduction (photo-SCR) of NO with NH3 were investigated under very high GHSV conditions (100000 h~(-1)). The reaction temperature had a significant effect on the photo-SCR activity over a TiO2 photocatalyst. Maximum NO conversion was achieved at 433 K (NO conversion = 84%, N2 selectivity = 100%). The apparent activation energies in the low and high temperature range were evaluated to be 9.0 kJ mol~(-1) (353-433 K) and -2.7 kJ mol~(-1) (493-593 K), respectively. Kinetic analysis revealed that the rate-determining step in the photo-SCR was decomposition of NH2NO intermediates in all the ranges of the reaction temperature (353-593 K). The reaction temperature affects not only the rate constant of decomposition of NH2NO intermediates but also the total number of active sites ([S]0) and the equilibrium constant of NH3 adsorption, resulting in the dynamic change in the reaction rate.
机译：在非常高的GHSV条件下（100000 H〜（-1））研究了反应温度对NH3的光辅助选择性催化还原（照片-SCR）活性的影响。 反应温度对TIO2光催化剂的光SCR活性具有显着影响。 在433 K时最大无法实现转换（无转化= 84％，N2选择性= 100％）。 低温和高温范围内的明显激活能评估为9.0 kJ mol〜（-1）（353-433 K）和-2.7 kJ mol〜（-1）（-1）（493-593 K）。 动力学分析表明，光SCR中的速率确定步骤是反应温度所有范围（353-593 K）中NH2NO中间体的分解。 反应温度不仅影响NH2NO中间体的分解速率常数，还影响活性位点的总数（[S] 0）和NH3吸附的平衡常数，从而导致反应速率的动态变化。

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号