研究论文丙烯选择催化还原NO 的研究.pdf

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第 54 卷第 2 期化工学报 Vol 54 №2
2003 年 2 月 Journal of Chemical Industry and Engineering (China) February 2003
研究论文丙烯选择催化还原 NO 的研究
周黎明陈光文王树东吴迪镛
(中国科学院大连化学物理研究所,辽宁大连 116023)
摘要在以蜂窝陶瓷为载体的 Pt/ Al2O3 催化剂上,对采用丙烯选择催化还原方法来脱除稀燃发动机尾气中 NO
的反应进行了实验与理论研究建立了一维非均相反应模型对反应过程进行了模拟从实验与理论两方面讨论了
. 1 , , 1
反应温度、反应物浓度、通道特征尺度等因素的影响;并对反应过程中的内、外扩散作用作了理论分析.
关键词选择催化还原丙烯一维非均相模型扩散
中图分类号 TQ 032 41 文献标识码 A 文章编号 0438 - 1157(2003) 02 - 0199 - 05
SELECTIVE CATALYTIC REDUCTION OF
NITRO GEN OXIDE BY PROPYLENE
ZHOU Liming ,CHEN Guangwen ,WANG Shudong and WU Diyong
( Dalian Institute of Chemical Physics , Chinese Academy of Sciences , Dalian 116023 , L iaoning , China)
Abstract The reaction of selective catalytic reduction ( SCR) of nitrogen oxide (NO) in lean burning engine
exhaust with propylene was studied on Pt/γ Al2O3 supported by monolith b A one dimensional
heterogeneous model was set up to simulate the process behavior of reactions , and the effects of factors , such as
reaction temperature , reactant concentration , dimension of channel of monolith catalyst , were discussed in detail
both by experiment and theory The results predicted by the model were tested through experiments With this
model , the effects of inter and intra phase diffusion and other factors are discussed The model shows that the
NO conversion rate will rise when highe