Fe-Mn/H-BEA催化剂上甲烷催化还原NOx的动力学研究
Kinetics of NOx Reduction by CH4 on Fe-Mn/H-Beta Catalyst
DOI: 10.12677/HJCET.2020.103019, PDF,    科研立项经费支持
作者: 谭淑宁, 潘 华*, 赵子龙, 王 莉：浙江树人大学，生物与环境工程学院，浙江 杭州
关键词: 催化脱硝；动力学参数；反应机理；Fe-Mn/H-BEA；DeNOx Catalysis； Kinetic Parameters； Reaction Mechanism； Fe-Mn/H-Beta
摘要: Fe-Mn/H-BEA催化剂上甲烷催化还原NOx的动力学研究表明，脱硝催化反应为NOx的拟一级反应，在350℃和400℃时，脱硝反应速率的NO反应级数分别为0.91和0.95。O2的反应级数为0.21~0.31，当温度范围在300℃至450℃时，脱硝催化反应与甲烷和二氧化碳的浓度无关，即主要以NOx催化分解为主。NO氧化是催化反应的限速步骤。Fe-Mn/H-BEA催化剂上甲烷催化还原NOx反应包括2个途径：一个是NOx的催化分解(主反应)，另一个是甲烷催化还原NOx(CH4-SCR)。
Abstract: Kinetic of catalytic reduction of NOx with methane over Fe-Mn/H-BEA catalyst reveals that the catalytic reaction is first order and 0.21 - 0.31 order with respect to NOx and oxygen, respec-tively. At 350˚C and 400˚C, the NO reaction order of de-NOx rate is 0.91 and 0.95, respectively. The catalytic reaction is almost independent to the presence of methane and CO2 at tempera-tures ranging from 300˚C to 450˚C. It means that catalytic decomposition of NOx is the dominant reaction. NO oxidation is the rate-limiting step. DeNOx catalysis by methane over Fe-Mn/H-beta comprises two reactions: one is catalytic decomposition of NOx (the dominant reaction), and the other is NOx reduction by methane (CH4-SCR).
文章引用：谭淑宁, 潘华, 赵子龙, 王莉. Fe-Mn/H-BEA催化剂上甲烷催化还原NOx的动力学研究[J]. 化学工程与技术, 2020, 10(3): 138-145. https://doi.org/10.12677/HJCET.2020.103019

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