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Comparative Study of NO Oxidation under a Low O3/NO Molar Ratio Using 15% Mn/TiO2, 15% Co/TiO2, and 15% Mn–Co(2:1)/TiO2 Catalysts
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-01-14 , DOI: 10.1021/acs.iecr.9b05002
Meng Si 1 , Boxiong Shen 1 , Haohao Zhang 1 , Lijun Liu 1 , Wenjun Zhou 1 , Zhi Liu 1 , Yijun Pan 1 , Xiao Zhang 1
Affiliation  

NO catalytic oxidation using 15% Mn/TiO2, 15% Co/TiO2, and 15% Mn–Co(2:1)/TiO2 with a low molar ratio of O3/NO was investigated. O3 improved NO catalytic oxidation performance, including the tolerance to H2O and SO2. Synergism occurred more clearly between 15% Mn–Co(2:1)/TiO2 and O3 (O3/NO = 0.5) than between the other two catalysts and O3, below 250 °C. In situ diffuse reflectance infrared Fourier-transform spectroscopy indicated that O3 accelerated the mass production of monodentate nitrates on 15% Mn–Co(2:1)/TiO2 compared with 15% Mn/TiO2. Catalyst characterization results illustrated that cobalt-loading created lots of oxygen vacancies on 15% Mn–Co(2:1)/TiO2, promoting redox capability and enhancing NO catalytic oxidation. In addition, 15% Mn–Co(2:1)/TiO2 contained more Mn2O3, Mn3+, Mn4+, and chemisorbed oxygen on its surface than 15% Mn/TiO2 and 15% Co/TiO2, which could promote the synergistic effect of the catalyst. This study could reduce the consumption of ozone and reduce the harm of ozone leakage in NO oxidation, which could guarantee a high efficiency of NO oxidation in a wide temperature range (50–400 °C).

中文翻译:

低o在NO氧化的比较研究3使用15%的Mn /氧化钛/ NO摩尔比2,15%的Co /的TiO 2 /二氧化钛:,和15%Mn-Co共(1 2)2的催化剂

使用15%的Mn /氧化钛NO催化氧化2,15%的Co /的TiO 2,和15%Mn-Co共(2:1)/的TiO 2与的O-低摩尔比3 / NO进行了研究。O 3改善了NO催化氧化性能,包括对H 2 O和SO 2的耐受性。低于250°C时,在15%Mn–Co(2:1)/ TiO 2和O 3(O 3 / NO = 0.5)之间比在其他两种催化剂和O 3之间更明显地发生了协同作用。原位漫反射红外傅里叶变换光谱表明,O 3加速了15%Mn-Co(2:1)/ TiO 2上单齿硝酸盐的大量生产与15%的Mn / TiO 2相比。催化剂的表征结果表明,钴负载可在15%Mn-Co(2:1)/ TiO 2上产生大量氧空位,从而促进氧化还原能力并增强NO催化氧化。此外,与15%Mn / TiO 2和15%Co / TiO相比,15%Mn–Co(2:1)/ TiO 2在其表面上包含更多的Mn 2 O 3,Mn 3+,Mn 4+和化学吸附的氧。2个,可以促进催化剂的协同作用。这项研究可以减少臭氧消耗并减少臭氧泄漏对NO氧化的危害,从而可以确保在宽温度范围(50-400°C)下实现NO氧化的高效率。
更新日期:2020-01-15
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