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Direct Decomposition of NOx over TiO2 Supported Transition Metal Oxides at Low Temperatures
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-11-28 , DOI: 10.1021/acs.iecr.8b03532
Devaiah Damma 1 , Thirupathi Boningari 1 , Padmanabha R. Ettireddy 1, 2 , Benjaram M. Reddy 3 , Panagiotis G. Smirniotis 1
Affiliation  

TiO2 supported transition metal oxides were investigated for the direct decomposition of nitrogen oxides (NOx) at lower temperatures. The results showed that the catalytic performance strongly depends on the kind of transition metal oxide deposited on the TiO2. Among the various catalysts examined, Mn/TiO2 and Co/TiO2 exhibited relatively high NOx conversion at lower temperatures in the presence of 3 vol % O2. The oxygen in the reaction stream had a positive impact on the NOx decomposition over the Mn/TiO2 catalyst. We have not observed any TiO2 phase conversion from anatase to rutile in the Mn/TiO2 during the NOx decomposition reaction at different temperatures (100–350 °C). NOx decomposition activity was shown to be governed by the surface labile oxygen rather than the gas phase oxygen. The Mn/TiO2 catalyst exhibited a good resistance to 10 vol % H2O and 100 ppm of SO2.

中文翻译:

低温下TiO 2负载的过渡金属氧化物上NO x的直接分解

研究了TiO 2负载的过渡金属氧化物在较低温度下对氮氧化物(NO x)的直接分解。结果表明,催化性能很大程度上取决于沉积在TiO 2上的过渡金属氧化物的种类。在所研究的各种催化剂中,Mn / TiO 2和Co / TiO 2在3vol%O 2的存在下在较低温度下表现出较高的NO x转化率。所述反应物流中的氧气对所述NO产生积极影响X比的Mn /分解的TiO 2催化剂。我们还没有观察到任何TiO 2在不同温度(100–350°C)下,NO x分解反应过程中,Mn / TiO 2中的锐钛矿相转变为金红石相。已显示NO x分解活性由表面不稳定的氧气而不是气相氧气控制。Mn / TiO 2催化剂显示出对10vol%的H 2 O和100ppm的SO 2的良好耐受性。
更新日期:2018-11-28
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