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Sb-Containing Metal Oxide Catalysts for the Selective Catalytic Reduction of NOx with NH3

التفاصيل البيبلوغرافية
العنوان: Sb-Containing Metal Oxide Catalysts for the Selective Catalytic Reduction of NOx with NH3
المؤلفون: Qian Xu, Dandan Liu, Chuchu Wang, Wangcheng Zhan, Yanglong Guo, Yun Guo, Li Wang, Qingping Ke, Minh Ngoc Ha
المصدر: Catalysts, Vol 10, Iss 10, p 1154 (2020)
بيانات النشر: MDPI AG, 2020.
سنة النشر: 2020
المجموعة: LCC:Chemical technology
LCC:Chemistry
مصطلحات موضوعية: SbCeZr, NH3-SCR, active sites, mechanism, Chemical technology, TP1-1185, Chemistry, QD1-999
الوصف: Sb-containing catalysts (SbZrOx (SbZr), SbCeOx (SbCe), SbCeZrOx (SbCeZr)) were prepared by citric acid method and investigated for the selective catalytic reduction (SCR) of NOx with NH3 (NH3-SCR). SbCeZr outperformed SbZr and SbCe and exhibited the highest activity with 80% NO conversion in the temperature window of 202–422 °C. Meanwhile, it also had good thermal stability and resistance against H2O and SO2. Various characterization methods, such as XRD, XPS, H2-TPR, NH3-TPD, and in situ diffuse reflectance infrared Fourier transform (DRIFT), were applied to understand their different behavior in NOx removal. The presence of Sb in the metal oxides led to the difference in acid distribution and redox property, which closely related with the NH3 adsorption and NO oxidation. Brønsted acid and Lewis acid were evenly distributed on SbCe, while Brønsted acid dominated on SbCeZr. Compared with Brønsted acid, Lewis acid was slightly active in NH3-SCR. The competition between NH3 adsorption and NO oxidation was dependent on SbOx and metal oxides, which were found on SbCe while not on SbCeZr.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 2073-4344
Relation: https://www.mdpi.com/2073-4344/10/10/1154; https://doaj.org/toc/2073-4344
DOI: 10.3390/catal10101154
URL الوصول: https://doaj.org/article/ac9c543989c54a3fa7528e9036e1c74d
رقم الأكسشن: edsdoj.9c543989c54a3fa7528e9036e1c74d
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:20734344
DOI:10.3390/catal10101154