Promoting Effect of Ti Species in MnOx-FeOx/Silicalite-1 for the Low-Temperature NH3-SCR Reaction

Autor:	Rudi Duan, Lili Liu, Chen Yan, Chen Weibin, Gu Jialiang, Xidong Wang
Rok vydání:	2020
Předmět:	chemistry.chemical_element 02 engineering and technology lcsh:Chemical technology 010402 general chemistry 01 natural sciences Redox Catalysis lcsh:Chemistry Adsorption NH3-SCR silicalite-1 lcsh:TP1-1185 titanium Lewis acids and bases Physical and Theoretical Chemistry NOx denitration Chemistry Selective catalytic reduction 021001 nanoscience & nanotechnology 0104 chemical sciences lcsh:QD1-999 Chemical engineering 0210 nano-technology Titanium Space velocity
Zdroj:	Catalysts, Vol 10, Iss 566, p 566 (2020) Catalysts Volume 10 Issue 5
ISSN:	2073-4344
DOI:	10.3390/catal10050566
Popis:	Manganese and iron oxides catalysts supported on silicalite-1 and titanium silicalite-1 (TS-1) are synthesized by the wet impregnation method for the selective catalytic reduction (SCR) of NOx with NH3 (NH3-SCR), respectively. The optimized catalyst demonstrates an increased NOx conversion efficiency of 20% below 150 ° C, with a space velocity of 18,000 h&minus 1, which can be attributed to the incorporation of Ti species. The presence of Ti species enhances surface acidity and redox ability of the catalyst without changing the structure of supporter. Moreover, further researches based on in situ NH3 adsorption reveal that Lewis acid sites linked to Mn4+ on the surface have a huge influence on the improvement of denitration efficiency of the catalyst at low temperatures.
Databáze:	OpenAIRE
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