Kang, Min Choi, Jinsoon Kim, Yong Tae Park, Eun Duck Shin, Chee Burm Suh, Dong Jin Yie, Jae Eui 2024-01-20T21:32:47Z 2024-01-20T21:32:47Z 2021-09-01 2009-05 0256-1115 https://pubs.kist.re.kr/handle/201004/132548 A series of V2O5-TiO2 aerogel catalysts were prepared by the sol-gel method with subsequent supercritical drying with CO2. The main variables in the sol-gel method were the amounts of V2O5 and when the vanadium precursor was introduced. V2O5-TiO2 xerogel and V2O5/TiO2 (P-25) were also prepared for comparison. The V2O5-TiO2 aerogel catalysts showed much higher surface areas and total pore volumes than V2O5-TiO2 xerogel and impregnated V2O5/TiO2 (P-25) catalysts. The catalysts were characterized by N-2 physisorption, X-ray diffraction (XRD), FT-Raman spectroscopy, temperature-programmed reduction with H-2 (H-2-TPR), and temperature-programmed desorption of ammonia (NH3-TPD). The selective catalytic reduction of NOx with ammonia in the presence of excess O-2 was studied over these catalysts. Among various V2O5-TiO2 catalysts, V2O5 supported on aerogel TiO2 showed a wide temperature window exhibiting high NOx conversions. This superior catalytic activity is closely related to the large amounts of strong acidic sites as well as the surface vanadium species with characteristics such as easy reducibility and monomeric and polymeric vanadia surface species. English KOREAN INST CHEM ENGINEERS+ MORPHOLOGICAL PROPERTIES TITANIA AEROGELS AMMONIA BEHAVIOR OXIDE Effects of preparation methods for V2O5-TiO2 aerogel catalysts on the selective catalytic reduction of NO with NH3 Article 10.1007/s11814-009-0148-0 1 KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.26, no.3, pp.884 - 889 KOREAN JOURNAL OF CHEMICAL ENGINEERING 26 3 884 889 scie scopus kci ART001340083 000266250000047 Chemistry, Multidisciplinary Engineering, Chemical Chemistry Engineering Article MORPHOLOGICAL PROPERTIES TITANIA AEROGELS AMMONIA BEHAVIOR OXIDE Selective Catalytic Reduction NOx V2O5-TiO2 NH3 Aerogel Catalyst