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Jermy, B.R.,Kim, S.Y.,Kim, D.K.,Park, D.W. Korean Society of Industrial and Engineering Chemi 2011 Journal of industrial and engineering chemistry Vol.17 No.1
Highly ordered three-dimensional V-SBA-16 materials were prepared at mild acidic condition by tuning the key parameters for metal substitution such as molar ratio of silica to 1-butanol (TEOS/BuOH), water to hydrochloric acid (H<SUB>2</SUB>O/HCl ratio) and hydrothermal aging time in the initial gel containing 0.0035 F127/0.01V/0.91-2.00 TEOS/2.08-0.76 BuOH/0.70-1.16 HCl/118.6-120.1 H<SUB>2</SUB>O. The extent of mesopore structural ordering was confirmed by small-angle X-ray scattering and nitrogen adsorption isotherms. The presence of incorporated vanadium in a highly dispersed tetrahedral state was confirmed by electron spin resonance (ESR) and Drs-UV spectroscopy. The NH<SUB>3</SUB>-TPD profile showed that the materials tend to posses medium-acidic V-OH sites; strong-acidic sites increased with decreasing Si/V ratios. TEM analysis shows that the cubic phase was stable up to 3.6wt.% vanadium loading. The activity of V-SBA-16 was tested for the selective oxidation of ethylbenzene to acetophenone by studying the effect of temperatures, time on stream, and the mole ratio of ethylbenzene to TBHP.
G. Tanimu,B.R. Jermy,S. Asaoka,S. Al-Khattaf 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.45 No.-
The effect of metal oxide species in (Ni, Fe and/or Co) oxide-Bi2O3 over gamma-alumina support wasinvestigated for n-butane oxidative dehydrogenation. Partial substitution of Ni up to 50% by Fe improvedbutadiene selectivity while same substitution with Co increased n-butane conversion. The ternary Ni-Fe-Co system (10 wt% Ni–5 wt% Fe–5 wt% Co–30 wt% Bi-O/gamma-Al2O3) showed the highest butadieneselectivity of 46.3% at n-butane conversion of 30%. The acid-base sites preferably adjusted by ternarymain metal combination in hierarchical cohabitation of metal (Ni, Fe and Co) oxide, Bi2O3 and gamma-Al2O3 cooperate to accelerate butadiene selectivity at both 1st and 2nd step dehydrogenations due to anincreased H2 abstraction and 1-butene intermediate adsorption.
Bineesh, K.V.,Kim, S.Y.,Jermy, B.R.,Park, D.W. Korean Society of Industrial and Engineering Chemi 2009 Journal of industrial and engineering chemistry Vol.15 No.2
A series of vanadia-doped titania pillared clay (V/Ti-PILC) with various amounts of vanadia were prepared and their performance for the selective catalytic oxidation of H<SUB>2</SUB>S was investigated in this study. V/Ti-PILCs were characterized using X-ray diffraction (XRD), BET apparatus, and X-ray photoelectron spectroscopy (XPS). V/Ti-PILCs showed better catalytic performance than as such Ti-PILC at temperatures ranging from 220 to 300<SUP>o</SUP>C without any considerable SO<SUB>2</SUB> emission. The H<SUB>2</SUB>S conversion over V/Ti-PILC increased with increasing vanadia content up to 5wt.%. This superior catalytic performance might be related to the uniform dispersion of vanadia in the form of monomeric and polymeric species. However, it decreased at 10wt.% vanadia loading due to the decrease of surface area and to the formation of crystalline V<SUB>2</SUB>O<SUB>5</SUB> phase. The presence of water vapor in the reactant mixture resulted in the decrease of the H<SUB>2</SUB>S conversion.