are dehydrogenation to give α-methyl styrene over Lewis acid sites and dealkylation to give benzene, ethylbenzene and propene over Brønsted acid sites [ 10 ]. In this article, we report new solid acid catalysts prepared by incorporating tungsten oxide
improve [ 18 ], [ 20 ]. According to the literature there is no research that examined the effect of using Tungsten oxide WO 3 /Syltherm 800 nanofluid as a heating fluid flow inside the receiver of PTC. So this article aimed at examining the ability of
Authors:E. Horváth, P. L. Neumann, A. L. Tóth, É. Vázsonyi, A. A. Koós, Z. E. Horváth, P. Fürjes, C. Dücső, and L. P. Biró
The deposition of
nanowires for interconnects in nanoelectronic devices werestudied
morphologically by scanning electron microscopy (SEM), atomic force microscopy
(AFM) and by in-situ resistance measurements. The deposition and basic
characterization of nanometer size tungsten wires by gas injection (GIS) and
focused ion beams (FIB) was carried out in-situ in a LEO 1540 XB workstation.
The I(V) measurement showed that the deposited W wires have ohmic
characteristic. The variation of the resistance during an ex-situ heating was
linear with a low thermal coefficient (4% of the pure metallic W).
Authors:Jingyun Sheng, Xiaodong Yi, Feng Li, and Weiping Fang
Nano Ni–W catalysts with different tungsten contents prepared by mixing alkaline nickel carbonate with ammonium tungstate
show high activity and good sulfur tolerance for hydrogenation of thiophene-containing ethylbenzene. The catalysts were characterized
by XRD, TPR, SEM, Raman and BET. The results show that the activity of the catalysts for ethylbenzene hydrogenation is affected
profoundly by W loading and the best result was obtained on catalyst with W/Ni ratio equal to 0.16. The increase of activity
of the catalyst can be attributed to the interaction between Ni and W doped and the increase of the surface area of the catalyst.
samples depends on the type of tungsten precursor (WCl 6 > (NH 4 ) 6 H 2 W 12 O 40 > H 2 WO 4 ) [ 18 ]. Here we present the photocatalytic degradation of Malachite Green (MG) with composite thin films TiO 2 /WO 3 . Since 1933 [ 19 ], the MG dye
established. However, there are few reports on a direct conversion of bio-ethanol into propylene.
The authors [ 6 ] reported that lanthanum and tungsten modified H-ZSM-5 reduced aromatization and olefin hydrogenation and, as a result, the propylene
for reusing. So it is necessary to study the stability of the heteropolyanion on zirconia as well as the leaching of HPA from the support in order to reuse the catalyst. HPA can be quantitatively characterized by the heteropoly blue (Tungsten blue