Partial oxidation of surrogate Jet-A fuel over SiO2 supported MoO2

Abstract

A SiO 2-supported MoO 2 nanoparticle catalyst was synthesized by a sol-gel method and tested as catalytic material for the partial oxidation of n-dodecane. MoO 2 nanoparticles supported on SiO 2 are < 10 nm in size and show a resistance to sintering at 850 o C, which is a typical reforming temperature for ndodecane. The formation of MoO -Si bonds at the interface between MoO 2 nanoparticles and SiO 2 support appear to be directly related to the enhanced stability to sintering displayed by the nanoparticles. As a result of this particle size stabilization, SiO 2 supported MoO 2 nanoparticles show an improved reforming activity in terms of syngas generation compared to micron-size commercial MoO 2. Thus, commercial MoO 2 exhibits a good initial activity at space velocities up to 15 h-1 , but showing only gas-phase reactions at larger values. Conversely, MoO 2 nanoparticles supported on SiO 2 show a high initial reforming activity (e.g., 69% H 2 yield, 82% CO yield and 100% carbon conversion) even at space velocities up to 30 h-1. Supported MoO 2 nanoparticles also show good stability for the partial oxidation of n-dodecane at 850 o C without any sign of deactivation during the first 24 h on-stream. 10 mol% MoO 2-SiO 2 CO Yield H 2 Yield Conversion MoO 2 10 mol% MoO 2-SiO 2 at WHSV 30 h-1

Waste Balanites aegyptiaca seed oil as a potential source for biodiesel production in the presence of a novel mixed metallic oxide catalyst

“…Peaks appearing at 26°, 37° and 53° are conventional peaks for MoO 2. 39,40 Moreover, when pristine MoO 2 is modified by another metal oxide, the crystallinity of parent material is not altered as it can be observed from diffraction patterns. By the addition of BaO, two peaks start appearing in patterns as shown in Figure 1 at 27° and 32°.…”

“…The composition of produced biodiesel gas chromatographymass spectroscopy (GC-MS) by Perkin Elmer was used fixed with DB-Wax column. The sample amount of 1 μL was injected with helium as carrier gas ( 39,40 Moreover, when pristine MoO 2 is modified by another metal oxide, the crystallinity of parent material is not altered as it can be observed from diffraction patterns. By the addition of BaO, two peaks start appearing in patterns as shown in Figure 1 at 27 and 32 .…”