Titania pillared montmorillonite from Indonesian montmorillonite by using titanium isopropoxide as precursor was successfully prepared. Physico-chemical character of material by using x-ray diffraction, gas sorption analyzer, diffuse reflectance UV-Visible, scanning electron microscope (SEM) and energy dispersive x-ray (EDAX) showed the dipersion of titania in dominantly anatase phase that is t...

<p style='text-indent:20px;'>A depletion-type reaction-diffusion Gierer-Meinhardt model with Langmuir-Hinshelwood reaction scheme and the homogeneous Neumann boundary conditions is introduced investigated in this paper. Firstly, boundedness of positive solution parabolic system given, constant steady state solutions are exhibited by Shengjin formulas. Through rigorous theoretical analysis...

The kinetic of Fischer-Tropsch synthesis over a co-precipitated Fe-Ce catalyst was investigated in a fixed bed micro reactor. Experimental conditions were varied as follow: reaction pressure 1-15bar, H¬¬¬2/CO feed ratio of 1-3 and space velocity of 3600-5400 h-1 at the temperature range of 270-310°C. 4 models according to the Langmuir-Hinshelwood-Hougen-Watson (LHHW) type rate equation were der...

The kinetics of the simultaneous syntheses ethyl tert-butyl ether (ETBE) and butyl (BTBE) over Amberlyst™ 35 (A35) has been studied at 315–353 K in liquid phase. Different kinetic modeling approaches—namely, empirical power-law modeling, mechanistic based on Langmuir-Hinshelwood-Hougen-Watson (LHHW) Eley-Rideal (ER) formalisms, information-based modeling—have compared. Empirical equations yield...

Glycerol hydrogenolysis represents one of the most promising technologies for future bio-refineries. In this context, kinetic modeling provides key quantitative assessment significance various reactions process development. However, as present, there are only limited studies on detailed glycerol conversion to 1,2-propanediol, ethylene glycol and other alcoholic products. work, a comprehensive s...

acetylene dose due to the high supply of hydrogen. Moreover, methane should not be formed, since there should not be any dissociation of acetylene on the surface. Figure 11 shows the result of an experiment in which the surface was precovered with a monolayer of hydrogen. The first dose of acetylene (0.2 X 1015 molecules of C2H2 cm-2) leads to an enormous increase in the hydrogen pressure and t...

The degradation of an azo dye, Acid Black 1 (AB 1) with ZnO as photocatalyst using natural solar light in aqueous solution has been investigated under different conditions. The degradation is more with solar/ZnO process than with solar/TiO2-P25 process at pH 9. The influence of operational parameters such as the amount of photocatalyst, dye concentration and initial pH on photodegradation by Zn...

The ubiquity of oleic acid (OA) renders it a poster child for laboratory investigations of environmental oxidation chemistry. In the current study, mechanistic details of the oxidation of OA by hydroxyl radicals at the air-water interface are investigated using field-induced droplet ionization mass spectrometry (FIDI-MS). Products from OH oxidation of both unsaturated and saturated carbon atoms...

A series of different M/TiO2 catalysts are prepared, where M = Au, Pt, Pd and Ag, with a 0.2 wt% loading, tested for activity as photocatalysts the water gas shift reaction, WGSR, using continuous flow, phase reactor. For both thermal (dark) photocatalytic (UV irradiated) WGSR best catalyst/photocatalyst is Au/TiO2. The kinetics studied function reactor temperature, Au loading concentrations CO...

Monodispersed Pd-nanoparticles (∼ 8 nm) prepared via a modified microemulsion method were deposited on active carbon fibers (ACF) fabrics and studied in a semi-batch 1-hexyne liquid-phase hydrogenation. The catalyst Pd(0.45 wt%)/ACF demonstrated > 96% selectivity to 1-hexene up to 90% of conversion. Initial activity at 303 K, 1.3 MPa pressure, in n-heptane as a solvent was 0.14 kmolH2 kg −1 Pd ...