The kinetics of photocatalytic degradation aniline, 2-chloroaniline, and 2,6-dichloroaniline in the presence halloysite-TiO2 halloysite-Fe2O3 nanocomposites, halloysite containing naturally dispersed TiO2, Fe2O3, commercial P25, ?-Fe2O3 photocatalysts, were investigated with two approaches: Langmuir–Hinshelwood first-order equations. Adsorption equilibrium constants adsorption enthalpies, photo...

The role of Cu species in ion-exchanged IM-5 zeolite (Cu-IM-5) regarding the performance selective catalytic reduction (SCR) NOx with NH3 (NH3-SCR) and reaction mechanism was studied. Based on H2 temperature-programmed (H2-TPR) electron paramagnetic resonance (EPR) results, Cu–O–Cu isolated are suggested as main existing Cu-IM-5 active for SCR reaction. show a good NH3-SCR activity at temperatu...

Cost and performance-effective materials used in advanced oxidation processes such as photocatalysis have obtained widespread attention recent years. In this study, thermal spraying was a one-step method to obtain thick visible-light-active photocatalyst coatings on two types of substrates, namely, plain carbon steel copper. A mixed metallic titanium–silicon powder bearing 10% wt. Si feedstock....

Currently, Euro 5 (no more than 10 ppm sulfur content) and 6 (less diesel motor fuels are produced worldwide. High-quality by removing compounds using a hydrodesulfurization process. This article is devoted to the study of fuel containing 120 in presence an Al-Ni-Mo-O catalyst with 98% purification rate. According Langmuir–Hinshelwood–Panchenkov theory, kinetic model process developed calculati...

The kinetics of the transformation metallic Fe to active carbide phase at start Fischer–Tropsch (FT) reaction were studied. diffusion rates C atoms going in or out lattice determined using 13C-labeled synthesis gas combination with measurements transient 12C and 13C contents by temperature-programmed hydrogenation. In initial 20 min, diffuses rapidly into occupying thermodynamically very stable...

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...

In this paper, Ag/ZnO/HZSM-5ternary nanocomposites with different Ag loadings were prepared by the photo precipitation method. The prepared photocatalysts were characterized by XRD, BET, SEM and TEM. The photocatalytic activity of ZnO/HZSM-5 for 4-nitrophenol (4-NP) degradation was increased by silver doping. Effects of various parameters such as the initial concentration of 4-NP, pH and Ag loa...

photoreactor using solar radiation. The effect of various parameters such as pH, initial concentration of pollutant, catalyst dose, oxidant, and time variation were studied. The determination of the best catalyst was studied amongst the four catalysts (TiO2, ZnO, PSA and SSA) .The kinetics of degradation of isooctane was also studied. The results showed that TiO2 was the best catalyst with a de...

On the basis of experimental data a kinetic model for the heterogeneous interaction between alkylperoxyradicals and organic compounds in Langmuir- Hinshelwood approach at room temperature has been offered.The effect of oxygen on the kinetics of process in the presence, [O2]o = 1 x 1011 – 1.6 x 1012 molecules.cm-2, and absence of oxygen has been analyzed. Over time the chain degenerate branching...