Abstract First‐principles computations are performed to investigate the catalytic oxidation of CO on a Ti‐decorated Cr 2 TiC O MXene monolayer, through comprehensive analysis charge transfer, electronic density states, and difference interacting systems. By comparing reaction energy barriers, it is found that, rather than traditional Langmuir–Hinshelwood, Eley–Rideal, Mars‐van Krevelen (MvK) me...

Hierarchical BEA zeolite was prepared through desilication or followed by acid treatment. The catalytic performance of samples evaluated using Friedel-Crafts acylations with two substrates different molecular sizes, furan (5.7 Å) and benzofuran (6.9 Å), in the presence acetic anhydride as acylating agent. application simplified Langmuir-Hinshelwood kinetic model showed that size substrate leads...

the photocatalytic degradation of betamethasone sodium phosphate was investigated in aqueoussuspensions of zinc oxide nanoparticular with diameter size 20 nm under a variety of conditions.different parameters such as irradiation time, the amount catalyst (0.12-0.8 g lh), initialconcentration of drug (10-50 mgljand initial ph values (ranging from 3 to ii) were investigatedin the presence of vari...

hydrothermal synthesis of nickel-chitosan hybrid  has  been accomplished using ni(ch3coo)2,4h2o, chitosan and water as starting material, template and solvent respectively, followed by calcination at 800 and 900˚c to provide nanoporous nio800  and nio900. the solid products were characterized by x-ray diffraction (xrd), nitrogen adsorption-desorption, scanning electron microscopy (sem) and four...

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 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...