Photocatalytic decolorization of Methyl Orange (MO) solution has been studied using phosphotungstic acid (HPA) as photocatalyst. The decolorization reaction of MO solution is photocatalysis. The paper reveals that the optimal loading of photocatalyst for decolorization of MO solution (10 mg/L) is 0.6 g/L. The results show that the photocatalytic decolorization reaction of MO with HPA in a h...

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...

Among the different photocatalysts, TiO 2 ( E g = 3.1 eV, zero charge point (pHpzc 6.3), and surface 55 m /g) is currently most efficient studied semiconductor due to its strong photocatalytic activity, non-toxicity, chemical stability. The elimination of DR-80 on by adsorption in batch mode application heterogeneous photocatalysis onto under UV irradiation. effects contact time (0–60 min), ini...

A kinetic study of elemental mercury (Hg(0)) oxidation reaction over molybdenum (Mo)-promoted vanadium (V)-based selective catalytic reduction (SCR) catalyst was carried out. To probe the role HCl and O2 in Hg(0) catalyst, a real-time experiment conducted. It found that adsorption negligible adsorbed onto surface could show consistent performances presence at realistic SCR temperatures. NH3 sho...

Kinetic modeling is an important issue, whose objective is the accurate determination of the rates of various reactions taking place in a reacting system. This issue is a pivotal element in the process design and development particularly for novel processes which are based on reactions taking place between various types of species. The Fischer Tropsch (FT) reactions have been used as the ki...

ZnO- nanoparticles with an average particle size of 24 nm were successfully synthesized using the microwave assisted sol- gel technique. Structural and morphological properties of the nanoparticles were characterized by X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), Energy disperse spectrum (EDS) and Fourier transform infrared spectroscopy (FTIR). The band gap ene...

Residue curve maps are a powerful tool for the preliminary design of Reactive Distillation (RD). In this study, residue curve maps of the n-butyl acetate synthesis reaction were calculated based on the Langmuir–Hinshelwood–Hougen–Watson kinetic and UNIQUAC models to calculate the physical properties of the system. The results showed that the unstable node branch emerged from the n-butyl ace...

Catalytic ketonization of carboxylic acids is promising for the synthesis renewable products. Despite its potential, fatty acid and kinetics in liquid phase are less investigated. This work encompasses kinetic evaluation two TiO2 catalysts (anatase rutile) C-C coupling C12-C18 inert dodecane solvent. The rutile catalyst, with higher Lewis density, showed intrinsic activity more favorable activa...

Novel CrZrOx catalysts were designed and synthesized by the co-precipitation method first time used for selective catalytic reduction of NOx with NH3 (NH3-SCR). The promotional effect ZrO2 on Cr2O3 was investigated. SCR performance significantly enhanced appropriate addition in CrZrOx, owing to formation solid solution structure Cr-O-Zr conjunction bonds. Among tested catalysts, catalyst Cr:Zr ...

Nonelectrochemical hydrogen peroxide direct synthesis (HPDS) under ambient conditions is an environmentally benign and energy-efficient process that produces a green oxidizer, yet the reaction mechanism of HPDS still controversial. Inspired by recently suggested heterolytic involves electron proton transfer at Pd catalysts, we propose new electrochemical density functional theory (DFT) model co...