Catalytic hydrogenation of CO2 to methanol has gained considerable interest for its significant role in utilization using heterogeneous catalysts. This study is the first propose a kinetic model based on Langmuir-Hinshelwood-Hougen-Watson (LHHW) mechanism over highly effective indium oxide (In2O3) catalyst. The work focuses different reaction conditions mainly revolving around variation operati...

This research focuses on deducing the kinetic mechanism for biodiesel production catalyzed by a CaO nanocatalyst derived from waste cockle shells via thermal hydration–dehydration treatment. In addition, preparation method hydration–dehydration-related parameters (hydration duration, recalcination temperature, and duration) was studied optimized. The transesterification reaction followed Langmu...

One of the current problems in environmental catalysis is design an effective and less costly catalytic system for oxidation CO. The nano-sized α-Mn2O3 oxide has been prepared modified with 0.5 wt.% Pt. catalysts have characterized by X-ray diffraction (XRD), photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), temperature-programmed reduction (TPR) diffuse-reflectance infr...

We report a new method to measure the kinetic rate constant of CO2 hydration using electrochemical oxidation carbon monoxide (CO oxidation) in isotope-labeled electrolyte. CO is often used as model reaction investigate surface metallic electrocatalysts, most notably stripping experiments. Using chip-based electrochemistry mass spectrometry with 18O-labeled electrolyte we show that: 1) For exper...

A well-known observation in the Fe-catalyzed Fischer-Tropsch (FT) reaction is that Fe-carbide catalysts deactivate due to carbon deposition. In comparison, influence of such deposits on product distribution has been less widely reported. The present work investigates relationship between kinetics FT for a carburized Raney-Fe model catalyst and composition catalytic surface with focus deposits. ...

This study evaluated the performance of a photoreactor packed with TiO2/glass, TiO2 immobilized on glass beads, initiated by UV irradiation, denoted as UV/TiO2/glass, to decompose di-n-butyl phthalate (DBP) in an aqueous solution. The photodegradation rate of DBP by this UV/TiO2/glass process was found to obey pseudo first-order kinetics represented by the Langmuir-Hinshelwood model. The experi...

The photocatalytic degradation of phenol in aqueous suspensions of TiO2 under different salt concentrations in an annular reactor has been investigated. In all cases, complete removal of phenol and mineralization degrees above 90% were achieved. The reactor operational parameters were optimized and its hydrodynamics characterized in order to couple mass balance equations with kinetic ones. The ...

Producing a definitive picture of the CO oxidation reaction (CO + O2 ? CO2) on Pt-group metals (Rh, Pd, Pt, and Ru) across the ‘pressure gap’ has proved to be a challenging task. Surface-sensitive techniques amenable to high pressure environments (e.g. PM-IRAS) have sparked a renewed interest in this reaction under realistic pressures. Here, we review recent work in our laboratory examining CO ...

Methyl oleate, an example of a FAME (fatty acid methyl ester), was produced by oleic (OA) photoesterification with TiO2 and UVA light. Different parameters were evaluated optimised: catalyst pretreatment, temperature (25–65 °C), loading (1–30 % w/wOA) : alcohol molar ratio (1 3–1 55). Response surface quadratic methodology obtained central composite rotational design (RSM-CCRD) used to evaluate...

TiO2-coated porous silica glass tubes containing macropores were fabricated and evaluated for their water-purification capacity using aqueous solutions of methylene blue. From the results of photocatalytic degradation tests at different initial methylene blue concentrations, the equilibrium adsorption constant (K) was determined to be 4.6 × 10−2 L μmol−1, and the Langmuir-Hinshelwood rate const...