Catalytic oxidation

In this research, the nanosized Fe2V4O13 complex oxide material was synthesized by the hydrothermal method. Its structure, morphology characterization, and other properties were determined using X-ray, SEM, EDX, and DTA-TG methods.

5p vikwong 29-09-2024 2 1   Download

Volatile organic compounds (VOCs) are one of the environmental pollutants of concern because they contribute to polluted environmental phenomena such as photochemical smog and secondary particulate matter. The current research focuses on preparing the manganese oxide catalyst by many different methods and evaluating their activity in the toluene oxidation reaction.

6p vikwong 29-09-2024 2 1   Download

A copper-organic framework Cu2(BDC)2DABCO was synthesized, and used as a recyclable heterogeneous catalyst for C-N coupling reaction between benzamide and cyclohexane. 94% yield of N-cyclohexylbenzamide was achieved under the optimized condition. The copper-organic framework catalyst was truly heterogeneous and could be used at least 4 cycles without degradation of catalytic performance.

6p vikwong 29-09-2024 4 1   Download

This study focused on the preparation of silver nanoparticles embedded on the supports such as bentonites, zeolites, activated carbon, zinc oxide, and aluminum oxide. Catalytic activity was evaluated via the transfer hydrogenation of 4-methoxybenzaldehyde. The results will be presented in this report.

5p vikwong 29-09-2024 4 2   Download

The Adsorption – desorption is considered as one of the most promising VOCs treatment technologies due to its cheap operational cost and low energy consumption. However, there are a huge amount of adsorbed VOCs released in desorption process. That is the reason why this study focused on the combination of adsorption-desorption with catalytic oxidation to treat completely VOCs as toluene.

6p vikwong 29-09-2024 3 1   Download

The higher catalytic performance of CuMnOx than MnO2, CuO because of its higher specific surface area and its lower reduction temperature. The results also implied that the interaction between Cu and Mn could improve the reduction capacity of CuMnOx catalyst. In summary, the CuMnOx catalyst is a promising catalyst for toluene treatment.

7p vikwong 29-09-2024 4 1   Download

The catalytic activity and product selectivity were determined by using a gas chromatography coupled with a mass selective detector. Our study suggests that the oxidation reaction in water could be catalyzed by gold with the presence of weak-base solids.

9p vikwong 29-09-2024 1 1   Download

In this study, SrTiO3 catalyst was prepared by sol-gel method and CuOZnO by co-precipitation for oxidative coupling of methane (OCM). The XRDresults showed a stable phase structure and high crystallinity with both samples. NH3-TPD recorded weak acid centers on SrTiO3, leading to coke formation on the impact surface. H2-TPR and O2 - TPD express the redox of CuO-ZnO, resulting in a deep oxidation product of CO2.

8p vikwong 29-09-2024 4 1   Download

This work investigated the modification of MnOx catalysts by doping various metals (e.g., Cu) and supporting them on cordierite honeycomb ceramics using the impregnation method. The catalysts were characterized by BET, XRD, SEM-EDX, and H2-TPR techniques. The Cu1Mn2Ox catalyst exhibited the best catalytic performance, achieving complete oxidation of benzene and toluene at 275°C with a WHSV of 18,000 mL/(g·h).

6p vikwong 29-09-2024 3 1   Download

This article, we present a thorough and straightforward hydrothermal method towards the production of reduced graphene oxide templated MIL-53(Fe) hybrids RGO@MIL-53(Fe). The structural characteristics of created hybrids were identified by using BET, FESEM, powder X-ray diffraction, and FTIR techniques. Methylene blue (MB) dye (a model water pollutant) was used to evaluate H2O2-assisted photo-catalytic efficiency of RGO@MIL-53(Fe).

9p dianmotminh02 03-05-2024 4 2   Download

The results show that the cerium oxide spherical nanoparticles built from primary nanoparticles with the average size of ~5 nm, exhibited dispersion and uniform size and shapes with their average particle diameter of ~50 nm in size. With such a good morphology, CeO2 material possessed good catalytic activity for the decomposition of methylene blue (MB), in which the material was synthesized at a hydrothermal temperature of 80 oC (CeO2-80) for the best MB decomposition performance.

10p meyerowitz 25-12-2021 5 0   Download

Objective of the study: The general objective of this study is to produce catalysts of bimetallic oxides (Cu-Co), on porous materials (activated carbon, silica gel, MCM-41) to adsorb and oxidize VOCs, which is represented by toluene, a popular VOCs with particular properties of the BTEX group in many industrial factories, at low temperature.

144p armyofthedead 23-06-2021 20 2   Download

Research purpose: Using computational chemistry methods to study the mechanism of hydrogenation CO on the transition metal catalyst systems of Ni, Cu, Co, bimetallic catalysts NiCu, CoCu and catalytic systems bearing cluster on oxide carriers: MgO, Al2O3 and activated carbon (AC); compare and clarify the role of catalyst centers in single or bimetallic catalyst systems; clarifies the role of carriers (MgO, Al2O3 and AC) in the hydrogenation of CO.

27p thebadguys 08-06-2021 26 4   Download

Successfully synthesized nano – mixed oxide by different gelling agents; compared, selected the appropriate gelling agent; researched to evaluate the catalytic activity of mixed oxide nanoparticles formed with pollutants methyl orange (MO), methylene blue (MB). Successful dispersed mixed oxide nanoparticles on rGO; investigated catalytic activity of material systems on parathion, fenitrothion.

28p capheviahe26 25-01-2021 32 5   Download

TiO2-Graphene Oxide-Hemin (TiO2/GO/Hemin) ternary composite hybrid material was prepared by the sol-gel method and used as a heterogeneous catalyst for the photocatalytic degradation of organic contaminants. The catalytic activity of GO-TiO2-Hemin was evaluated by the degradation of Rhodamine B (RhB) under the UV-visible light irradiation and in the presence of hydrogen peroxide.

9p tamynhan4 06-09-2020 18 3   Download

Main contents of thesis: Introdution of fuel cell and studies on Pt catalysts and Pt alloy catalysts in PEMFC. Research on synthesis of catalytic materials Pt/C 20% wt. by electroless deposition method and evaluating to influence of experimental parameters such as pH, temperature... in the synthesis process on the properties of catalyst Pt / C 20%wt.

22p xacxuoc4321 09-07-2019 49 4   Download

The sepiolite support possesses fibrous structure. X-ray diffraction analysis pointed out that the TiO2 particles are firmly distributed on fibrous sepiolite matrix. All TiO2/sepiolite samples were tested for the degradation of rhodamine B and showed a high catalytic activity. The experimental data showed that the degradation efficiency of rhodamine B is correlated with the amount of TiO2 loadings and oxidant behavior. At room temperature, the conversion of rhodamine B reaches to 99-100 % over 6.0 wt% TiO2/sepiolite catalyst.

5p giesumanh 10-11-2018 57 1   Download

This paper presentes the results of complex formation of Mn2+ with Lumomagnezone (Lm or H2L) and with mixed ligands Lm, HCO3 - in the systems: H2O-Mn2+-Lm (1a) H2O-Mn2+-Lm-HCO3 (2a) The formerd complexes [MnHL]+, [Mn(HL)HCO3] have been used as catalysts for the reactions of H2O2 decomposion and Lm oxidation in the systems: H2O-Mn2+-Lm H2O2 (3a); H2O-Mn2+-Lm-HCO3 - -H2O2 (4a) It has shown that the catalytic activity of the complex [Mn(HL)HCO3] is much higher than that of [MnHL] +.

4p uocvong04 24-09-2015 47 3   Download

At the present, in order to increase octan number the izomerization of hydrocarbon has been studied in the world. Amongs metals and metal oxides on carriers, Pt on the alumina carrier is used most widely owing to the advantages such as thermal stability, high activity and high selectivity etc. The conversion and selectivity of the izomerization depend on the catalysts (the composition of the catalysts, the structure of the carriers, the distribution of metal, the acidity, the catalytic activity of the catalysts) and the reaction condition (temperature, volume flow, carrier gases ...).

4p uocvong04 24-09-2015 62 4   Download

Investigations of kinetics of p-xylene deep oxidation on CuO/ -Al2O3 and CuO/ZSM-5 have been carried out. Specific surface area and pore size of catalyst samples as well as metallic state characteristics and catalytic properties of copper have been established. Catalyst CuO/ZSM-5 has been found to be more active than the first one, but it expressed lower stability because of less stable active form of Cu2+ on zeolite surface.

6p uocvong03 24-09-2015 32 5   Download