Catalytic reactions

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

The replacement of noble metals in homogeneous catalysts for the current CO2 hydrogenation reaction with 3D transition metals (Fe, Co, Ni and Mn), with lower costs, have attracted a great attention of many research groups to the interconversion of chemical and electrical energy, like CO2 and H2.

5p vikwong 29-09-2024 3 2   Download

In this article, the results of the research on organic pollutant treatment in the wastewater of printing processes on fabric by H2O2 under the catalytic role of the complex between ion Ni2+ and Citric acid (H4L) were presented.

5p vikwong 29-09-2024 3 1   Download

he catalytic dehydration of ethanol is a potential alternative route to synthesize ethylene apart from the traditional method which depends on fossil fuels. This report successfully prepared modified ZSM-5 with mesopores using desilication methods to enhance ethanol catalytic dehydration performance and ethylene production at lower temperature.

5p vikwong 29-09-2024 2 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

Bài giảng Xúc tác - Chương 4: Động học phản ứng xúc tác (Kinetics of catalytic reactions). Chương này cung cấp cho học viên những nội dung gồm: giới thiệu; nồng độ trên bề mặt của chất bị hấp phụ; các mô hình (model) phản ứng trên xúc tác rắn; cách xây dựng phương trình tốc độ;... Mời các bạn cùng tham khảo!

11p mothuahoa 04-05-2024 4 2   Download

In this research, in an attempt to make use of the kaolin resources in Vietnam, we present a synthetic process of zeolite A via hydrothermal from kaolinite, together with the modification process of zeolite A using different metallic cations. The characteristics of the prepared zeolite LTAs such as chemical composition and crystalline structure, as well as their catalytic activity in the methanation reaction of carbon dioxide (CO2) to methane (CH4) were extensively investigated.

8p dianmotminh02 03-05-2024 7 1   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

Purpose: Using the density functional method (DFT) to find out the mechanism of CO2 hydrogenation reaction, the main product, by-products, the optimal reaction path, compare and evaluate the catalytic ability of the Ni5 cluster, Ni5/MgO, and Ni5/AC.

25p thebadguys 08-06-2021 12 3   Download

The catalyst 7.5% NiO/TiO2 and seven samples of NiO/γ-Al2O3 with NiO content from 7.5% to 60% have been obtained and studied. Physico-chemical characteristics of the catalysts were determined by methods of Adsorption (BET), X-ray Diffraction (XRD), TemperatureProgrammed Reduction (TPR) and Hydrogen Pulse Titration. The catalytic properties of the obtained samples were investigated in the reaction of CO methanation at temperatures 180 – 220◦C and mole ratios hydrogen/carbon monoxide 25-100.

16p 12120609 01-06-2020 6 1   Download

A novel one-pot, solvent-free method for the synthesis of dithiocarbamates was developed through the reaction of corresponding alkyl halides, amines and carbon disulfide employing catalytic amount of benzyl trimethyl ammonium hydroxide (Triton-B).

8p tocectocec 25-05-2020 11 1   Download

In this work, nanoscale bimetallic PtNi, PtCo, PtCu catalysts on carbon Vulcan XC72R as supports were synthesized by reduction method under ultrasonic irradiation. The morphology, structure and specific area of synthesized materials were characterized by X-Ray diffraction (XRD), transmission electron microscopy (TEM). The catalytic activity for oxygen reduction reaction (ORR) of PtM/C was investigated by CV and linear sweep voltammetry (LSV) under simulated fuel cell working conditions.

8p abcxyz123_02 03-03-2020 9 1   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

Objectives of thesis: Study on phenol treatment in water by ozonation process combined with catalysts. An empirical kinetic model and one quadratic regression equations were built based on experimental data for destroying phenol by heterogeneous catalytic ozonation process with response variables (initial pH, ozone concentration, catalyst concentration and reaction time). Application of phenol treatment in coking wastewater.

29p xacxuoc4321 08-07-2019 18 4   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

The alternative fuels that are derived from non-fossil source are very promising fuels for the future. Catalytic cracking of vegetable oil sludge is an advanced method for obtaining of bio- fuels. The huge waste in the vegetable oil manufacture could be converted to bio-fuel. Cracking of vegetable oil sludge by HY catalyst using MAT5000 instrument is a precious method for studying this catalytic cracking reaction. By catalytic cracking, the LPG gas, gasoline product, LCO and HCO products are also formed of vegetable oil sludge.

7p uocvong04 24-09-2015 41 3   Download

The dependences of mol-fractions i of the formed complexes [Cu2+ Eni] and of the reaction rate W on concentration of ligand En were determinated. The obtained results showed that the forms and catalytic activity of complexes [Cu2+ Eni] were similar to that of metal-polymer AN-221.

4p uocvong04 24-09-2015 43 4   Download

Nanostructured Au-Ceria has been known as a promising catalyst for the low-temperature water-gas shisft reaction. The catalyst prepared by coprecipitation method with the gold loading various between 2 - 3 at.% with the crystallite size of 2.9 nm has been used to study some factors that effect to catalytic activity and long-term stability of this material.

5p uocvong04 24-09-2015 39 2   Download