Catalysis and Reaction Engineering Commons^™

Preparation And Properties Of Titanium Based Metal Oxide Electrodes For Ammonia Nitrogen Wastewater Treatment, Xue Li, Meng Xue, Ling Huang, Jun-Tao Li, Shi-Gang Sun

Journal of Electrochemistry

In this paper, four types of titanium based metal oxides electrodes were prepared by thermal decomposition method: Ti/SnO₂+Sb₂O₃, Ti/SnO₂+Sb₂O₃/SnO₂+IrO₂, Ti/SnO₂+Sb₂O₃/SnO₂+RuO₂, Ti/SnO₂+Sb₂O₃/SnO₂+CeO₂. The XRD results show that CeO₂ in Ti/SnO₂+Sb₂O₃/SnO₂+CeO₂ displayed a good crystal structure, and there was no significant oxygen evolution reaction occurred after electrolytic oxidation. Compared with the other three electrodes, the Ce-doped …

Naio4 Oxidation Of Mussel Adhesive Protein Film And Its Corrosion Protection For Mg-1.0ca Alloy, Rui-Qing Hou, Ping-Li Jiang, Shi-Gang Dong, Chang-Jian Lin

Journal of Electrochemistry

The effect of oxidation of mussel adhesive protein (Mefp-1) film on the corrosive resistance for Mg-1.0Ca alloy was investigated by scanning electron microscopy (SEM), atom force microscopy (AFM), electron probe microanalysis (EPMA), Infrared reflection absorption spectroscopy (IRAS) and electrochemical methods. The results showed that the NaIO₄ induced oxidation of the pre-formed Mefp-1 film with porous morphology involved structural change of the DOPA group in the protein and resulted in a more uniform film with net-like morphology. The protein film without oxidation had an increasing resistance for the corrosion of Mg-1.0Ca alloy up to 7 days exposure. After oxidation, Epit …

Alumina Supported Iron Catalyst For Hydrogen Production: Calcination Study, Anis H. Fakeeha, Wasim Ullah Khan, Ahmed A. Ibrahim, Raja L. Al-Otaibi, Ahmed S. Al-Fatesh, Moustafa A. Soliman, Ahmed E. Abasaeed

Chemical Engineering

Production of clean hydrogen from thermal decomposition of methane was studied over impregnated 30%Fe/Al2O3 catalysts in a micro-activity fixed-bed reactor. The reactant gases comprising CH4 and N2 in the ratio of 1.5 to 1 were passed through reactor at a flow rate of 25 mL/min. Moreover, effect of calcination was investigated as well. The catalytic activity results indicated that calcination temperature had a significant impact on the performance of 30%Fe/Al2O3 catalyst. The catalyst calcined at 450°C, having CH4 conversion as well as H2 yield over 70%, showed better activity as compared to all other calcination temperatures.

Designed Synthesis Of Nanoporous Organic Polymers For Selective Gas Uptake And Catalytic Applications, Pezhman Arab

Theses and Dissertations

Design and synthesis of porous organic polymers have attracted considerable attentions during the past decade due to their wide range of applications in gas storage, gas separation, energy conversion, and catalysis. Porous organic polymers can be pre-synthetically and post-synthetically functionalized with a wide variety of functionalities for desirable applications. Along these pursuits, we introduced new synthetic strategies for preparation of porous organic polymers for selective CO₂ capture.

Porous azo-linked polymers (ALPs) were synthesized by an oxidative reaction of amine-based monomers using copper(I) as a catalyst which leads to azo-linkage formation. ALPs exhibit high surface areas of up to 1200 …

Advances In Direct Formic Acid Fuel Cells: Fabrication Of Efficient Ir/Pd Nanocatalysts For Formic Acid Electro-Oxidation, Islam M. Al-Akraa, Ahmad M. Mohammad, Mohamed S. El-Deab Prof, Bahgat E. El-Anadouli Prof

Chemical Engineering

No abstract provided.

Fe Supported Alumina Catalyst For Methane Decomposition: Effect Of Co Coupling, Anis H. Fakeeha, Ahmed A. Ibrahim, Ahmed S. Al-Fatesh, Wasim Ullah Khan, Yahya A. Mohammed, Ahmed E. Abasaeed, Moustafa A. Soliman, Raja L. Al-Otaibi

Chemical Engineering

In recent years hydrogen production received enormous attention, since it is an environmentally friendly, energy source. The aim of this research was to examine the hydrogen production with the help of methane’s catalytic decomposition. 30% Fe coupled with different % of Co over alumina support, were examined by catalytic decomposition of methane for the production of hydrogen. The catalysts were prepared by impregnation method. The catalytic activity results revealed that the catalysts, coupled 15%Co gave the highest conversion of 72.5% as depicted by the three hour time on stream profile. The fresh and spent catalysts were characterized using different techniques …

Thermo-Catalytic Methane Decomposition: A Review Of State Of The Art Of Catalysts, Ahmed A. Ibrahim, Ahmed S. Al-Fatesh, Wasim Ullah Khan, Moustafa A. Soliman, Raja L. Al-Otaibi, Anis H. Fakeeha

Chemical Engineering

The catalytic methane decomposition to produce carbon oxides–free hydrogen and carbon nanomaterial is a promising method feasible for larger production at a moderate cheap price. The produced hydrogen is refined and can be employed straight in fuel cell and in petrochemical industries to produce ammonia and methanol. Auto-thermal reforming of natural gas, partial oxidation, steam reforming are the conventional techniques for hydrogen production in industry, though these processes incur excessive costs for the purification of hydrogen from producing carbon oxides. Current research work on thermo-catalytic methane decomposition has concentrated on promoting the catalytic activity and stability for simultaneous production of …

On The Catalytic Activity Of Palladium Nanoparticles-Based Anodes Towards Formic Acid Electro-Oxidation: Effect Of Electrodeposition Potential, Islam M. Al-Akraa Dr., Ahmad M. Mohammad Prof, Mohamed S. El-Deab Prof, Bahgat E. El-Anadouli Prof

Chemical Engineering

In this investigation, the catalytic activity of palladium nanoparticles (PdNPs)-modified glassy carbon (GC) (simply noted as PdNPs/GC) electrodes towards the formic acid electro-oxidation (FAO) was investigated. The deposition of PdNPs on the GC substrate was carried out by a potentiostatic technique at different potentials and the corresponding influence on the particles size and crystal structure of PdNPs as well as the catalytic activity towards FAO was studied. Scanning electron microscopy (SEM) demonstrated the deposition of PdNPs in spherical shapes and the average particle size of PdNPs deposited at a potential of 0 V vs. Ag/AgCl/KCl(sat.) was the smallest (ca. 8 …

Influence Of Support Type And Metal Loading In Methane Decomposition Over Iron Catalyst For Hydrogen Production, Ahmed A. Ibrahim, Ahmed S. Al-Fatesh, Wasim Ullah Khan, Moustafa A. Soliman, Raja L. Al-Otaibi, Anis H. Fakeeha

Chemical Engineering

Natural gas resources, stimulate the method of catalytic methane decomposition. Hydrogen is a superb energy carrier and integral component of the present energy systems, while carbon nanotubes exhibit remarkable chemical and physical properties. The reaction was run at 700 °C in a fixed bed reactor. Catalyst calcination and reduction were done at 500 °C. MgO, TiO2 and Al2O3 supported catalysts were prepared using a co-precipitation method. Catalysts of different iron loadings were characterized with BET, TGA, XRD, H2-TPR and TEM. The catalyst characterization revealed the formation of multi-walled nanotubes. Alternatively, time on stream tests of supported catalyst at 700 °C …

Fundamental Studies Of Surfactant Templated Metal Oxide Materials Synthesis And Transformation For Adsorption And Energy Applications, Saikat Das

Theses and Dissertations--Chemical and Materials Engineering

This work addresses fundamental aspects of designing templates and curing conditions for the synthesis of mesoporous metal oxide thin films. The first section addresses selection of cationic-carbohydrate surfactant mixtures to synthesize templated silica thin films for selective adsorption of simple carbohydrates based on molecular imprinting. Nuclear magnetic resonance and fluorescence spectroscopy results suggest a novel structure for mixtures of alkyl glucopyranosides or xylopyranosides with cationic (trimethylammonium) surfactants. Despite thermodynamically favorable mixing, the carbohydrate headgroups in the mixed micelle adopt an inverted configuration with their headgroups in the micelle core, and therefore are inaccessible for molecular imprinting. This orientation occurs even …

The Synthesis Of Solid Supported Palladium Nanoparticles: Effective Catalysts For Batch And Continuous Cross Coupling Reactions, Kendra W. Brinkley

Theses and Dissertations

Catalysis is one of the pillars of the chemical industry. While the use of catalyst is typically recognized in the automobile industry, their impact is more widespread as; catalysts are used in the synthesis of 80% of the US commercial chemicals. Despite the improved selectivity provided by catalyst, process inefficiencies still threaten the sustainability of a number of synthesis methods, especially in the pharmaceutical industry. Recyclable solid supported catalysts offer a unique opportunity to address these inefficiencies. Such systems coupled with continuous synthesis techniques, have the potential to significantly reduce the waste to desired product ratio (E-factor) of the production …