23 Result(s)
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Article
Preparation of Copper Oxide with High Surface Area Associated with Mesoporous Silica
Copper oxide was synthesized by the one-pot synthesis methods associated with mesoporous silica in different synthetic conditions. The SBA route with Cu citrate sol was the most effective to prepare CuO with h...
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Article
A catalytic membrane reactor for water-gas shift reaction
We conducted the WGS reaction on a catalytic membrane reactor consisting of a WGS catalyst bed, Pt/CeO2 and thin, defect-free, Pd-Cu alloy membranes. The presence of CO and other gases with H2 reduced the H2 perm...
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Article
Influence of Catalyst Binders on the Acidity and Catalytic Performance of HZSM-5 Zeolites for Methanol-to-Propylene (MTP) Process: Single and Binary Binder System
The effect of the binders, such as silica, alumina, and aluminum phosphate solution (APS), was studied on the acidity and catalytic performance of HZSM-5 zeolite (SiO2/Al2O3 = 80) in methanol-to-propylene (MTP) p...
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Article
Selective catalytic reduction of NO with CO on Pt/W–Ce–Zr catalysts
Various Pt catalysts (Pt/ZrO2, Pt/CeO2, Pt/CeZrO, Pt/WO3/ZrO2 and Pt/WO3/CeZrO) were prepared and characterized, and their catalytic reduction reactions of NO by CO, with or without the presence of excess oxygen,...
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Article
The studies of hydrodesulfurization activity over molybdenum catalysts supported on Al-MCM-41 modified by lanthanum
A series of lanthanum modified Al-MCM-41 substrates served as supports to prepare the Mo/La-Al-MCM-41 catalysts. The catalysts were characterized by XRD, BET, FT-IR, XPS, TPR and TPD, and their catalytic activ...
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Article
Nature of carbonaceous deposits on the alumina supported transition metal oxide catalysts in the wet air oxidation of phenol
Al2O3 supported transition metal (Mn, Fe, Co, Ni, and Cu) oxide catalysts were prepared and tested for the wet oxidation of phenol. The supported copper oxide catalysts showed the highest catalytic activity due t...
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Article
Catalytic properties of potassium-or lanthanum-promoted Co/γ-Al2O3 catalysts in carbon monoxide hydrogenation
The effects of potassium or lanthanum additives on the catalytic properties of alumina-supported cobalt catalysts were examined through carbon monoxide hydrogenation reaction. The catalysts were characterized ...
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Article
Deactivation control through accelerated precoking for the CoMo/γAl2O3 catalysts in thiophene hydrodesulfurization
Information on the degree of deactivation is very important for predicting catalyst life, from which the catalyst design could be further improved. The CoMo/Al2O3 catalysts, used for the hydrodesulfurization of l...
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Article
Preparation of mo nitride catalysts and their applications to the hydrotreating of indole and benzothiophene
Molybdenum nitrides were prepared by temperature-programmed reduction of MoO3 with flowing NH3. They were tested for indole HDN and benzothiophene HDS. Too low or high NH3 space velocity was inadequate to produce...
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Article
Effect of active site distribution on liquid-phase olefin hydrogenation over polymer-supported palladium complex
Chloromethylated polystyrene beads with different distributions have been prepared and phosphinated. PdCl2 was supported on the phosphinated supports to give polymer-supported Pd complex catalysts with different ...
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Article
Characteristics of metallic iron in Y-zeolite catalysts reduced by hydrogen atom beams
Hydrogen atom beams were used to reduce the ionic species of iron-Fe(II) and Fe(III) in Y-zeolite. Reduction to metallic states was confirmed by ferromagnetic resonance (FMR) spectroscopy, and the catalytic ac...
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Article
Crystal growth of high silica ZSM-5 at low temperature synthesis conditions
At the temperature of 90°C and under atmospheric pressure, growth kinetics of high silica ZSM-5 was investigated through a long induction, nucleation and crystal growth periods. It was found the entire crystal...
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Article
Characteristics of intermetallic NdNi5 as an unsupported catalyst in thiophene hydrodesulfurization
A systematic research is carried out on intermetallic NdNi5 for the hydrodesulfurization (HDS) of thiophene. The effect of calcination and presulfidation of intermetallic NdNi5 on thiophene HDS was examined and p...
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Article
Effect of metal dispersion on CO hydrogenation over Pd/HZSM-5 catalysts
Pd/HZSM-5 catalysts prepared by ion-exchange method using Pd(NH3) 4 2+ were calcined and reduced at different temperatures to provide different metal dispersio...
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Article
Characteristics of bimetallic cobalt and molybdenum catalysts supported on activated carbon or alumina in hydrodesulfurization
A series of bimetallic cobalt (Co) and molybdenum (Mo) catalysts supported on activated carbon or alumina were prepared, and their activities in thiophene hydrodesulfurization and ethylene hydrogenation were c...
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Article
Thiophene hydrodesulfurization using unsupported nickel-neodymium bimetal catalysts
The hydrodesulfurization of thiophene was studied over unsupported nickel-neodymium bimetallic catalysts. The physical and chemical changes of bimetals were observed after calcination and presulfidation, respe...
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Article
Methylformate formation from methanol and CO ON Cu/ZnO catalysts
The reaction mechanism for the methylformate formation on Cu/ZnO catalysts from methanol and CO was investigated by the labeling study with13C methanol. It was found that methylformate could be formed through two...
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Article
Isomerization of 1-hexene catalyzed over polymer-supported RuCl2(PPh3)3
Polymer-supported ruthenium catalyst was prepared by anchoring dichlorotris(triphenylphosphine)ruthenium, RuCl2(PPh3)3, onto the phosphinated polystyrene bead. The polymer-supported RuCl2(PPh3)3 could be reused s...
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Article
Rate multiplicity due to interactions between adsorbed species
A generalized Langmuir-Hinshelwood mechanism for the reaction A + 1 /2B2 ⇌ C has been studied. Lateral (nearest neighbor) interactions between the adsorbed species have been considered to analyze the multiple ste...
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Article
Effect of carbon deposits on the properties of co/y-zeolite catalysts for co hydrogenation
Co/Y-zeolite catalysts were prepared by three different preparation methods of excess-water (EW), ion-exchange(IE) and carbonyl complex-impregnation(CI), and they were deposited by carbon through the dispropor...
