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Article
Sorption selectivity of NaY- and KY- zeolites for xylene and toluene
The selective adsorption capacities of NaY- and KY-zeolites for xylene isonners and toluene were investigated by measuring the rate of unidirectional diffusion in a batch adsorber and the breakthrough behavior...
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Article
Alkylation of benzene with 1dodecene by macroreticular resin catalysts
The alkylation of benzene with 1-dodecene was performed in a batch reactor by two types of macroreticular ion exchange resin catalysts, i.e., Amberlyst 15 and Amberlyst XN-1010. The external mass transfer resi...
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Article
Deactivation phenomena of supported platinum catalysts during the hydrogenation of cyclopropane
Cyclopropane hydrogenation reaction was performed in a differential reactor operating at atmospheric pressure, 50‡C and H2/C3H6 ratio of 9, and the deactivation of the catalysts during the reaction was investigat...
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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...
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Article
Copolymerization kinetics obtained by stopped-flow polymerization
Ethylene-propylene copolymerization was carried out over MgCl2-supported TiCl4 catalyst with two different reaction schemes; i.e., stopped-flow copolymerization (SFC) and continuously-purged copolymerization (CPC...
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Article
Percolation analysis on free radical linear polymerization with instantaneous initiation
Free radical linear polymerization with instantaneous initiation was simulated on the simple cubic lattice. The monomer conversion, polydispersity index and average degree of polymerization were predicted by u...
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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
Characteristics of phosphinated styrene-divinylbenzene copolymer containing RuCl2(PPh3)3 for 1-hexene isomerization
Chloromethylated styrene-divinylbenzene(S-DVB) copolymer beads were prepared in macroporous type via direct copolymerization of chloromethylstyrene and divinylbenzene and then phosphinated. Dichlorotris(triphe...
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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
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
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
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 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 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
A study of the microstructure of yttria-stabilized zirconia deposited by inductively coupled plasma spraying
Zirconia stabilized with 20 wt.% yttria was deposited to a thick free-standing type, ∼7 mm, by (inductively coupled plasma spraying) (ICPS). The spheroidization of particles and the microstructure of deposits ...
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Article
Effects of Anion and Solvent on Properties of Alternating Ethylene/CO Copolymer Catalyzed by the Pd(II) Complex
Alternating copolymerization of ethylene and carbon monoxide was carried out using (dppp)Pd(OAc)2/anion complexes (dppp=1,3-bis(diphenylphosphino)propane) with various anions and solvents. Catalytic activity in a...
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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...
