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Article
Electrocatalytic Oxidation of Glycerol using Electrolessly Deposited CuNiSnP Electrocatalysts Supported on Carbon in Alkaline Media
The electro-oxidation of glycerol (EOG) has gained wide attention as an alternative to producing value-added chemicals for glycerol valorization. In this study, a multimetallic electrocatalyst containing coppe...
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Article
Process optimization on co-production of lignin and cellulose in deep eutectic solvent pretreatment of oil palm empty fruit bunch
Recoveries of lignin and cellulose from oil palm empty fruit bunch (OPEFB) via deep eutectic solvent (DES) pretreatment, particularly choline chloride–lactic acid (ChCl-LA), were optimized in this study. The e...
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Article
Open AccessSequential electrodeposition of Cu–Pt bimetallic nanocatalysts on boron-doped diamond electrodes for the simple and rapid detection of methanol
In this work, a novel electrochemical sensor for methanol determination was established by develo** a bimetallic catalyst with superiority to a monometallic catalyst. A Cu–Pt nanocatalyst was proposed and ea...
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Article
Open AccessEffects of TiO2 structure and Co addition as a second metal on Ru-based catalysts supported on TiO2 for selective hydrogenation of furfural to FA
The TiO2 supported Ru-based catalysts were prepared with 1.5 wt% Ru and 0–0.8 wt% Co on various TiO2 (anatase, rutile, P-25, and sol–gel TiO2) and studied in the liquid-phase selective hydrogenation of furfural t...
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Article
Open AccessIdentification of extremely hard coke generation by low-temperature reaction on tungsten catalysts via Operando and in situ techniques
The coke formation in the catalytic system mainly cause to the catalyst deactivate resulting the dramatic decreasing of the catalyst performance then the catalyst regeneration was required. In this study, addi...
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Article
Open AccessRole of Al in Na-ZSM-5 zeolite structure on catalyst stability in butene cracking reaction
The Na-ZSM-5 catalysts (SiO2/Al2O3 molar ratio = 20, 35, and 50) were prepared by rapid crystallization method to investigate their performance in butene cracking reaction. The XRD, XRF, NH3-TPD, FT-IR, TPO, UV–...
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Article
Enhanced Stability and Propene Yield in Propane Dehydrogenation on PtIn/Mg(Al)O Catalysts with Various In Loadings
The dehydrogenation of propane on In-promoted Pt (0.3 wt% Pt) supported on hydrotalcite Mg(Al)O with different In loadings (0.2–1.0 wt% In) was investigated at 550 °C atmospheric pressure. All the bimetallic P...
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Article
Comparative Study of Lewis Acid Transformation on Non-reducible and Reducible Oxides Under Hydrogen Atmosphere by In Situ DRIFTS of Adsorbed NH3
The Lewis acid transformation to Bronsted acid was investigated over the Pt/γ-Al2O3 hybrid catalysts in the presence of hydrogen atmosphere by in situ diffuse reflectance infrared Fourier transform spectroscopy (...
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Article
Effect of Surface Tungstate W5+ Species on the Metathesis Activity of W-Doped Spherical Silica Catalysts
The high surface area W-doped spherical silica (SSP) catalysts were prepared with different sequences of W and Si addition (W–Si(Alt), Si1–W2, and W1–Si2) by the sol–gel method with CTAB as a structure directing ...
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Article
Preparation of \(\hbox {TiO}_{2}\) supported Au–Pd and Cu–Pd by the combined strong electrostatic adsorption and electroless deposition for selective hydrogenation of acetylene
\(\hbox {TiO}_{2}\) ...
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Article
Tuning Pt dispersion and oxygen mobility of Pt/γ-Al2O3 by Si addition for CO oxidation
γ-Al2O3 was doped with TEOS solution to obtain SiO2 content in the range of 0.6–12.4 wt%. Pt dispersion was effectively enhanced by 82 and 45 % by do** 0.6 and 1.2 wt% SiO2, and was slightly declined afterward....
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Article
Ethylene and mixed 2-butene cis/trans isomers metathesis: Influence of lanthanum as a second metal on the WO3/SiO2 catalysts
Lanthanum (0.5, 0.6, 0.75, 0.9 and 1 wt%) was added as a second metal on the 9 wt% WO3/SiO2 catalysts by the incipient wetness impregnation method. The catalysts were tested in the metathesis reaction of ethylene...
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Article
Effect of Dispersion of the Active Phase on the Activity and Coke Formation over WO3/SiO2 Catalysts in the Metathesis of Ethylene and 2-Butene
WO3/SiO2 catalysts with various tungsten loadings were prepared by the incipient wetness impregnation method and studied in the metathesis of ethylene and trans-2-butene as feed to produce propylene. Two differen...
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Article
Influence of Crystallite Size of TiO2 Supports on the Activity of Dispersed Pt Catalysts in Liquid-Phase Selective Hydrogenation of 3-Nitrostyrene, Nitrobenzene, and Styrene
Supported Pt catalysts were prepared using several kinds of TiO2 supports different in the crystallite size in the range of 10–500 nm and their catalytic activity was tested for the liquid-phase hydrogenation of...
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Article
One-step preparation of Pt–Ce and Pt–Sn–Ce/Al2O3 catalysts by flame spray pyrolysis in propane dehydrogenation
Nanocrystalline Pt–Ce/Al2O3 and Pt–Sn–Ce/Al2O3 catalysts with various Ce loading contents have been prepared by one-step flame spray pyrolysis (FSP). The resulting nanopowders consisted of spherical single-crysta...
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Article
Influence of micro- and nano-sized SiO2 excess support on the metathesis of ethylene and trans-2-butene to propylene over silica-supported tungsten catalysts
Silica-supported tungsten catalysts with various tungsten oxide loadings were physically mixed with micro- or nano-sized SiO2 excess supports and investigated in the metathesis of ethylene and trans-2-butene to p...
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Article
Comparative Effect of Nano-Sized ZrO2 and TiO2 Additional Supports in Silica-Supported Tungsten Catalysts on Performance in Metathesis of Ethylene and 2-Butene to Propylene
The concept of thermal spreading has been adapted in this work to obtain special performance catalyst where the increase of conversion and selectivity were observed beyond the increase of coking. Nano-sized ZrO2 ...
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Article
Pd/TiO2 catalysts prepared by electroless deposition with and without SnCl2 sensitization for the liquid-phase hydrogenation of 3-hexyn-1-ol
Pd/TiO2 catalysts were prepared by the electroless deposition method with and without SnCl2 sensitization and employed in the liquid-phase selective hydrogenation of 3-hexyn-1-ol under mild conditions (40 °C, H2 ...
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Article
Effect of Nano-sized TiO2 Additional Support in WO3/SiO2 Catalyst Systems on Metathesis of Ethylene and Trans-2-Butene to Propylene
TiO2 was employed as an additional support by physical mixing with the WO3/SiO2 catalysts and used in the metathesis of ethylene and trans-2-butene for propylene production. Having nano-sized TiO2 as the addition...
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Article
CO2 hydrogenation over Co/Al2O3 catalysts prepared via a solid-state reaction of fine gibbsite and cobalt precursors
The properties of Co/Al2O3 catalysts prepared by the solid-state reaction between gibbsite and various cobalt salts such as cobalt acetate (CoAc), cobalt acetylacetonate, cobalt chloride, and cobalt nitrate (CoNT...
