Synthesis based on the wet impregnation method and characterization of iron and iron oxide-silica nanocomposites

MCM-22 is a microporous molecular sieve with a system of sinusoidal three-dimensional channels that do not interconnect themselves, which presents good adsorption capacity and high acidity. Thus, this study aims to evaluate the chemical and structural properties of the catalyst MgO/MCM-22 using wet impregnation method. The synthesis of the zeolite was performed using the static hydrothermal method. Through the XRD patterns, it was possible to observe that the metal incorporation process did not cause structural changes, as well as the analysis showed small peaks related to the magnesium oxide in the structure. The micrographs presented a spherical morphology with depression in the central region. FTIR spectra showed the typical peaks of metal with little differences in the typical peaks of MCM-22.

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Study on Preparation and Characterization of La2O3 Derived from Thai Monazite Ore Processing Supported Coal Fly Ash Catalyst

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.861.365 ◽

2020 ◽

Vol 861 ◽

pp. 365-370

Author(s):

Sasikarn Nuchdang ◽

Wilasinee Kingkam ◽

Orapun Leelanupat ◽

Dussadee Rattanaphra

Keyword(s):

Fly Ash ◽

Coal Fly Ash ◽

Impregnation Method ◽

Wet Impregnation ◽

Ore Processing ◽

Impregnation Temperature ◽

Monazite Ore ◽

Free Cao ◽

Wet Impregnation Method

This research aims to study the preparation and characterization of La2O3 supported coal fly ash catalyst. Studied La2O3 and coal fly ash (CFA) were obtained from Thai monazite ore processing and local supplier, respectively. The catalyst was prepared by wet impregnation method. The influences of La2O3 loading and impregnation temperature on the chemical composition, crystalline phase and surface morphology of the catalyst were examined by varying the amount of La2O3 (5, 10 and 20 wt%) and the impregnation temperature (room temperature, 100, 150 and 200 °C). Characterizations such as WDXRF, XRD and SEM were carried out. The XRD results demonstrated that the La2O3 was highly dispersed on the CFA support. A high La2O3 loading resulted in an increase free CaO dissolvation during the impregnation which inhibited the interaction between SiO2 and La2O3. The impregnation temperature had no significant effect on the chemical and physical properties of the catalyst. The coexist of Fe3O4 in the CFA support might impact to hinder the incorporation of La2O3 into SiO2 matrix.

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Characterization of Wet Impregnation Method for Catalytic Microcombustor by Using Platinum

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.699.163 ◽

2014 ◽

Vol 699 ◽

pp. 163-168

Author(s):

Nazri Murat Muhamad ◽

Azman Miskam Muhamad ◽

Ahmad Mohd Azmier ◽

Zainal Alimuddin Zainal Alauddin ◽

Zulfikar Ishak Mohammad

Keyword(s):

High Surface ◽

Catalyst Support ◽

Propargyl Alcohol ◽

Support Surface ◽

Impregnation Method ◽

Surface Porosity ◽

Wet Impregnation ◽

Surface Areas ◽

Wet Impregnation Method

The wet impregnation method for catalytic microcombustor was characterized by using platinum as a catalyst. The main purpose of this study is to increase the surface porosity of the catalyst support. A high surface porosity indicates that a high amount of catalyst was deposited within the surface areas. The performance of the catalytic microcombustor improves with increasing catalytic surface area. The stainless steel catalyst support was treated with sulfuric acid solution containing polyvinyl (3.89 wt%) and propargyl alcohol (1.48 wt%). Combustion test was performed using LPG-air to test the performance of the catalyst. The surface support treated with polyvinyl (PVA) showed a higher surface porosity and combustion blow-out limit compared with propargyl alcohol. The combustion mode changes from surface to submerged combustion after the catalyst was deposited in the support surface.

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Characterization of wet impregnation method for catalytic microcombustor using palladium

2013 IEEE Conference on Clean Energy and Technology (CEAT) ◽

10.1109/ceat.2013.6775651 ◽

2013 ◽

Author(s):

Muhamad Nazri Murat ◽

Muhamad Azman Miskam ◽

Zainal Alimuddin Zainal Alauddin ◽

Nor Irwin Basir ◽

Mohammad Zulfikar Ishak

Keyword(s):

Impregnation Method ◽

Wet Impregnation ◽

Wet Impregnation Method

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Nickel-based perovskite catalysts: synthesis and catalytic tests in the production of syngas

Cerâmica ◽

10.1590/0366-69132018643712329 ◽

2018 ◽

Vol 64 (371) ◽

pp. 436-442 ◽

Cited By ~ 3

Author(s):

E. O. Moraes Júnior ◽

J. O. Leite ◽

A. G. Santos ◽

M. J. B. Souza ◽

A. M. Garrido Pedrosa

Keyword(s):

Impregnation Method ◽

X Ray Diffraction ◽

Organic Precursor ◽

Wet Impregnation ◽

Partial Oxidation Reaction ◽

Conversion Level ◽

Temperature Programmed ◽

Perovskite Type ◽

Wet Impregnation Method ◽

H2 Selectivity

Abstract La1-xSrxNiO3 (x= 0.0, 0.3 or 0.7) perovskite-type oxides were synthesized using the modified proteic gel method and using collagen as an organic precursor. Catalysts of La1-xSrxNiO3/Al2O3 were obtained using the wet impregnation method. The synthesized catalysts were characterized by X-ray diffraction, surface area and temperature-programmed reduction. The catalysts were evaluated in the partial oxidation reaction of methane, and the levels of selectivity to CO, CO2, H2 and H2O were determined. Among the catalysts studied, the catalyst LaNiO3/Al2O3 had the highest methane conversion level (78%) and higher H2 selectivity (55%).

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Catalytic Activity Of Cu/η-Al2O3 Catalysts Prepared From Aluminum Scraps In The NH3-SCO and in the NH3-SCR of NO

10.21203/rs.3.rs-550091/v1 ◽

2021 ◽

Author(s):

Nawel Jr ◽

Thabet Makhlouf ◽

Gerard Delahay ◽

Hassib Tounsi

Keyword(s):

Catalytic Oxidation ◽

Catalytic Reduction ◽

Impregnation Method ◽

Wet Impregnation ◽

Reduction Of No ◽

Evaporation Method ◽

Nh3 Scr ◽

Scr Of No ◽

Selective Catalytic Oxidation ◽

Wet Impregnation Method

Abstract Copper loaded η-alumina catalysts with different copper contents have been prepared by impregnation/evaporation method. The catalysts were characterized by XRD, FTIR, BET, UV–vis, H2-TPR and evaluated in the selective catalytic reduction of NO by NH3 and in the selective catalytic oxidation of NH3. The characterization techniques showed that the impregnation/evaporation method permits to obtain highly dispersed copper oxide species on the η-alumina surface when low amount of copper is used (1wt. % and 2 wt.%). The wet impregnation method made it possible to reach a well dispersion of the copper species on the surface of the alumina for the low copper contents Cu(1)-Al2O3 and Cu(2)-Al2O3. The latter justifies the similar behavior of Cu(1)-Al2O3) and Cu(2)-Al2O3 in the selective catalytic oxidation of NH3 where these catalysts exhibit a conversion of NH3 to N2 of the order of 100% at T > 500°C.

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Effect of CNTs Support Diameter on Pt Particles Size and Distribution

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.119.231 ◽

2007 ◽

Vol 119 ◽

pp. 231-234

Author(s):

Yong Hwan Kim ◽

Yon Ki Seo ◽

Young Rae Cho ◽

Kwang Ho Kim ◽

Won Sub Chung

Keyword(s):

Electrochemical Impedance ◽

Pt Catalyst ◽

Impregnation Method ◽

Wet Impregnation ◽

Optimum Diameter ◽

Electro Oxidation ◽

Average Size ◽

Wet Impregnation Method ◽

Xrd And Tem ◽

Supported Pt Catalyst

The Platinum catalysts on the carbon nanotubes(CNTs) supports of various diameters were prepared by wet impregnation method using H2PtCl6 precursor. The samples using 100nm, 15~20nm, 10~15nm and 5~10nm diameters of CNTs and carbon nanofibers(CNFs) are named Pt/t- CNFs, Pt/MWNTs20, Pt/MWNTs10 and Pt/MWNTs5, respectively. The effects of CNTs diameter on the Pt particle size and distribution were investigated by the means of powder XRD and TEM observation. In addition, the electro-catalytic characteristics for methanol electro-oxidation were estimated by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) techniques. The average size of Pt particles increases as follows; Pt/MWNTs10 < Pt/MWNTs5 < Pt/MWNTs20 < Pt/t-CNFs. The electro-catalytic characteristics of Pt/MWNTs10 and Pt/MWNTs20 are found to be superior in comparison with the others. For preparation of the most effective supported Pt catalyst, the optimum diameter of CNTs support in the range of 10-20nm, is needed.

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Preparation of Cr Metal Supported on Sulfated Zirconia Catalyst

Materials Science Forum ◽

10.4028/www.scientific.net/msf.948.221 ◽

2019 ◽

Vol 948 ◽

pp. 221-227

Author(s):

Latifah Hauli ◽

Karna Wijaya ◽

Ria Armunanto

Keyword(s):

Sulfated Zirconia ◽

Reduction Process ◽

Catalyst Preparation ◽

Impregnation Method ◽

Wet Impregnation ◽

Zirconia Catalyst ◽

Isotherm Adsorption ◽

Sulfated Zirconia Catalyst ◽

Adsorption Desorption ◽

Wet Impregnation Method

Catalyst of Chromium (Cr) metal supported on sulfated zirconia (SZ) was prepared by wet impregnation method. This study aim to determine the optimal concentration of Cr metal that impregnated on SZ catalyst. Preparation of catalyst was conducted at different concentrations of Cr metal (0.5%, 1%, 1.5% (w/w)), impregnated on SZ catalyst, then followed by the calcinationand reduction process. Catalysts were charaterized by FTIR, XRD, XRF, SAA, TEM, and acidity test. The results showed the Cr/SZ 1% had the highest acidity value of 8.22 mmol/g which confirmed from FTIR spectra. All the crystal phase of these catalysts were in monoclinic. The specific surface area increased with the increasing of Cr metal concentration on SZ catalyst and the isotherm adsorption-desorption of N2 gas observed all the catalysts as mesoporous material. The impregnation process formed particles agglomeration.

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{CeO2/Bi2Mo1−xRuxO6} and {Au/Bi2Mo1−xRuxO6} Catalysts for Low-Temperature CO Oxidation

Catalysts ◽

10.3390/catal9110947 ◽

2019 ◽

Vol 9 (11) ◽

pp. 947 ◽

Cited By ~ 2

Author(s):

Edson Edain González ◽

Ricardo Rangel ◽

Javier Lara ◽

Pascual Bartolo-Pérez ◽

Juan José Alvarado-Gil ◽

...

Keyword(s):

Co Oxidation ◽

Photoelectron Spectroscopy ◽

Supported Catalysts ◽

Pollutant Emissions ◽

Impregnation Method ◽

Wet Impregnation ◽

X Ray ◽

Low Temperature Co Oxidation ◽

Carbon Dioxide Co2 ◽

Wet Impregnation Method

Nowadays, one of the most important challenges that humanity faces is to find alternative ways of reducing pollutant emissions. CeO2/Bi2Mo1−xRuxO6 and Au/Bi2Mo1−xRuxO6 catalysts were prepared to efficiently transform carbon monoxide (CO) to carbon dioxide (CO2) at low temperatures. The systems were prepared in a two-step process. First, Bi2Mo1−xRuxO6 supports were synthesized through the hydrothermal procedure under microwave heating. Then, CeO2 was deposited on Bi2Mo1−xRuxO6 using the wet impregnation method, while the incipient impregnation method was selected to deposit gold nanoparticles. The CeO2/Bi2Mo1−xRuxO6 and Au/Bi2Mo1−xRuxO6 catalysts were characterized using SEM microscopy and XRD. Furthermore, energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy were used. Tests were carried out for the supported catalysts in CO oxidation, and high conversion values, nearing 100%, was observed in a temperature range of 100 to 250 °C. The results showed that the best system was the Au/Bi2Mo0.95Ru0.05O6 catalyst, with CO oxidation starting at 50 °C and reaching 100% conversion at 186 °C.

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